CN102830038A - Apparatus and method for rapid determination of parameters of residual gas on mining working face of underground coal mine - Google Patents
Apparatus and method for rapid determination of parameters of residual gas on mining working face of underground coal mine Download PDFInfo
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Abstract
The invention relates to an apparatus and a method for rapid determination of parameters of residual gas on a mining working face of an underground coal mine. The determination apparatus is provided with a coal sample tank; a pneumatic motor is arranged at the lower part of the coal sample tank; a rotating shaft is mounted on the upper part of the pneumatic motor; a crushing cutter head is installed at a side surface of the rotating shaft; the upper part of the coal sample tank is communicated with one end of a gas-guide tube, and the other end of the gas-guide tube is connected with a high precision pressure gauge; a gas stop valve is arranged at a joint position of the gas-guide tube and the coal sample tank; the side surface of the gas-guide tube is communicated with an interface of a three-way angle valve through a connection flexible pipe, and the other two interfaces of the three-way angle valve are respectively communicated with the bottoms of burette I and burette II through connection pipes. The determination method comprises the following steps: determination of curves representing the relationship between different balance pressures during adsorption of methane by coal and desorption quantity and the relationship between the different balance pressures and methane content; determination of desorbable gas quantity on the working face and calculation of content, pressure and expansion energy of residual gas on the mining working face. The determination method for residual gas on the mining working face has the advantages of a short period of time, small workload and high reliability of determination results, provides multi-parameter determination indexes for prediction of prominent dangers and examination of outburst prevention effects and has significant meaning to development of outburst prevention technology on a working face.
Description
Technical field
The present invention relates to a kind of method of measuring the remaining gas parameter of getting working face under the coal mine, but down-hole fast measuring getting working face coal seams gas discharging quantity and accurately draw the device and method of the remaining gas parameter of fast measuring getting working face under the coal mine of workplace gas remainder quantity, remaining gas pressure and remaining gas expansion energy through analytical calculation especially.
Background technology
Along with the extension of the pit mining degree of depth, most mines are changed to high gas even projecting mine by gaseous mine gradually, and gas has become one of principal element of restriction mining area development." the outstanding regulation of control coal and gas " requirement, projecting mine should carry out regional outburst hazard and predicts projecting coal bed according to coal-bed gas pressure or gas bearing capacity; And these confirm effective index and method should to adopt remaining gas pressure, gas remainder quantity when requiring the exploitation area of coal mining face with potential outburst danger, carry out outburst hazard prediction and validity check.Can therefore, rapid and accurate determination go out workplace gas remainder quantity and remaining gas pressure have become the key point of outburst danger prediction and validity check.Existing present coal seam gas-bearing capacity assay method mainly contains two types of direct method and indirect methods.Direct method measure at first will the down-hole carry out coal sample pulverize before the on-site measurement of natural coal seams gas discharging quantity, the natural coal seams gas discharging quantity after sending the laboratory to pulverize coal sample then and the mensuration of residual gas amount; Indirect method mensuration need be surveyed the coal output layer gas pressure in the down-hole, and requires to carry out in the laboratory mensuration of absorption constant (a, b value), porosity and industrialness analytical parameters.It is big that above-mentioned two kinds of methods are measured workload, needs the time long, and it is poor to measure result reliability; Particularly at getting working face because the restriction of tested press seal hole condition can't accurately determine the remaining gas pressure in coal seam.
Summary of the invention
In order to solve the problem that existing assay method can't accurately determine the remaining gas pressure in coal seam; The present invention provides the device and method of the remaining gas parameter of fast measuring getting working face under a kind of coal mine; This method through the isothermal desorption experiment of coal, is tried to achieve different different with coal adsorbed methane equalized pressures with desorption quantity curve fitting equation of equalized pressure of coal adsorbed methane and methane content curve fitting equation in the laboratory in advance; When prediction of getting working face outburst hazard or protrusion-dispelling validity check; But utilize down-hole fast measuring device to determine the getting working face coal seams gas discharging quantity, accurately calculate workplace again and measure the gas remainder quantity in place, remaining gas pressure and three gas parameters of remaining watt phase expansion energy; This method mensuration gas needed time of parameter is short, workload is little, influence factor is few, it is high to measure result reliability; And be applicable to same coal seam getting working face multiple spot fast measuring; For workplace outburst hazard prediction and protrusion-dispelling validity check provide multiparameter judgement index; Have higher reliability and security, significant to the development of workplace protrusion-dispelling technology.
The technical solution adopted for the present invention to solve the technical problems is: try to achieve different different with coal adsorbed methane equalized pressures with desorption quantity curve fitting equation of equalized pressure of coal adsorbed methane and methane content curve fitting equation in advance in the laboratory; But utilize down-hole fast measuring device to determine the getting working face coal seams gas discharging quantity again, solve the remaining gas parameter of workplace through accurate calculating at last.
Down-hole fast measuring device is provided with the coal sample jar of a tubular, and the outside of coal sample jar is provided with the housing that shields, and the bottom of coal sample jar is fixed with air motor; The top coupling of air motor is equipped with turning axle; The side of turning axle evenly misplaces from top to bottom and is provided with the pulverizing cutter head, and the top of coal sample jar is being communicated with an end of wireway, and the other end of wireway is connecting the high-precision pressure table; The interface of wireway and coal sample jar is provided with the gas stop valve; The side of wireway is connected with an interface of threeway angle valve through connecting flexible pipe, and two other interface of threeway angle valve is connected through the bottom of connecting pipe with buret I and buret II respectively, in addition; The bottom of buret I and buret II communicates with tank through connecting pipe simultaneously, and the upper side of buret I and buret II is provided with drain tap.
(1) the different equalized pressures of coal adsorbed methane and desorption quantity and methane content curve determination
Get the fresh coal sample of workplace in the down-hole and send the laboratory, at first measure the pseudodensity produce coal, then the coal sample of some is pulverized, take by weighing coaling appearance jar of granularity 0.25mm～0.18mm coal sample 42g～45g, adopt the high pressure content method to carry out the isothermal desorption experiment of coal.Require during experiment the coal sample jar fill high pressure methane be placed on treat coal sample adsorbed methane balance more than the 6h in 30 ℃ of water baths after, whenever then open the coal sample tank valve at a distance from 4h, emit a part of methane and get into buret.Read coal sample jar methane pressure earlier before each venting, buret salt discharge water volume in record venting back is noted environment atmospheric pressure and temperature simultaneously again.Then can find the solution different different with coal adsorbed methane equalized pressures with desorption quantity curve fitting equation of equalized pressure of the adsorbed methane that produces coal and methane content curve fitting equation according to above-mentioned data recorded, concrete data handling procedure can be with reference to MT/T752-1997.
The curve fitting equation that try to achieve in above-mentioned laboratory can repeat to utilize when prediction of workplace outburst hazard and validity check, has convenience preferably.
(2) but the workplace coal seams gas discharging quantity measure
During mensuration, at first drill through the coal sample that workplace is measured the place, when boring is drilled into predetermined depth, pick up counting, the fresh coal sample that collects is packed into rapidly to be sealed in the coal sample jar; Link to each other with draining gas collection buret I the coal sample jar with the buret II through connecting flexible pipe, open the gas stop valve, whenever write down the water discharge of draining gas collection buret I and buret II then, require record more than 30 minutes at a distance from one minute.Treat that water discharge changes when not obvious, again the coal sample jar be placed on the draw-in groove of air motor that the air valve utilization of opening air motor is pulverized cutter head coal sample in the coal sample jar is pulverized; When the water discharge of treating draining gas collection buret I and buret II does not have significant change, record water discharge reading, weigh coal sample then and write down weight after mensuration work can finish.But time, water discharge data and coal sample weight through above-mentioned record then can calculate the getting working face coal seams gas discharging quantity.
(3) getting working face gas remainder quantity, pressure and expansion energy size are calculated
The face gas cubage: utilizing the pressure solve and desorption quantity curve fitting equation to extrapolate the workplace normal pressure can not coal seams gas discharging quantity; But can not the coal seams gas discharging quantity addition with the workplace coal seams gas discharging quantity that records and normal pressure, then can try to achieve face gas content.
Face gas calculation of pressure:, can try to achieve face gas pressure size through inverse with pressure and the methane content curve fitting equation that the substitution of face gas content solves.
The face gas expansion energy calculates: but according to aforementioned coal seams gas discharging quantity that obtains and gas pressure, carry out analytical calculation through the expansion energy computing formula, then can try to achieve the expansion energy size.
In the formula: w-gas expansion energy, J/kg;
p
0-subsurface environment atmospheric pressure is read Mpa by coal sample jar upward pressure table;
But the v-coal seams gas discharging quantity, m
3/ kg;
N-gas adiabatic exponent gets 1.31;
P-gas pressure, Mpa.
The invention has the beneficial effects as follows; This remaining gas needed time of parameter of method mensuration workplace is short, workload is little, influence factor is few, it is high to measure result reliability; And be applicable to same coal seam getting working face multiple spot fast measuring; Judge index for workplace outburst hazard prediction and protrusion-dispelling validity check provide multiparameter, have higher reliability and security, the development technological to the workplace protrusion-dispelling is significant.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the structural principle synoptic diagram of device according to the invention.
Fig. 2 is the principle flow chart of assay method according to the invention.
Fig. 3 is the desorption quantity and the methane content computation process of coal under the different equalized pressures.
Fig. 4 is the desorption quantity graph of relation of equalized pressure and coal.
Fig. 5 is the methane content graph of relation of equalized pressure and coal.
Fig. 6 is the remaining firedamp testing result signal of the different gaging hole degree of depth of crossheading on 11071.
Among the figure, 1. buret I, 2. buret II, 3. drain tap, 4. tank, 5. threeway angle valve, 6. high-precision pressure table, 7. gas stop valve, 8. the coal sample jar is 9. pulverized cutter head, 10. housing, 11. air motors, 12. connect flexible pipes.
Embodiment
In the drawings; This determinator is provided with the coal sample jar 8 of a tubular, and the outside of coal sample jar 8 is provided with the housing 10 that shields, and the bottom of coal sample jar 8 is fixed with air motor 11; The top coupling of air motor 11 is equipped with turning axle; The side of turning axle evenly misplaces to be provided with from top to bottom and pulverizes cutter head 9, and the top of coal sample jar 8 is being communicated with an end of wireway, and the other end of wireway is connecting high-precision pressure table 6; The interface of wireway and coal sample jar 8 is provided with gas stop valve 7; The side of wireway is connected with an interface of threeway angle valve 5 through connecting flexible pipe 12, and two other interface of threeway angle valve 5 is connected through the bottom of connecting pipe with buret I 1 and buret II 2 respectively, in addition; The bottom of buret I 1 and buret II 2 communicates with tank 4 through connecting pipe simultaneously, and the upper side of buret I 1 and buret II 2 is provided with drain tap 3.
The step of the remaining gas parameter of getting working face mainly comprises the different equalized pressures of coal adsorbed methane and desorption quantity and methane content curve determination, the workplace coal seams gas discharging quantity measures and getting working face gas remainder quantity, pressure and expansion energy size are calculated but this assay method is measured.
(1) the different equalized pressures of coal adsorbed methane and desorption quantity and methane content curve determination
Get the fresh coal sample of workplace in the down-hole and send the laboratory, at first measure the pseudodensity produce coal, then the coal sample of some is pulverized, take by weighing coaling appearance jar of granularity 0.25mm～0.18mm coal sample 42g～45g, adopt the high pressure content method to carry out the isothermal desorption experiment of coal.Require during experiment the coal sample jar fill high pressure methane be placed on treat coal sample adsorbed methane balance more than the 6h in 30 ℃ of water baths after, whenever then open the coal sample tank valve at a distance from 4h, emit a part of methane and get into buret.Read coal sample jar methane pressure earlier before each venting, buret salt discharge water volume in record venting back is noted environment atmospheric pressure and temperature simultaneously again.Then can find the solution different different with coal adsorbed methane equalized pressures with desorption quantity curve fitting equation of equalized pressure of the adsorbed methane that produces coal and methane content curve fitting equation according to above-mentioned data recorded, concrete data handling procedure can be with reference to MT/T752-1997.
The curve fitting equation that try to achieve in above-mentioned laboratory can repeat to utilize when prediction of workplace outburst hazard and validity check, has convenience preferably.
(2) but the workplace coal seams gas discharging quantity measure
During mensuration, at first drill through the coal sample that workplace is measured the place, when boring is drilled into predetermined depth, pick up counting, with the fresh coal sample that the collects sealing in the coal sample jar 8 of packing into rapidly; Link to each other with draining gas collection buret I 1 coal sample jar 8 with buret II 2 through connecting flexible pipe 12, open gas stop valve 7, whenever write down the water discharge of draining gas collection buret I 1 and buret II 2 then, require record more than 30 minutes at a distance from one minute.Treat that water discharge changes when not obvious, again coal sample jar 8 be placed on the draw-in groove of air motor 11 that the air valve utilization of opening air motor 11 is pulverized in 9 pairs of coal sample jars 8 of cutter head coal sample and pulverized; When the water discharge of treating draining gas collection buret I 1 and buret II 2 does not have significant change, record water discharge reading, weigh coal sample then and write down weight after mensuration work can finish.But time, water discharge data and coal sample weight through above-mentioned record then can calculate the getting working face coal seams gas discharging quantity.
(3) getting working face gas remainder quantity, pressure and expansion energy size are calculated
The face gas cubage: utilizing the pressure solve and desorption quantity curve fitting equation to extrapolate the workplace normal pressure can not coal seams gas discharging quantity; But can not the coal seams gas discharging quantity addition with the workplace coal seams gas discharging quantity that records and normal pressure, then can try to achieve face gas content.
Face gas calculation of pressure:, can try to achieve face gas pressure size through inverse with pressure and the methane content curve fitting equation that the substitution of face gas content solves.
The face gas expansion energy calculates: but according to aforementioned coal seams gas discharging quantity that obtains and gas pressure, carry out analytical calculation through the expansion energy computing formula, then can try to achieve the expansion energy size.
In the formula: w-gas expansion energy, J/kg;
p
0-subsurface environment atmospheric pressure is read Mpa by coal sample jar upward pressure table;
But v-coal seams gas discharging quantity, m
3/ kg;
N-gas adiabatic exponent gets 1.31;
P-gas pressure, Mpa.
The specific embodiment of this invention is:
Colliery, prosperous imperial Coal Industry Group Longshan, Anyang is positioned at hydrometallurgy town, Anyang County, Henan Province, designed [underground 500,000 t/a, main 21 coal seams of adopting.21 ocurrences of coal seam are the group bottom in Shanxi, compose deposit absolute altitude+130.00～-510.00m, buried depth 30.00～680.00m, thickness of coal seam 0.08～10.63m, average thick 5.21m.Longshan Mine is a coal and gas outburst mine, coal and gas has once taken place outstanding 111 times since the self-built ore deposit, and maximum is once outstanding to be occurred in when cutting the eye driving in 6 days 13081 April in 1999, and intensity of outburst is 1070t, ejection gas amount 167435m
3
Crossheading carried out gob-side entry driving on Longshan Mine began 11071 in October, 2011; For preventing the generation of outstanding accident, China Mining University is studied crossheading gob-side entry driving outburst hazard on 11071 through using the remaining gas parameter of workplace rapid assay methods.
1.11071 last crossheading coal sample laboratory isothermal desorption experiment
Crossheading is got fresh coal sample and is sent the laboratory on 11071, and the pseudodensity that application density appearance records coal is 1.45g/cm
3Adopt the high pressure content method to carry out the isothermal desorption experiment of 30 ℃ of following coals then, it is as shown in Figure 3 that experiment records the pairing discharge quantity data of the different equalized pressures of coal adsorbed methane.
Because pairing discharge quantity comprises free methane discharge quantity three parts of the desorb discharge quantity and the coal of coal sample jar dead space discharge quantity, coal under the different equalized pressures.Therefore, find the solution the desorb of coal, should coal sample jar dead space discharge quantity be deducted when comprising the free methane discharge quantity of coal.Coal sample jar dead-volume size adopts following formula to calculate:
V
s=Vg-Vm
V
m=G/ARD
V in the formula
s-coal sample jar dead space, cm
3
Vg-coal sample tank volume, cm
3
Vm-coal sample volume, cm
3
G-coal sample weight, g;
ARD-coal sample pseudodensity, g/cm
3
In addition, when calculating the desorb discharge quantity of coal, should be taken into account the influence of the compressibility coefficient and the experimental situation pressure and temperature of methane.
Desorption quantity data to pairing unit mass coal under the different equalized pressures among Fig. 3 are carried out match, can try to achieve the desorption quantity relation curve fit equation of equalized pressure and coal, and are as shown in Figure 4.
Different equalized pressures of the coal adsorbed methane that utilization solves and desorption quantity relation curve fit equation:
Q
j=1.2528P
2+2.2888P+2.231
Q in the formula
jThe desorption quantity of coal under the-different equalized pressures, ml/g;
P-coal absorption methane equalized pressure, MPa.
If imagination when equalized pressure when normal pressure 0.101325MPa is decreased to 0MPa; Then can extrapolate normal pressure according to following formula can not coal seams gas discharging quantity be 2.476ml/g; Therefore; Can further try to achieve the methane content and the match relation curve equation of pairing unit mass coal under the different equalized pressures, like Fig. 3 and shown in Figure 5.
2.11071 but last crossheading remnants coal seams gas discharging quantity is measured
Lane group has arranged 5 gaging holes under crossheading on 11071, but use fire damp desorb determinator the remnants coal seams gas discharging quantity of 5 gaging hole different depths is measured, and it is as shown in Figure 6 to measure the result.
3.11071 last crossheading gas remainder quantity, pressure and expansion energy calculate
According to crossheading normal pressure on 11071 can not desorption quantity be 2.476ml/g, but can not the desorption quantity addition with the coal seams gas discharging quantity that records and normal pressure, can try to achieve the gas remainder quantity of each gaging hole different depth of crossheading on 11071, as shown in Figure 6.
Utilize the methane content relation curve fit equation of equalized pressure and coal:
Q
h=-0.6119P
2+10.266P+3.8324
Q in the formula
hThe methane content of coal under the-different equalized pressures, ml/g;
P-coal absorption methane equalized pressure, MPa.
But inverse goes out the remaining gas pressure of each gaging hole different depth of crossheading on 11071, and is as shown in Figure 6.
Utilize gas expansion energy computing formula:
In the formula: w-gas expansion energy, J/kg;
p
0-subsurface environment atmospheric pressure is read Mpa by coal sample jar upward pressure table;
But the v-coal seams gas discharging quantity, m
3/ kg;
N-gas adiabatic exponent gets 1.31;
P-gas pressure, Mpa.
Can try to achieve the remaining gas expansion energy of each gaging hole different depth of crossheading on 11071.
Can be known that by Fig. 6 crossheading is apart from lane group depth capacity 22m place on 11071, maximum gas remainder quantity is 6.31ml/g, less than 8ml/g; Maximum remaining gas relative pressure is 0.12, less than 0.74MPa; Maximum remaining gas expansion energy is 252.16KJ/Kg.Therefore, can think on 11071 that crossheading is in contiguous workplace and adopts and unload in the pressure zone scope, gob-side entry driving does not have outburst hazard.
Claims (4)
1. the device and method of the remaining gas parameter of fast measuring getting working face under the coal mine, this determinator is provided with the coal sample jar (8) of a tubular, and the outside of coal sample jar (8) is provided with the housing (10) that shields; It is characterized in that: the bottom of coal sample jar (8) is fixed with air motor (11); The top coupling of air motor (11) is equipped with turning axle; The side of turning axle evenly misplaces from top to bottom to be provided with and pulverizes cutter head (9); The top of coal sample jar (8) is being communicated with an end of wireway; The other end of wireway is connecting high-precision pressure table (6), and the interface of wireway and coal sample jar (8) is provided with gas stop valve (7), and the side of wireway is connected with an interface of threeway angle valve (5) through connecting flexible pipe (12); Two other interface of threeway angle valve (5) is connected through the bottom of connecting pipe with buret I (1) and buret II (2) respectively; In addition, the bottom of buret I (1) and buret II (2) communicates with tank (4) through connecting pipe simultaneously, and the upper side of buret I (1) and buret II (2) is provided with drain tap (3);
The step of the remaining gas parameter of getting working face mainly comprises the different equalized pressures of coal adsorbed methane and desorption quantity and methane content curve determination, the workplace coal seams gas discharging quantity measures and getting working face gas remainder quantity, pressure and expansion energy size are calculated but this assay method is measured.
2. the different equalized pressures of coal adsorbed methane according to claim 1 and desorption quantity and methane content curve determination; It is characterized in that: get the fresh coal sample of workplace in the down-hole and send the laboratory; At first measure the pseudodensity produce coal, then the coal sample of some is pulverized, take by weighing coaling appearance jar of granularity 0.25mm～0.18mm coal sample 42g～45g; Adopt the high pressure content method to carry out the isothermal desorption experiment of coal; Require during experiment the coal sample jar fill high pressure methane be placed on treat coal sample adsorbed methane balance more than the 6h in 30 ℃ of water baths after, whenever then open the coal sample tank valve slowly at a distance from 4h, emit a part of methane and get into buret; Read coal sample jar methane pressure earlier before each venting, buret salt discharge water volume in record venting back is noted environment atmospheric pressure and temperature simultaneously again; Then can find the solution different different with coal adsorbed methane equalized pressures with desorption quantity curve fitting equation of equalized pressure of the adsorbed methane that produces coal and methane content curve fitting equation according to above-mentioned data recorded, specifically data handling procedure can be with reference to MT/T752-1997,
The curve fitting equation that try to achieve in above-mentioned laboratory can repeat to utilize when prediction of workplace outburst hazard and validity check, has convenience preferably.
3. but workplace coal seams gas discharging quantity according to claim 1 is measured; It is characterized in that: during mensuration, at first drill through the coal sample that workplace is measured the place, when boring is drilled into predetermined depth, pick up counting, the fresh coal sample that collects is packed into rapidly, and coal sample jar (8) is middle to be sealed; Link to each other with draining gas collection buret I (1) coal sample jar (8) with buret II (2) through connecting flexible pipe (12); Open gas stop valve (7); Whenever write down the water discharge of draining gas collection buret I (1) and buret II (2) then at a distance from one minute, require record more than 30 minutes; Treat that water discharge changes when not obvious, again coal sample jar (8) be placed on the draw-in groove of air motor (11) that the air valve utilization of opening air motor (11) is pulverized cutter head (9) coal sample in the coal sample jar (8) is pulverized; When the water discharge of treating draining gas collection buret I (1) and buret II (2) does not have significant change, record water discharge reading, weigh coal sample then and write down weight after mensuration work can finish; But time, water discharge data and coal sample weight through above-mentioned record then can calculate the getting working face coal seams gas discharging quantity.
4. getting working face gas bearing capacity according to claim 1, pressure and expansion energy size are calculated; It is characterized in that: the face gas cubage: utilizing the desorption of mash gas curve fitting equation solve to extrapolate the workplace normal pressure can not coal seams gas discharging quantity; But can not the coal seams gas discharging quantity addition with the workplace coal seams gas discharging quantity that records and normal pressure, then can try to achieve face gas content;
Face gas calculation of pressure:, can try to achieve face gas pressure size through inverse with face gas content substitution desorption of mash gas curve fitting equation;
The face gas expansion energy calculates: but according to aforementioned coal seams gas discharging quantity that obtains and gas pressure, carry out analytical calculation through the expansion energy computing formula, then can try to achieve the expansion energy size;
In the formula:---gas expansion energy;
-subsurface environment atmospheric pressure is read by coal sample jar upward pressure table;
But-coal seams gas discharging quantity;
-gas adiabatic exponent gets 1.31;
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| CN103411868B (en) * | 2013-07-25 | 2015-10-28 | 陕西煤业化工技术研究院有限责任公司 | A kind of method of testing of Permeability Coefficent in Coal Seam |
| CN103411868A (en) * | 2013-07-25 | 2013-11-27 | 陕西煤业化工技术研究院有限责任公司 | Measuring method for coal seam gas permeability coefficient |
| CN106885755A (en) * | 2017-01-10 | 2017-06-23 | 中国矿业大学 | A kind of underground coal mine quickly determines the method and apparatus of coal-bed gas parameter |
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| CN108458951A (en) * | 2018-04-02 | 2018-08-28 | 河南理工大学 | The method that coal seam gas-bearing capacity is quickly determined by desorption efficiency |
| CN108318375A (en) * | 2018-04-08 | 2018-07-24 | 河南理工大学 | Circulating desorption of mash gas device and its assay method |
| CN108318375B (en) * | 2018-04-08 | 2023-09-19 | 河南理工大学 | Circulating gas desorption device and measuring method thereof |
| CN108693069A (en) * | 2018-08-13 | 2018-10-23 | 中煤科工集团重庆研究院有限公司 | Drilling coal dust gas desorption characteristic parameter measurement while drilling device |
| CN108693069B (en) * | 2018-08-13 | 2021-01-01 | 中煤科工集团重庆研究院有限公司 | Drilling coal dust gas desorption characteristic parameter measurement while drilling device |
| CN109883878A (en) * | 2019-03-05 | 2019-06-14 | 重庆大学 | A kind of water bath with thermostatic control fire damp desorption measurement device and its measuring method |
| CN109900592A (en) * | 2019-03-29 | 2019-06-18 | 平安煤炭开采工程技术研究院有限责任公司 | Test device for desorption |
| CN110470510A (en) * | 2019-08-26 | 2019-11-19 | 贵州大学 | A kind of acquisition tank with gas bearing capacity measurement |
| CN110542623A (en) * | 2019-09-24 | 2019-12-06 | 中国矿业大学 | Automatic measuring device and method for gas content of coal seam in coal mine |
| CN110726640A (en) * | 2019-11-18 | 2020-01-24 | 中煤能源研究院有限责任公司 | Automatic determination device for coal sample gas adsorption constant |
| CN110726640B (en) * | 2019-11-18 | 2022-05-17 | 中煤能源研究院有限责任公司 | Automatic determination device for coal sample gas adsorption constant |
| CN112483075A (en) * | 2020-12-08 | 2021-03-12 | 河南理工大学 | Water invasion drilling gas pressure detection device and method |
| CN112483075B (en) * | 2020-12-08 | 2023-09-12 | 河南理工大学 | Water-immersed borehole gas pressure detection device and method |
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