CN104500010A - Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection - Google Patents
Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection Download PDFInfo
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- CN104500010A CN104500010A CN201410839124.9A CN201410839124A CN104500010A CN 104500010 A CN104500010 A CN 104500010A CN 201410839124 A CN201410839124 A CN 201410839124A CN 104500010 A CN104500010 A CN 104500010A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000003245 coal Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 title claims abstract description 11
- 239000007924 injection Substances 0.000 title claims abstract description 11
- 238000005065 mining Methods 0.000 title abstract 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 11
- 239000010425 asbestos Substances 0.000 claims abstract description 9
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims description 59
- 238000005086 pumping Methods 0.000 claims description 30
- 238000005553 drilling Methods 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 238000004880 explosion Methods 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 5
- 239000008236 heating water Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005012 migration Effects 0.000 claims description 4
- 238000013508 migration Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000036760 body temperature Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 86
- 230000008033 biological extinction Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 208000035208 Ring chromosome 20 syndrome Diseases 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
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- 230000035699 permeability Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- 241000222640 Polyporus Species 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to a device and a method for displacing, exhausting and mining coal seam gas by damp and hot water injection. The device comprises a high and low pressure water injection device, a high-pressure-resistant explosion-proof heating device and a gas exhausting and mining device, wherein the high and low pressure water injection device comprises a water storage tank, a water pump motor, a flow meter, a high-pressure water pump and a high-pressure water pipe; the high-pressure-resistant explosion-proof heating device comprises an explosion-proof shell, a heating module, a control circuit board, ceramic asbestos filling and a quick coupler; the gas exhausting and mining device comprises a main pipe for exhausting and mining, an exhausting and mining hose and an exhausting and mining branch pipe. According to the whole device, the purposes of coal seam gas displacement by injection of high-temperature water and superheated water under high or low pressure, coal body temperature and moisture increasing and gas exhausting and mining efficiency improvement can be realized, mine and gas outburst prevention and cure and dust prevention can be integrated, and the device is simple to operate. Especially for a low-permeability coal seam or situations that gas content is high after the coal seam is exhausted and mined for a period of time and the gas is difficult to exhaust and mine, purposes that the gas content of the coal seam of an exhausting and mining area can be quickly lowered and the outburst is eliminated in short time can be realized.
Description
Technical field
The present invention relates to the device and method of a kind of damp and hot displacement in flooding and draining coal seam gas, be particularly useful for low air permeability coal seam or coal seam in the high situation of extraction a period of time after gas content, can realize fast reducing extraction regional coal-seam gas bearing capacity, in the short time, reaching extinction object.
Background technology
Coal and gas prominent is one of the most serious disaster in colliery, coal and gas prominent mainly due to the unexpected broken coal of geostatic stress, in gas can the result of unexpected release.Coal body genus polyporus structure fragility object, among the hole that gas molecule is present in coal with adsorbed state and free state and crack, facts have proved, along with coal body moisture content increases, the flexibility decrease of coal, plasticity strengthens, and gas diffusion initial speed △ P declines, when moisture content reaches more than 4%, coal seam just loses outburst hazard.Therefore, to carry out water filling be improve coal body survivability to projecting coal bed, reduces gas rate of release, eliminate the effective measures of coal and gas prominent.Water mainly contains the effect of five aspects to gas in coal seam: 1, displacement effect, coal has certain suction-operated to materials such as water, carbon dioxide, gas, nitrogen, but what adsorption capacity was the strongest is water, next is carbon dioxide, gas again, so water has displacement effect to gas, high temperature water accelerates desorption of mash gas, and displacement efficiency is improved more.2, water is to the dissolution of gas, and test proves, water under elevated pressure conditions, can dissolve part gas; 3, reduce gas rate of release, along with water temperature constantly coal seam diffusion towards periphery, coal temperature declines, and remaining gas pressure reduces, gas rate of release reduction etc.; 4, add coal body plasticity, improve the ability that coal body opposing destroys suddenly; 5, reduce coal dust to fly upward, because of the cementation of water after moistening coal body fragmentation, not easily fly upward in atmosphere, thus reach the object of depositing dust.
Coal and gas outburst prominent controlling regulation requires: " region outburst prevention measures preferential, local prevent outburst measure supplement ", and region measure no matter how, all be unable to do without and to drill enforcement gas pumping to coal seam.The projecting coal bed hard-pumped that substantially all belongs to puts coal seam, and the extraction radius of influence is little, and extraction efficiency is low.When coal-bed gas is extracted into a certain degree, both do not have in having holed gas or gas flow minimum time, part extraction borehole is carried out high pressure injection high temperature water, superheated water operation, due to the often rising 1 DEG C of temperature, coal-bed gas adsorption capacity just reduces by 8%, therefore, when the temperature increases, can in the gas molecule be adsorbed on coal body pore wall obtains, fast desorption, become free gas, under the effect of pressure reduction and seepage flow, accelerate the gas pumping of drainage holes near water injection hole.
Summary of the invention
The object of the invention is on the basis of the anti-reflection measure of existing coal-bed flooding release, add a kind of high pressure resistant explosion-proof heating device, achieve different pressures and different temperatures displacement in flooding coal-bed gas, define the device and method of damp and hot displacement in flooding that manual pressure and water temp. auto-control be integrated and draining coal seam gas, Be very effective, practical.
For achieving the above object, the invention provides the device of a kind of damp and hot displacement in flooding and draining coal seam gas, it is characterized in that: it comprises high-low pressure water filling device, high pressure resistant explosion-proof heating device, gas pumping device, described high-low pressure water filling device comprises water storage box, by the high-pressure hydraulic pump that high-pressure water pipe is connected with water storage box, drive the pump motor of high-pressure hydraulic pump, high-pressure hydraulic pump is provided with pressure-relief valve, described high pressure resistant explosion-proof heating device comprises and is arranged on mutual separated ceramic asbestos charges in explosion-resistant enclosure and control circuit board, heating module is arranged in described ceramic asbestos charges, described heating module is connected with high-pressure hydraulic pump water side by snap joint, the water inlet of heating module is provided with pulse signal flow meter, heating module is provided with thermometer, this pulse signal flow meter is connected with control circuit board with thermometer, control circuit board is connected with power supply by main power line, and the gear of heating module is controlled by control cables, gas pumping device comprises extraction supervisor, the extraction arm being connected at least two extraction flexible pipes on this extraction supervisor and stretching in mash gas pumping drilling, the water side of described heating module is connected with this extraction arm respectively with the extraction flexible pipe of described gas pumping device.
Preferably, described high-pressure water pipe is provided with physical streams gauge.
Preferably, described heating module comprising casting module metal-back, being arranged at least one the S type water pipe cast in module metal-back, for heating heater strip and the magnesia of casting module metal-back and water pipe.
Preferably, the junction of described explosion-resistant enclosure and the water inlet pipe of heating module, control cables, main power line is respectively equipped with silica gel sealing ring and screw seals.
Present invention also offers a kind of method of damp and hot displacement in flooding and draining coal seam gas, the damp and hot displacement in flooding described in employing and the device of draining coal seam gas, comprise the steps:
A, at least 3 borings or utilize existing 3 mash gas pumping drillings of constructing on rock stratum, through coal seam, connect high-pressure water pipe, extraction flexible pipe and extraction arm, and the good mash gas pumping drilling of shutoff, prepare gas pumping;
The water of b, water storage box is connected with high-pressure hydraulic pump by pressure duct, pressurize through high-pressure hydraulic pump, pressure-relief valve can manual adjustments water injection pressure, water under high pressure enters into high pressure resistant explosion-proof heating device by pressure duct again, heated by heating module, if control circuit board can regulate heating water temperature, when entering heating module anhydrous, can realize automatically stopping heating;
C, through the high temperature water of heating module, superheated water to be connected with extraction arm by high-pressure water pipe and to enter in 1 mash gas pumping drilling, high temperature water, superheated water makes coal temperature raise by heat trnasfer, accelerate desorb and the migration of gas in coal body, the gas being in adsorbed state is made to be rapidly converted into free gas, because the borehole temperature of hot-water flooding raises, pressure is relatively high, flowed from high to low by pressure official post gas pressure, in addition the adsorption capacity of coal body to water is greater than the adsorption capacity of coal body to gas, so in the process injecting water, water can enter in the adsorption space of gas, thus replace the position of gas, reach the object of displacement gas, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity, accelerate extinction.
Preferably, after once constructing or when stopping injecting high temperature water, superheated water, remove high-low pressure water filling device and high pressure resistant explosion-proof heating device, boring extraction flexible pipe is heated in water filling extraction supervisor and extraction arm are coupled together, when other extraction borehole is heated, repeat above step.
Advantage of the present invention and beneficial effect:
Owing to have employed technique scheme, the present invention can realize different pressures and different temperatures displacement in flooding coal-bed gas, whole device can reach real-time implementation height pressure injection high temperature water, (temperature is more than 100 DEG C for superheated water, under high pressure position aqueous water, enter in environment under low pressure and become steam) displacement coal-bed gas, increase coal temperature and humidity, improve gas pumping efficiency, realize control coal and gas prominent and dust-proof integratedization, simple to operate, particularly to remain high at extraction a period of time after gas content for low air permeability coal seam or coal seam and be difficult to the situation of extraction, can realize reducing extraction regional coal-seam gas bearing capacity fast, the object of short time extinction, significantly can reduce coal dust simultaneously, ensure workman's production safety.The device pressurization of damp and hot displacement in flooding and draining coal seam gas and water temp. auto-control are integrated, and can prevent heating module dry combustion method; After hot water enters coal body, not only can displacement coal-bed gas, release is anti-reflection coal body, and coal body can be made to heat up, accelerate desorb and the migration velocity of gas, change the effect of the moistening coal body of traditional water filling, define the colliery protrusion-dispelling technical measures that displacement in flooding-intensification coal body-quickening desorb and seepage flow are integrated.This device and method can effectively reduce gas bearing capacity in extraction borehole region, reach the object of extinction fast, is a technological innovation for Safety of Coal Mine Production, for control of coalmine gas technology from now on adds again a new behave.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention uses.
Fig. 2 is the structural representation of high pressure resistant explosion-proof heating device.
Fig. 3 is heating module internal construction schematic diagram.
In figure: high-low pressure water filling device-1, high pressure resistant explosion-proof heating device-2, gas pumping device-3, water storage box-4, high-pressure water pipe-5, physical streams gauge-6, pump motor-7, high-pressure hydraulic pump-8, extraction supervisor-9, extraction flexible pipe-10, extraction arm-11, gas-12, mash gas pumping drilling-13, heating module-14, explosion-resistant enclosure-15, pottery asbestos charges-16, control circuit board-17, pulse signal flow meter-18, snap joint-19, silica gel sealing ring-20, screw-21, pressure-relief valve-22, control cables-23, rock stratum-24, coal seam-25, main source line-26, heater strip-27, magnesia-28, casting module metal-back-29, water pipe-30.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:
As shown in Figure 1: the device and method that the invention provides a kind of damp and hot displacement in flooding and draining coal seam gas, device comprises high-low pressure water filling device 1, high pressure resistant explosion-proof heating device 2, gas pumping device 3; High-low pressure water filling device 1 can realize height setting-out and freely switch, and can realize water injection pressure 0 ~ 20MPa, comprise water storage box 4, high-pressure water pipe 5, physical streams gauge 6, pump motor 7, high-pressure hydraulic pump 8; High pressure resistant explosion-proof heating device 2 comprises heating module 14, explosion-resistant enclosure 15, ceramic asbestos charges 16, control circuit board 17, pulse signal flow meter 18, snap joint 19, silica gel sealing ring 20, screw 21, pottery asbestos charges 16 can prevent explosion-resistant enclosure 15 in heating process from heating up, and can ensure that the temperature of heating water is not scattered and disappeared simultaneously.Water under high pressure is by snap joint 19, heated mould 14 pieces is entered through pulse signal flow meter 18, the temperature of water under high pressure is controlled by control circuit board 17, and prevent heating module 14 dry combustion method, can realize automatically stopping heating, control circuit board 17 controls the gear of heating module by control cables 23, realizes different heating power, reaches outlet temperature constant; Gas pumping device 3 comprises extraction supervisor 9, extraction flexible pipe 10, extraction arm 11, is flow in drainage device by mash gas pumping drilling 13 gas that pumping water into coal heating release produces.
A, at least 3 borings or utilize existing 3 mash gas pumping drillings of constructing on rock stratum, through coal seam, connect extraction flexible pipe, high-pressure water pipe and extraction arm, and the good mash gas pumping drilling of shutoff, prepare gas pumping.
The water of b, water storage box is connected with high-pressure hydraulic pump by pressure duct, pressurize through high-pressure hydraulic pump, pressure-relief valve can the pressure of manual adjustments water, the water of release can be back to again in water storage box, water under high pressure enters into high pressure resistant explosion-proof heating device by pressure duct, is heated by heating module, and control circuit board can regulate heating water temperature, when entering heating module if anhydrous, can realize automatically stopping heating.
C, being connected with extraction arm by high-pressure water pipe through the water of heating module enters in boring, heating water makes coal temperature raise by heat trnasfer, accelerate desorb and the migration of gas in coal body, the gas being in adsorbed state is made to be rapidly converted into free gas, because the borehole temperature of hot-water flooding raises, cause gas pressure around relatively high, flow in neighbouring extraction borehole from high to low by pressure official post gas pressure, in addition the adsorption capacity of coal body to water is greater than the adsorption capacity to gas, so in the process injecting water, water can enter in the adsorption space of gas, thus replace the position at gas station, reach the object of displacement gas, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity, accelerate extinction.
D, whole device after a drilling construction or stop hot-water flooding time, remove high-low pressure water filling device and high pressure resistant explosion-proof heating device, boring extraction flexible pipe and extraction supervisor and extraction arm heated in water filling and couples together.When heating other extraction borehole, repeat above step, whole process operation is simple, improves gas pumping successful.
Embodiment of the present invention is only the description carried out the preferred embodiment of the present invention; not design of the present invention and scope are limited; under the prerequisite not departing from design philosophy of the present invention; the various modification that in this area, engineers and technicians make technical scheme of the present invention and improvement; protection scope of the present invention all should be fallen into; the technology contents of request protection of the present invention, all records in detail in the claims.
Claims (6)
1. a device for damp and hot displacement in flooding and draining coal seam gas, is characterized in that: it comprises high-low pressure water filling device (1), high pressure resistant explosion-proof heating device (2), gas pumping device (3),
The high-pressure hydraulic pump (8) that described high-low pressure water filling device (1) comprises water storage box (4), be connected with water storage box (4) by high-pressure water pipe (5), the pump motor (7) driving high-pressure hydraulic pump (8), high-pressure hydraulic pump (8) is provided with pressure-relief valve (22),
Described high pressure resistant explosion-proof heating device (2) comprises and is arranged on mutual separated ceramic asbestos charges (16) and control circuit board (17) in explosion-resistant enclosure (15), heating module (14) is arranged in described ceramic asbestos charges (16), described heating module (14) is connected with high-pressure hydraulic pump (8) water side by snap joint (19), the water inlet of heating module (14) is provided with pulse signal flow meter (18), heating module (14) is provided with thermometer, this pulse signal flow meter (18) is connected with control circuit board (17) with thermometer, control circuit board (17) is connected with power supply by main power line (26), and the gear of heating module (14) is controlled by control cables (23),
The extraction arm (11) that gas pumping device (3) comprises extraction supervisor (9), is connected at least two extraction flexible pipes (10) in this extraction supervisor (9) and stretches in mash gas pumping drilling (13), the water side of described heating module (14) is connected with this extraction arm (11) respectively with the extraction flexible pipe (10) of described gas pumping device (3).
2. the device of damp and hot displacement in flooding according to claim 1 and draining coal seam gas, is characterized in that: described high-pressure water pipe (5) is provided with physical streams gauge (6).
3. the device of damp and hot displacement in flooding according to claim 1 and draining coal seam gas, is characterized in that: described heating module (14) comprising the casting module metal-back (29) be arranged in ceramic asbestos charges (16), being arranged at least one the S type water pipe (30) cast in module metal-back (29), for heating heater strip (27) and the magnesia (28) of casting module metal-back (29) and water pipe (30).
4. the device of damp and hot displacement in flooding according to claim 1 and draining coal seam gas, is characterized in that: the junction of the water inlet pipe of described explosion-resistant enclosure (15) and heating module (14), control cables (23), main power line (26) is respectively equipped with silica gel sealing ring (20) and screw (21) seals.
5. a method for damp and hot displacement in flooding and draining coal seam gas, is characterized in that: the device adopting damp and hot displacement in flooding as described in the claims 1,2,3,4 and draining coal seam gas, comprises the steps:
A, in rock stratum (24) upper construction at least 3 boring or utilize existing 3 mash gas pumping drillings (13), through coal seam (25), the extraction arm (11) of wherein 1 mash gas pumping drilling (13) is connected with the water side of heating module (14) and is used as water filling and adds thermic boring, the extraction arm (11) of other 2 mash gas pumping drillings (13) is connected with extraction flexible pipe (10), and the good each mash gas pumping drilling (13) of shutoff, prepare gas pumping;
The water of b, water storage box (4) is connected with high-pressure hydraulic pump (8) by pressure duct, pressurize through high-pressure hydraulic pump (8), pressure-relief valve (22) can manual adjustments water injection pressure, water under high pressure enters into high pressure resistant explosion-proof heating device (2) by pressure duct, heated by heating module (14), if control circuit board (17) can regulate heating water temperature, when entering heating module (17) anhydrous, can realize automatically stopping heating;
C, through the high temperature water of heating module (14), superheated water to be connected with extraction arm (11) by high-pressure water pipe and to enter water filling and add in thermic boring, high temperature water, superheated water makes coal temperature raise by heat trnasfer, accelerate desorb and the migration of gas (12) in coal body, the gas being in adsorbed state is made to be rapidly converted into free gas, because temperature in water injecting drilling raises, pressure is relatively high, migrated to area of low pressure by pressure official post gas (12) high-pressure area, in addition the adsorption capacity of coal body to water is greater than the adsorption capacity to gas, so in the process injecting water, water can enter in the adsorption space of gas, thus replace the position of gas, reach the object of displacement gas, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity, accelerate to reduce coal-bed gas outburst hazard.
6. the method for damp and hot displacement in flooding according to claim 5 and draining coal seam gas, it is characterized in that: after once constructing or when stopping injecting high temperature water, superheated water, remove high-low pressure water filling device (1) and high pressure resistant explosion-proof heating device (2), boring extraction flexible pipe (10) is heated in water filling extraction supervisor (9) and extraction arm (11) are coupled together, when other extraction borehole is heated, repeat above step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410839124.9A CN104500010B (en) | 2014-12-30 | 2014-12-30 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410839124.9A CN104500010B (en) | 2014-12-30 | 2014-12-30 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
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| CN104500010A true CN104500010A (en) | 2015-04-08 |
| CN104500010B CN104500010B (en) | 2017-02-22 |
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Cited By (11)
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| CN104863555A (en) * | 2015-05-18 | 2015-08-26 | 太原理工大学 | Method for improving downhole heating coal seam gas extraction amount |
| CN105239983A (en) * | 2015-10-15 | 2016-01-13 | 山东科技大学 | Low-gas permeability coal seam weakening and permeability increasing method combining presplitting and high-pressure water injection |
| CN106014363A (en) * | 2016-05-18 | 2016-10-12 | 中国矿业大学 | Method for improving underground coal mine gas extraction efficiency |
| CN107137839A (en) * | 2017-07-10 | 2017-09-08 | 西安森兰科贸有限责任公司 | It is mining from pressurised liquid carbon dioxide fire prevention and extinguishment system |
| CN107575263A (en) * | 2017-09-30 | 2018-01-12 | 太原理工大学 | A kind of device of underground heat injection enhanced gas extraction gas |
| CN107701157A (en) * | 2017-09-30 | 2018-02-16 | 太原理工大学 | A kind of device and method of underground heat injection transformation coal seam physical characteristic |
| CN107975359A (en) * | 2017-11-23 | 2018-05-01 | 山东科技大学 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
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| CN109296319A (en) * | 2018-11-16 | 2019-02-01 | 河南理工大学 | A kind of gas drainage hole is drilled with device |
| CN110242346A (en) * | 2019-06-26 | 2019-09-17 | 肥城白庄煤矿有限公司 | For coal seam tomography apparatus, the gas drainage under suction device and method of gas drainage under suction can be parsed |
| CN114320257A (en) * | 2021-12-30 | 2022-04-12 | 中国矿业大学 | Closed-loop system and method for enhanced extraction of heat injection coal seam after underground gas combustion of coal mine |
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