CN102297831A - Test device and method for rapid gas logging of permeability of coal seam - Google Patents
Test device and method for rapid gas logging of permeability of coal seam Download PDFInfo
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- CN102297831A CN102297831A CN2011101337377A CN201110133737A CN102297831A CN 102297831 A CN102297831 A CN 102297831A CN 2011101337377 A CN2011101337377 A CN 2011101337377A CN 201110133737 A CN201110133737 A CN 201110133737A CN 102297831 A CN102297831 A CN 102297831A
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Abstract
The invention discloses a test device and method for rapid gas logging of permeability of coal seam. The test device is characterized by comprising a gas injection system and an observation system, wherein, the gas injection system comprises a gas injection system first sealing unit, a gas injection system second sealing unit and a marked gas injecting unit, and the observation system comprises an observation system first sealing unit, an observation system second sealing unit and a marked gas observing unit. According to the invention, the gas injection system is employed to inject marked gas with certain pressure into a sealed releasing air chamber, and a sealed collecting air chamber in the observation system is employed to collect the marked gas and discharge the marked gas out under a fixed pressure; the concentration and the flow rate of the discharged gas are detected; and permeability of coal seam is obtained according to the relationship between the permeability of coal seam and the concentration and the flow rate of the marked gas. The invention is applicable to on-site determination of permeability of coal mine underground mining coal and provides powerful technical support for research on gas migration, exploitation of coal bed gas and the technology of coal seam infusion.
Description
Technical field
The present invention relates to the infiltrative test unit in a kind of mensuration coal seam, and a kind of assay method; Relate in particular to the test unit that permeability quick gas in a kind of coal seam is surveyed, and the method for the quick gas survey of coal seam permeability.
Background technology
Coal body has certain perviousness as a kind of porous medium, and promptly the fluid of certain granules can permeate in coal body, even flows through in coal body, is delivered to down a kind of medium.Coal more as a kind of solid of natural formation, is wherein composed and is being deposited gas and moisture.The coal seam permeability, as the common counter of describing the coal seam water infusion complexity, also as the important physical parameter of Gas Flow complexity in the coal seam, it has reflected the complexity that enters coal body crack, hole when water filling.Because it is very complicated that situation is formed in the crack in coal seam, makes the fortune water-based in coal seam that very big difference be arranged on each part and all directions, have only the comprehensive average perviousness numerical value that adopts a certain zone of reflection, could represent the coal seam permeance property more truly.Simultaneously, along with developing rapidly of coal-mining technique and equipment thereof, the high-yield and high-efficiency workplace increases year by year, level of disruption repeatedly to coal seam and overlying strata thereof is also more and more stronger, under the influence of this high strength recovery activity, how will the permeability of adopting coal body change? which rule, its variation has?, this is gas hazard management and the primary problem that solves of control under research high strength working seam gas migration rule and the high strength mining conditions.
In coal body permeability research field, there are many experts to propose multiple research method, using commonplace at present is laboratory seepage flow experimental technique, but this method exists certain defective: 1. the extraction of coal body sample has destroyed the residing objective environment of coal body; 2. the dynamic evolution process in the crack of coal body under the mining influence has been ignored in seepage flow experiment in laboratory; 3. perviousness, the gas penetration potential of the fissure system in whole coal seam in seepage flow experiment in laboratory can not be simulated on a large scale.
This shows that the coal seam permeability should adopt the method for on-site measurement to determine accurately, but still do not have practical effective ways both at home and abroad up at present.
Summary of the invention
The present invention is directed to the existing shortcomings and deficiencies of present above-mentioned coal seam permeability determination technology, permeability test unit that quick gas is surveyed in a kind of coal seam is provided, and the method for the quick gas survey of a kind of coal seam permeability.This test unit can be used in the on-site measurement of adopting the coal body permeability under the coal mine with the method for reaching, can be by on-site measurement to the coal seam permeability, perviousness, the gas penetration potential in coal seam in the reflection on a large scale, and then the fissure system in the whole coal seam of overview, for the design of the colliery associated safety precautionary measures provides the data support.
Its technical solution is:
The test unit that permeability quick gas in a kind of coal seam is surveyed comprises gas injection system and recording geometry, and wherein gas injection system comprises packoff of gas injection system, No. two packoffs of gas injection system, gas marker injection device; Recording geometry comprises packoff of recording geometry, No. two packoffs of recording geometry, and the gas marker observation device;
In the above-mentioned gas injection system, packoff of gas injection system comprises that two seal capsules that are interconnected, a pressure-generating device, sealing medium accumulator, high-pressure hose, pressure gauge, a flow take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, a sealing medium accumulator by pipeline, No. one the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is interconnected two by high-pressure hose and has the seal capsule of certain distance to be connected; No. two packoffs of above-mentioned gas injection system comprise that a closed chamber, a pressure-generating device, No. two sealing medium accumulators, high-pressure hose, pressure gauge, flows take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, No. two sealing medium accumulators by pipeline, No. two the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber by high-pressure hose; Above-mentioned gas marker injection device comprises that a sealing discharges air chamber, gas marker accumulator, pressure maintaining valve, high-pressure hose, pressure gauge, flowmeter, unidirectional stop valve, the gas marker accumulator stores enough pressure energies, and by pipeline connection pressure maintaining valve, pressure gauge, flowmeter, unidirectional stop valve, pass through high-pressure hose then, successively pass a seal capsule, closed chamber and another seal capsule, discharge air chamber with sealing at last and be connected, be used for that gas marker is injected sealing with pressure stable and flow and discharge air chamber;
In the above-mentioned recording geometry, packoff of recording geometry comprises that two seal capsules that are interconnected, a pressure-generating device, sealing medium accumulator, high-pressure hose, pressure gauge, a flow take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, a sealing medium accumulator by pipeline, No. one the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is interconnected two by high-pressure hose and has the seal capsule of certain distance to be connected; No. two packoffs of above-mentioned recording geometry comprise that a closed chamber, a pressure-generating device, No. two sealing medium accumulators, high-pressure hose, pressure gauge, flows take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, No. two sealing medium accumulators by pipeline, No. two the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber by high-pressure hose; Above-mentioned gas marker observation device comprises a sealing gathering air chamber, gas marker gas collection measurement apparatus, pressure maintaining valve, high-pressure hose, pressure gauge, flow is taken into account unidirectional stop valve, sealing is drawn air chamber in and is successively passed a seal capsule by high-pressure hose, closed chamber and another seal capsule, link to each other with gas marker gas collection measurement apparatus at last, drawing air chamber in by sealing collects from the gas marker that passes the coal seam of above-mentioned sealing release air chamber direction, and the gas marker of collecting is pooled in the gas marker gas collection measurement apparatus with certain pressure, measure the flow and the concentration of collected gas marker simultaneously, use in order to measuring the coal seam permeability.
In packoff of above-mentioned gas injection system and packoff of recording geometry, pressure-generating device is transmitted to a sealing medium in the sealing medium accumulator by pipeline No. one with the pressure energy that produces in each packoff, and injects the media quantity of two seal capsules by pressure gauge, sealing medium of flowmeter control; In No. two packoffs of above-mentioned gas injection system and No. two packoffs of recording geometry, pressure-generating device is transmitted to No. two sealing mediums in the sealing medium accumulator by pipeline No. two with the pressure energy that produces in each No. two packoff, and injects the media quantity of closed chamber by pressure gauge, No. two sealing mediums of flowmeter control.
An above-mentioned sealing medium is preferably water, and No. two sealing medium is preferably emulsion, and gas marker is a spike gas, is preferably SF
6, CO
2Or Br
2
Closed chamber in No. two packoffs of above-mentioned gas injection system is between two seal capsules of a packoff of gas injection system, form by coal seam gas injection boring and seal capsule, and seal by coal seam gas injection boring and two seal capsules, sealing in the above-mentioned gas marker injection device discharges air chamber and is positioned at seal capsule the place ahead, forms by seal capsule and coal seam gas injection boring, and hole by packoff of gas injection system, No. two packoffs and coal seam gas injection and to seal; Closed chamber in No. two packoffs of above-mentioned recording geometry is between two seal capsules of a packoff of recording geometry, form with seal capsule by coal seam observation boring, and seal by coal seam observation boring and two seal capsules, the sealing of above-mentioned gas marker observation device is drawn air chamber in and is positioned at seal capsule the place ahead, forms by the observation boring of seal capsule and coal seam, and hole by packoff of recording geometry, No. two packoffs and coal seam observation and to seal.
Seal capsule in packoff of gas injection boring of above-mentioned coal seam and gas injection system is sealed No. two sealing mediums in the closed chamber of No. two packoffs of gas injection system up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam gas injection boring institute, final gas marker is sealed up for safekeeping in sealing release air chamber by one, No. two sealing medium and coal seam gas injection boring; Above-mentioned coal seam observes boring and the seal capsule in packoff of recording geometry seal No. two sealing mediums in the closed chamber of No. two packoffs of recording geometry up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam observation boring institute, final gas marker by one, No. two sealing medium and coal seam observation boring seal in sealing gathering air chamber.
Discharge air chamber or seal pressure and the flow that draws air chamber in by pressure generator, pressure maintaining valve, pressure gauge, flowmeter, one, No. two sealing medium of unidirectional stop valve control and sealing in above-mentioned gas injection system or the recording geometry, and make the pressure of one, No. two sealing medium discharge air chamber or seal the pressure that draws air chamber in, form sealing greater than sealing.
Above-mentioned gas marker gas collection measurement apparatus adopts drainage to collect gas marker.
The method that permeability quick gas in a kind of coal seam is surveyed may further comprise the steps:
Step 1, survey the district at colliery mining face under mine air intake or the stable area arrangements of return airway ocurrence of coal seam, in surveying the district, be furnished with a coal seam gas injection boring, the coal seam observation boring that some spacing unequal lengths differ, the parallel axes or the almost parallel of coal seam gas injection boring and coal seam observation boring;
In the above-mentioned steps 2, utilize gas injection system to discharge the gas marker that air chamber injects certain pressure to sealing, utilize the sealing in the recording geometry to draw air chamber collection gas marker in subsequently, and outwards discharge with fixed pressure, detect concentration and the flow that effluxes gas marker simultaneously, utilize the concentration of coal seam permeability, gas marker and the relation between the flow, obtain the permeability in coal seam.
The present invention has following useful technique effect:
Test unit and method that permeability quick gas in a kind of coal seam provided by the invention is surveyed, in the coal seam, arrange the construction drill of gas injection system, in the successful boring that satisfies condition, utilization can fast sealing a packoff, No. two packoffs, the gas marker injection device, with a sealing medium, No. two sealing medium successively is pressed into respectively in capsule chamber and the closed chamber, to discharge the air chamber isolating seal, inject the gas marker of certain pressure by accumulator, and keep sealing by pressure maintaining valve and discharge the stable of significant gas pressure value in the air chamber, gas marker pressure is less than the pressure of capsule chamber and closed chamber; Equally, in the construction drill of recording geometry, utilize the good gathering air chamber of seal isolation, collect the gas marker that passes the coal seam that gas injection system discharged, and constant emission pressure and emission flow that gas marker in the air chamber is drawn in sealing in are controlled, write down to the pressure maintaining valve, flowmeter, pressure gauge and the unidirectional stop valve that utilize recording geometry, concentration and flow according to the gas marker of discharging in the test, by the concentration of coal seam permeability, gas marker and the relation between the flow, obtain the permeability in coal seam.The present invention can be used in the on-site measurement of adopting the coal body permeability under the coal mine, by on-site measurement to the coal seam permeability, perviousness, the gas penetration potential in coal seam in the reflection on a large scale, and then the fissure system in the whole coal seam of overview, for the migration of research gas, cbm development, coal seam water infusion technology provide strong technical support.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and embodiment:
Fig. 1 shows gas injection system for the structural principle synoptic diagram of a kind of embodiment of test unit among the present invention.
Fig. 2 shows recording geometry for the structural principle synoptic diagram of a kind of embodiment of test unit among the present invention.
Embodiment
The test unit that permeability quick gas in a kind of coal seam is surveyed comprises gas injection system and recording geometry, and wherein gas injection system comprises packoff of gas injection system, No. two packoffs of gas injection system, gas marker injection device; Recording geometry comprises packoff of recording geometry, No. two packoffs of recording geometry, and the gas marker observation device.
In conjunction with Fig. 1, in the above-mentioned gas injection system, packoff of gas injection system comprises two seal capsules that are interconnected 1,2, a pressure-generating device 3, a sealing medium accumulator 4, high-pressure hose 5, pressure gauge 6, flowmeter 7 and unidirectional stop valve 8, pressure-generating device 3 is by pipeline and pressure gauge, No. one sealing medium accumulator 4 is connected, a sealing medium accumulator 4 is by pipeline and unidirectional stop valve, flowmeter is connected, the latter by high-pressure hose 5 with two seal capsules 1 that are interconnected, 2 are connected, can make a sealing medium inject seal capsule 1, in 2, seal capsule 1, leave certain distance between 2 so that form closed chamber 9.No. two packoffs of above-mentioned gas injection system comprise a closed chamber 9, pressure-generating device 3, No. two sealing medium accumulators 10, high-pressure hose 11, pressure gauge 6, flowmeter 12 and unidirectional stop valves 13, pressure-generating device 3 is connected with pressure gauge, No. two sealing medium accumulators 10 by pipeline, No. two sealing medium accumulator 10 is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber 9 by high-pressure hose 11.Above-mentioned gas marker injection device comprises that a sealing discharges air chamber 14, gas marker accumulator 15, pressure maintaining valve 16, high-pressure hose 17, pressure gauge 18, flowmeter 19, unidirectional stop valve 20, gas marker accumulator 15 stores enough pressure energies, and by pipeline connection pressure maintaining valve, pressure gauge, flowmeter, unidirectional stop valve, then by high-pressure hose 17, successively pass a seal capsule 1, closed chamber 9 and another seal capsule 2, discharge air chamber 14 with sealing at last and be connected, be used for that gas marker is injected sealing with pressure stable and flow and discharge air chamber.
In the above-mentioned recording geometry, packoff of recording geometry comprises two seal capsules that are interconnected 21,22, a pressure-generating device 23, a sealing medium accumulator 24, high-pressure hose 25, pressure gauge 26, flowmeter 27 and unidirectional stop valve 28, pressure-generating device 23 is by pipeline and pressure gauge, No. one sealing medium accumulator 24 is connected, a sealing medium accumulator 24 is by pipeline and unidirectional stop valve, flowmeter is connected, the latter by high-pressure hose 25 with two seal capsules 21 that are interconnected, 22 are connected, can make a sealing medium inject seal capsule 21, in 22, seal capsule 21, leave certain distance between 22 so that form closed chamber 29.No. two packoffs of above-mentioned recording geometry comprise a closed chamber 29, pressure-generating device 23, No. two sealing medium accumulators 30, high-pressure hose 31, pressure gauge 26, flowmeter 32 and unidirectional stop valves 33, pressure-generating device 23 is connected with pressure gauge, No. two sealing medium accumulators 30 by pipeline, No. two the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber 29 by high-pressure hose 31.Above-mentioned gas marker observation device comprises a sealing gathering air chamber 34, gas marker gas collection measurement apparatus 35, pressure maintaining valve 36, high-pressure hose 37, pressure gauge 38, flowmeter 39 and unidirectional stop valve 40, sealing is drawn air chamber 34 in and is successively passed a seal capsule 21 by high-pressure hose, closed chamber 29 and another seal capsule 22, link to each other with gas marker gas collection measurement apparatus at last, drawing air chamber in by sealing collects from the gas marker that passes the coal seam of above-mentioned sealing release air chamber direction, and the gas marker of collecting is pooled in the gas marker gas collection measurement apparatus with certain pressure, measure the flow and the concentration of collected gas marker simultaneously, use in order to measuring the coal seam permeability.
In packoff of above-mentioned gas injection system and packoff of recording geometry, pressure-generating device 3,23 is transmitted to a sealing medium in the sealing medium accumulator by pipeline No. one with the pressure energy that produces in each packoff, and injects the media quantity of two seal capsules by pressure gauge, sealing medium of flowmeter control; In No. two packoffs of above-mentioned gas injection system and No. two packoffs of recording geometry, pressure-generating device is transmitted to No. two sealing mediums in the sealing medium accumulator by pipeline No. two with the pressure energy that produces in each No. two packoff, and injects the media quantity of closed chamber by pressure gauge, No. two sealing mediums of flowmeter control.
In the aforesaid way, sealing medium adopts liquid, as water etc.; No. two sealing mediums adopt mucus, as emulsion etc.; Gas marker is a spike gas, as SF
6, CO
2, Br
2Deng.
In the aforesaid way, closed chamber 9 in No. two packoffs of gas injection system is between two seal capsules of gas injection system 1,2, form with seal capsule 1,2 by coal seam gas injection boring 42, and seal by coal seam gas injection boring and two seal capsules, sealing in the above-mentioned gas marker injection device discharges air chamber and is positioned at seal capsule 2 the place aheads, forms by seal capsule and coal seam gas injection boring, and hole by packoff of gas injection system, No. two packoffs and coal seam gas injection and to seal.Closed chamber 29 in No. two packoffs of recording geometry is between two seal capsules 21,22 of a packoff of recording geometry, form with seal capsule 21,22 by coal seam observation boring 43, and seal by coal seam observation boring and two seal capsules, the sealing of above-mentioned gas marker observation device is drawn air chamber in and is positioned at seal capsule 22 the place aheads, forms by the observation boring of seal capsule and coal seam, and hole by packoff of recording geometry, No. two packoffs and coal seam observation and to seal.
In the aforesaid way, seal capsule in packoff of coal seam gas injection boring and gas injection system is sealed No. two sealing mediums in the closed chamber of No. two packoffs of gas injection system up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam gas injection boring institute, final gas marker is sealed up for safekeeping in sealing release air chamber by one, No. two sealing medium and coal seam gas injection boring; Above-mentioned coal seam observes boring and the seal capsule in packoff of recording geometry seal No. two sealing mediums in the closed chamber of No. two packoffs of recording geometry up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam observation boring institute, final gas marker by one, No. two sealing medium and coal seam observation boring seal in sealing gathering air chamber.
In the aforesaid way, discharge air chamber or seal pressure and the flow that draws air chamber in by pressure generator, pressure maintaining valve, pressure gauge, flowmeter, one, No. two sealing medium of unidirectional stop valve control and sealing in above-mentioned gas injection system or the recording geometry, and make the pressure of one, No. two sealing medium discharge air chamber or seal the pressure that draws air chamber in, form sealing greater than sealing.
In the aforesaid way, gas marker gas collection measurement apparatus adopts drainage to collect gas marker.
Method below in conjunction with permeability quick gas in a kind of coal seam is surveyed is described further above-mentioned test unit again:
Enter (going back to) air way coal seam 41 at workplace and compose and deposit stable area arrangements and survey the district, be furnished with a coal seam gas injection boring 42 and several coal seams observation boring 43 in surveying the district, the aperture of above-mentioned boring, the hole is long, the inclination angle can be according to concrete coal seam geological condition design.
After the success of gas injection drilling construction, just can install gas injection system.In boring, send into packoff No. one, utilize pressure-generating device that a sealing medium in sealing medium accumulator is injected seal capsule 1,2, and by flowmeter and the pressure of pressure gauge retainer pressure greater than sealing release air chamber; Equally,, No. two sealing mediums in No. two sealing medium accumulators are injected in the closed chambers, and keep its pressure to discharge the pressure of air chamber, less than the pressure of a packoff greater than sealing by pressure-generating device; After release air chamber to be sealed is sealed, discharges air chamber by gas marker accumulator, pressure maintaining valve, flowmeter, pressure gauge, unidirectional stop valve to sealing again and inject gas marker, and control its flow and pressure in steady state (SS).
The observation boring of above-mentioned coal seam is arranged in distance gas injection boring left and right side 2～10m scope, in order to arrange recording geometry.The sealing means of recording geometry is analogous to the sealing means of gas injection system, after gathering air chamber to be sealed is sealed, detect the blowdown presssure and the flow of gas marker by flowmeter, pressure gauge, unidirectional stop valve, pressure maintaining valve and gas marker collection chamber (gas marker gas collection measurement apparatus).By detecting the flow of recording geometry gas marker of certain cross-sectional area under pressure stable, utilize following formula to try to achieve the interior coal seam permeability of certain limit.
Wherein, Q flows through the flow that cross-sectional area is A for gas marker c; μ is the kinetic viscosity of gas marker c; ρ is the density of gas marker c; G is an acceleration of gravity;
Be the pressure gradient on the flow direction S.
In sum, the invention provides quick gas test experiment device of a kind of coal seam permeability and method, the construction drill of gas injection system and recording geometry is arranged in utilization in the coal seam, in conjunction with test unit provided by the invention and method, the interior on a large scale whole permeance property in fast measuring coal seam, and the differentiation situation of coal seam permeability under the mining influence, be the overall condition of grasping the cracks in coal seam system, and provide technical support for the migration of research gas, cbm development, coal seam water infusion technology.
Should be understood that; above-mentioned description at preferred embodiment is comparatively detailed; can not therefore think restriction to scope of patent protection of the present invention; those of ordinary skill in the art is under enlightenment of the present invention; do not breaking away under the scope situation that claim of the present invention protects; can also make various deformation such as replacement, simple combination, these all fall within protection scope of the present invention, and the scope of asking for protection of the present invention should be as the criterion with claims.
Claims (9)
1. the test unit that permeability quick gas in coal seam is surveyed is characterized in that comprising gas injection system and recording geometry, and wherein gas injection system comprises packoff of gas injection system, No. two packoffs of gas injection system, gas marker injection device; Recording geometry comprises packoff of recording geometry, No. two packoffs of recording geometry, and the gas marker observation device;
In the described gas injection system, packoff of gas injection system comprises that two seal capsules that are interconnected, a pressure-generating device, sealing medium accumulator, high-pressure hose, pressure gauge, a flow take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, a sealing medium accumulator by pipeline, No. one the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is interconnected two by high-pressure hose and has the seal capsule of certain distance to be connected; No. two packoffs of above-mentioned gas injection system comprise that a closed chamber, a pressure-generating device, No. two sealing medium accumulators, high-pressure hose, pressure gauge, flows take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, No. two sealing medium accumulators by pipeline, No. two the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber by high-pressure hose; Above-mentioned gas marker injection device comprises that a sealing discharges air chamber, gas marker accumulator, pressure maintaining valve, high-pressure hose, pressure gauge, flowmeter, unidirectional stop valve, the gas marker accumulator stores enough pressure energies, and by pipeline connection pressure maintaining valve, pressure gauge, flowmeter, unidirectional stop valve, pass through high-pressure hose then, successively pass a seal capsule, closed chamber and another seal capsule, discharge air chamber with sealing at last and be connected, be used for that gas marker is injected sealing with pressure stable and flow and discharge air chamber;
In the described recording geometry, packoff of recording geometry comprises that two seal capsules that are interconnected, a pressure-generating device, sealing medium accumulator, high-pressure hose, pressure gauge, a flow take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, a sealing medium accumulator by pipeline, No. one the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is interconnected two by high-pressure hose and has the seal capsule of certain distance to be connected; No. two packoffs of above-mentioned recording geometry comprise that a closed chamber, a pressure-generating device, No. two sealing medium accumulators, high-pressure hose, pressure gauge, flows take into account unidirectional stop valve, pressure-generating device is connected with pressure gauge, No. two sealing medium accumulators by pipeline, No. two the sealing medium accumulator is connected with unidirectional stop valve, flowmeter by pipeline, and the latter is connected with closed chamber by high-pressure hose; Above-mentioned gas marker observation device comprises a sealing gathering air chamber, gas marker gas collection measurement apparatus, pressure maintaining valve, high-pressure hose, pressure gauge, flow is taken into account unidirectional stop valve, sealing is drawn air chamber in and is successively passed a seal capsule by high-pressure hose, closed chamber and another seal capsule, link to each other with gas marker gas collection measurement apparatus at last, drawing air chamber in by sealing collects from the gas marker that passes the coal seam of above-mentioned sealing release air chamber direction, and the gas marker of collecting is pooled in the gas marker gas collection measurement apparatus with certain pressure, measure the flow and the concentration of collected gas marker simultaneously, use in order to measuring the coal seam permeability.
2. the test unit that permeability quick gas in coal seam according to claim 1 is surveyed, it is characterized in that: in packoff of described gas injection system and packoff of recording geometry, pressure-generating device is transmitted to a sealing medium in the sealing medium accumulator by pipeline No. one with the pressure energy that produces in each packoff, and injects the media quantity of two seal capsules by pressure gauge, sealing medium of flowmeter control; In No. two packoffs of described gas injection system and No. two packoffs of recording geometry, pressure-generating device is transmitted to No. two sealing mediums in the sealing medium accumulator by pipeline No. two with the pressure energy that produces in each No. two packoff, and injects the media quantity of closed chamber by pressure gauge, No. two sealing mediums of flowmeter control.
3. the test unit that permeability quick gas in coal seam according to claim 1 is surveyed, it is characterized in that: a described sealing medium is preferably water, and No. two sealing medium is preferably emulsion, and gas marker is a spike gas, is preferably SF
6, CO
2Or Br
2
4. the test unit that permeability quick gas in coal seam according to claim 1 is surveyed, it is characterized in that: the closed chamber in No. two packoffs of described gas injection system is between two seal capsules of a packoff of gas injection system, form by coal seam gas injection boring and seal capsule, and seal by coal seam gas injection boring and two seal capsules, sealing in the described gas marker injection device discharges air chamber and is positioned at seal capsule the place ahead, form by seal capsule and coal seam gas injection boring, and by packoff of gas injection system, No. two packoffs and coal seam gas injection boring seal; Closed chamber in No. two packoffs of described recording geometry is between two seal capsules of a packoff of recording geometry, form with seal capsule by coal seam observation boring, and seal by coal seam observation boring and two seal capsules, the sealing of described gas marker observation device is drawn air chamber in and is positioned at seal capsule the place ahead, forms by the observation boring of seal capsule and coal seam, and hole by packoff of recording geometry, No. two packoffs and coal seam observation and to seal.
5. the test unit that permeability quick gas in coal seam according to claim 4 is surveyed, it is characterized in that: the seal capsule in packoff of gas injection boring of described coal seam and gas injection system is sealed No. two sealing mediums in the closed chamber of No. two packoffs of gas injection system up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam gas injection boring institute, final gas marker is sealed up for safekeeping in sealing release air chamber by one, No. two sealing medium and coal seam gas injection boring; Above-mentioned coal seam observes boring and the seal capsule in packoff of recording geometry seal No. two sealing mediums in the closed chamber of No. two packoffs of recording geometry up for safekeeping, and two seal capsules that are full of a sealing medium that are interconnected also simultaneously in the sealed chamber No. two sealing mediums seal up for safekeeping with coal seam observation boring institute, final gas marker by one, No. two sealing medium and coal seam observation boring seal in sealing gathering air chamber.
6. the test unit that permeability quick gas in coal seam according to claim 5 is surveyed, it is characterized in that: discharge air chamber or seal pressure and the flow that draws air chamber in by pressure generator, pressure maintaining valve, pressure gauge, flowmeter, one, No. two sealing medium of unidirectional stop valve control and sealing in described gas injection system or the recording geometry, and make the pressure of one, No. two sealing medium discharge air chamber or seal the pressure that draws air chamber in, form sealing greater than sealing.
7. the test unit that permeability quick gas in coal seam according to claim 1 is surveyed is characterized in that: described gas marker gas collection measurement apparatus adopts drainage to collect gas marker.
8. the method surveyed of the quick gas of a coal seam permeability is characterized in that may further comprise the steps:
Step 1, survey the district at colliery mining face under mine air intake or the stable area arrangements of return airway ocurrence of coal seam, in surveying the district, be furnished with a coal seam gas injection boring, the coal seam observation boring that some spacing unequal lengths differ, the parallel axes or the almost parallel of coal seam gas injection boring and coal seam observation boring;
Step 2 forms sealing and discharges air chamber in coal seam gas injection boring, and gas marker injection sealing is discharged air chamber, and gas marker is permeated in the coal seam; In the observation boring of coal seam, form sealing and draw air chamber in, collect from the gas marker that oozes out the coal seam of above-mentioned sealing release air chamber direction, and the gas marker of collecting effluxed, simultaneously the gas marker of discharging is detected, use in order to measuring the coal seam permeability.
9. the method that permeability quick gas in coal seam according to claim 8 is surveyed, it is characterized in that: in the described step 2, utilize gas injection system to discharge the gas marker that air chamber injects certain pressure to sealing, utilize the sealing in the recording geometry to draw air chamber collection gas marker in subsequently, and outwards discharge with fixed pressure, detect concentration and the flow that effluxes gas marker simultaneously, utilize the concentration of coal seam permeability, gas marker and the relation between the flow, obtain the permeability in coal seam.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102996179A (en) * | 2012-11-26 | 2013-03-27 | 安徽理工大学 | Detection method of air leakage of roof of coal seam |
| CN103115843A (en) * | 2012-12-26 | 2013-05-22 | 中国人民解放军63653部队 | In situ measurement method for rock mass gas permeability |
| CN103196785A (en) * | 2013-04-26 | 2013-07-10 | 张金川 | Gas rapid measuring analysis mete and measuring method thereof |
| CN103471977A (en) * | 2013-09-25 | 2013-12-25 | 湖南科技大学 | Detection system and detection method for detecting gas permeability of coal gangue fill |
| CN103940723A (en) * | 2014-05-05 | 2014-07-23 | 山东科技大学 | Method for quickly determining permeability of working surface front coal body of underground coal mine in lab |
| CN104345022A (en) * | 2013-07-30 | 2015-02-11 | 河南煤业化工集团研究院有限责任公司 | Method for directly testing permeability of underground coal seam |
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| CN105136609A (en) * | 2015-08-05 | 2015-12-09 | 中国石油天然气股份有限公司 | Method and apparatus for measuring coal bed gas well produced fluid coal powder mass percentage concentration |
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| CN111551475A (en) * | 2020-04-07 | 2020-08-18 | 重庆大学 | Portable device and method for rapidly testing permeability of coal seam in situ through layer drilling |
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| CN106932328B (en) * | 2017-05-16 | 2023-06-23 | 四川大学 | System and method for testing coal permeability by using trace gas |
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| CN109269955A (en) * | 2018-09-29 | 2019-01-25 | 中国矿业大学 | A kind of coal rock layer permeability in-situ testing device and method |
| CN109269955B (en) * | 2018-09-29 | 2023-11-21 | 中国矿业大学 | In-situ testing device and method for permeability of coal stratum |
| CN109682736A (en) * | 2018-12-26 | 2019-04-26 | 河南理工大学 | A kind of method of underground gas injection measurement coal seam anisotropy permeability coefficient |
| CN109738128B (en) * | 2018-12-29 | 2020-10-02 | 中国矿业大学 | Temperature-sensitive material for predicting spontaneous combustion of coal in goaf, preparation method and application |
| CN109738128A (en) * | 2018-12-29 | 2019-05-10 | 中国矿业大学 | For predicting Thermo-sensitive material, the preparation method and application of goaf coal spontaneous combustion |
| CN110056342A (en) * | 2019-04-26 | 2019-07-26 | 徐州工程学院 | A kind of drilling gas injection determines the gas injection device and method of hollow mining feasibility |
| CN110243746A (en) * | 2019-07-01 | 2019-09-17 | 重庆大学 | A kind of device and method of layer-through drilling quick in situ test coal seam permeability |
| WO2021103372A1 (en) * | 2019-11-28 | 2021-06-03 | 山东科技大学 | Mobile rapid coal rock permeability measuring instrument |
| CN111551475A (en) * | 2020-04-07 | 2020-08-18 | 重庆大学 | Portable device and method for rapidly testing permeability of coal seam in situ through layer drilling |
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