CN116971820A - Coal seam gas monitoring and releasing method - Google Patents
Coal seam gas monitoring and releasing method Download PDFInfo
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- CN116971820A CN116971820A CN202310944586.6A CN202310944586A CN116971820A CN 116971820 A CN116971820 A CN 116971820A CN 202310944586 A CN202310944586 A CN 202310944586A CN 116971820 A CN116971820 A CN 116971820A
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- 239000003245 coal Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 124
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000011435 rock Substances 0.000 claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims abstract description 11
- 238000005065 mining Methods 0.000 claims abstract description 10
- 239000003570 air Substances 0.000 claims description 111
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910001570 bauxite Inorganic materials 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 239000012080 ambient air Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 118
- 239000000463 material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A coal seam gas monitoring and releasing method comprises the following steps: step one: setting a gas concentration sensor for each area in a roadway in the coal seam mining process; step two: two channels are respectively arranged at the highest gas concentration position of each area obtained in the first step, the channel close to the roadway is an air inlet channel, and the channel far away from the roadway is an air outlet channel; step three: a ventilation pipeline is arranged beside a gas concentration sensor in the roadway, and a plurality of methane absorption boxes are arranged in the roadway; step four: in the coal seam exploitation process, when the gas concentration exceeds the specified concentration, a gas exchange pipeline is opened, and meanwhile, the methane absorption box can absorb methane in the tunnel air; step five: the gas inlet channel and the gas outlet channel are opened regularly, and then methane gas existing in the coal bed and the rock stratum is recycled regularly. According to the invention, the gas released in the rock stratum gap is conveniently carried out by additionally arranging the gas inlet channel and the gas outlet channel, so that the safe production of coal seam exploitation is ensured.
Description
Technical Field
The invention belongs to the field of coal seam mining gas treatment, and particularly relates to a coal seam gas monitoring and releasing method.
Background
Coal is one of the main energy materials in society, although the discovery and exploitation of resources such as petroleum, natural gas and the like reduce the energy value of coal, but the coal is still a common fuel material in the industry and daily life at present, especially, the main fuel material for heating in winter in a thermal power plant is still coal, so the current coal demand is huge, and the trend of increasing year by year is presented, the gas among coal layers is released in the current coal seam exploitation, the main materials in the gas are methane, carbon dioxide, nitrogen and the like, explosion is easily caused when the gas concentration exceeds 5%, the methane in the gas is discharged into the air at the same time, environmental pollution is caused, the methane is used as a gas fuel with good effect, the direct discharge wastes the resources and pollutes the environment, and the concentration control of the gas at present is to ensure that the gas content in the air in a roadway is less than 5% by timely ventilation, but the phenomenon of gas is not released in a large amount in a short time at the moment if the gas is outstanding, the phenomenon can not be timely discharged at the moment, thus the coal is easy to cause underground accidents to happen, and the production safety is influenced.
Disclosure of Invention
The invention provides a coal seam gas monitoring and releasing method which is used for solving the defects in the prior art.
The invention is realized by the following technical scheme:
a coal seam gas monitoring and releasing method comprises the following steps:
step one: measuring the gas concentration of each area in the roadway in the coal seam mining process to determine a gas concentration sensor at a gas injection head corresponding to the area with the highest gas concentration;
step two: two channels are respectively arranged at the highest gas concentration position of each area obtained in the first step, the channel close to the roadway is an air inlet channel, the air inlet channel is connected with an air inlet fan, the air inlet fan blows in external air, then the channel far away from the roadway is an air outlet channel, the air outlet channel is connected with a negative pressure fan, and the negative pressure fan directly discharges the air after the air is pumped out and passes through a methane absorber;
step three: a ventilation pipeline is arranged beside a gas concentration sensor in the roadway, the ventilation pipeline is positioned at one end outside the roadway and is connected with a negative pressure fan, the negative pressure fan directly discharges gas into the air after the gas is pumped out and passes through a methane absorber, and a plurality of methane absorption boxes are arranged in the roadway;
step four: the gas concentration sensor acquires the gas concentration in the tunnel in real time and transmits data to the remote terminal through the optical fiber in the coal seam mining process, and when the gas concentration exceeds the specified concentration, the negative pressure fan communicated with the ventilation pipeline is started to accelerate the exchange of air in the tunnel and external ambient air, and meanwhile, the methane absorption box can absorb methane in the tunnel air;
step five: and then the methane gas existing in the coal bed and the rock stratum is recycled periodically, so that potential safety hazards caused by the escape of the methane gas into a roadway are avoided, and the production safety of the roadway is ensured.
According to the coal seam gas monitoring and releasing method, the gas concentration sensor in the step is a high-low concentration methane gas sensor for GJC4 coal mines, and the setting interval of the gas concentration sensor is 10-20m.
According to the coal seam gas monitoring and releasing method, the fracturing propping agent is put into the air inlet channel and the air outlet channel in the second step, so that collapse of the air inlet channel and the air outlet channel can be avoided.
According to the coal seam gas monitoring and releasing method, the fracturing propping agent comprises the following components in parts by weight: 40-60 parts of bauxite, 10-20 parts of quartz sand and 20-30 parts of clay.
The method for monitoring and releasing the coal bed gas comprises the following steps of:
step one: accurately weighing bauxite, quartz sand and clay, and then adding water with the volume-mass ratio of 0.3-0.5 for mixing and making a blank to obtain a crude blank;
step two: feeding the rough blank into a rotary furnace, and calcining at 1000-1500 ℃ for 40-60min;
step three: taking out and cooling after calcining, and crushing into irregular particles with the particle size of 3-6mm by a crusher.
According to the coal seam gas monitoring and releasing method, the pressure sensor and the temperature sensor are arranged at the bottoms of the air inlet channel and the air outlet channel in the second step.
According to the coal seam gas monitoring and releasing method, the active carbon particles capable of adsorbing methane are placed in the methane absorber and the methane absorption box in the second step and the third step, and the active carbon particles can release and reuse the methane after being heated.
According to the coal seam gas monitoring and releasing method, the gas designated concentration in the tunnel air in the fourth step is 3%.
According to the coal seam gas monitoring and releasing method, the remote terminal in the fourth step is the control host arranged on the well, the control host can record gas concentration data in real time and send out a warning to related staff on the well through wireless signals when the gas concentration is abnormal, and meanwhile, the warning device in the underground roadway is controlled to send out warning sounds to remind the underground staff to evacuate in time.
In the above method for monitoring and releasing coal seam gas, in the fifth step, gas concentration sensors may be disposed at bottoms of the gas inlet channel and the gas outlet channel, and the methane discharging and recovering operation in the bottom gap may be determined by detecting the gas concentrations at bottoms of the gas inlet channel and the gas outlet channel.
The invention has the advantages that:
1. according to the invention, the air inlet channel and the air outlet channel are additionally arranged, the air inlet channel is close to the roadway, the air is blown into the air inlet channel to block the gas in the rock stratum gap from entering the roadway, and meanwhile, the gas flowing to the air inlet channel is blocked and then flows to the air outlet pipeline, so that the gas released in the rock stratum gap is conveniently carried out, the overflow of the gas from the roadway is reduced, the gas protrusion phenomenon generated after the gas is gathered can be effectively avoided, and the safe production of coal seam mining is ensured.
2. According to the invention, the pressure sensor and the temperature sensor can be arranged at the bottoms of the air inlet channel and the air outlet channel, the pressure sensor and the temperature sensor transmit pressure information and temperature information to an uphole terminal in real time, and related information is transmitted to related personnel in time and a warning is given out when the pressure and the temperature change are changed greatly by monitoring the pressure change and the temperature change, so that the related personnel are reminded of knowing to process in time, meanwhile, an air inlet fan connected with the air inlet channel and a negative pressure fan connected with the air outlet channel can be directly adopted to start to extract gas and supplement air into a rock stratum when the pressure and the temperature are high, and the condition that gas is raised or even exploded after gas is gathered is avoided.
3. According to the invention, the gas concentration sensors can be arranged at the bottoms of the gas inlet channel and the gas outlet channel, so that gas discharge operation is immediately performed when the gas concentration at the bottom of the gas inlet channel reaches 10% or when the gas concentration at the bottom of the gas outlet channel reaches 5%, and the safe production is ensured.
4. According to the invention, after the air inlet channel and the air outlet channel are arranged, the fracturing propping agent is added, so that gaps in the air inlet channel and the air outlet channel can be fractured, the air inlet channel and the air outlet channel are supported, the gas flow of the air inlet channel and the air outlet channel is not influenced, and the normal use of the air inlet channel and the air outlet channel is ensured.
5. According to the invention, the activated carbon particles capable of adsorbing methane are placed in the methane absorber and the methane absorption box to adsorb methane, meanwhile, the activated carbon particles release methane gas at high temperature, and meanwhile, the activated carbon particles which release methane gas can be reused, so that safe production is ensured, meanwhile, the methane gas can be conveniently recycled, and meanwhile, the activated carbon particles can be recycled, so that full utilization of resources is realized.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A coal seam gas monitoring and releasing method comprises the following steps:
step one: measuring the gas concentration of each area in the roadway in the coal seam mining process to determine a gas concentration sensor at a gas injection head corresponding to the area with the highest gas concentration;
step two: two channels are respectively arranged at the highest gas concentration position of each area obtained in the first step, the channel close to the roadway is an air inlet channel, the air inlet channel is connected with an air inlet fan, the air inlet fan blows in external air, then the channel far away from the roadway is an air outlet channel, the air outlet channel is connected with a negative pressure fan, the negative pressure fan directly discharges the air into the air after the air is pumped out by the negative pressure fan and passes through a methane absorber, the distance between the air inlet channel and the air outlet channel is 6-8m, the depth of the air inlet channel is 8-10m, the depth of the air outlet channel is 6-8m, and the bottoms of the air inlet channel and the air outlet channel can be communicated in a lateral oblique drilling mode; according to the invention, the air inlet channel and the air outlet channel are additionally arranged, the air inlet channel is close to the roadway, the air is blown into the air inlet channel to block the gas in the rock stratum gap from entering the roadway, and meanwhile, the gas flowing to the air inlet channel is blocked and then flows to the air outlet pipeline, so that the gas released in the rock stratum gap is conveniently carried out, the overflow of the gas from the roadway is reduced, the gas protrusion phenomenon generated after the gas is gathered can be effectively avoided, and the safe production of coal seam mining is ensured.
Step three: a ventilation pipeline is arranged beside a gas concentration sensor in the roadway, the ventilation pipeline is positioned at one end outside the roadway and is connected with a negative pressure fan, the negative pressure fan directly discharges gas into the air after the gas is pumped out and passes through a methane absorber, a plurality of methane absorption boxes are arranged in the roadway, and one methane absorption box is arranged in the middle part and two sides of the bottom of the roadway at intervals of 5-10 m;
step four: the gas concentration sensor acquires the gas concentration in the tunnel in real time and transmits data to the remote terminal through the optical fiber in the coal seam mining process, and when the gas concentration exceeds the specified concentration, the negative pressure fan communicated with the ventilation pipeline is started to accelerate the exchange of air in the tunnel and external ambient air, and meanwhile, the methane absorption box can absorb methane in the tunnel air;
step five: and then the methane gas existing in the coal bed and the rock stratum is recycled periodically, so that potential safety hazards caused by the escape of the methane gas into a roadway are avoided, and the production safety of the roadway is ensured.
Preferably, the gas concentration sensor in the step is a high-low concentration methane gas sensor for GJC4 coal mines, and the setting interval of the gas concentration sensor is 10-20m.
Preferably, the inlet channel and the outlet channel in the second step are fed with the fracturing propping agent, so that collapse of the inlet channel and the outlet channel can be avoided. According to the invention, after the air inlet channel and the air outlet channel are arranged, the fracturing propping agent is added, so that the gaps in the air inlet channel and the air outlet channel can be fractured, the air flow of the air inlet channel and the air outlet channel is not influenced while the air inlet channel and the air outlet channel are supported, and meanwhile, after the fracturing propping agent is pressed out of the gaps, the air inlet channel and the air outlet channel can better exchange gas with the rock stratum gap, thereby ensuring the normal use of the air inlet channel and the air outlet channel and improving the discharge efficiency of the gas in the rock stratum gap.
Preferably, the fracturing propping agent comprises the following components in parts by weight: 40-60 parts of bauxite, 10-20 parts of quartz sand and 20-30 parts of clay.
Preferably, the preparation method of the fracturing propping agent comprises the following steps:
step one: accurately weighing bauxite, quartz sand and clay, and then adding water with the volume-mass ratio of 0.3-0.5 for mixing and making a blank to obtain a crude blank;
step two: feeding the rough blank into a rotary furnace, and calcining at 1000-1500 ℃ for 40-60min;
step three: taking out and cooling after calcining, and crushing into irregular particles with the particle size of 3-6mm by a crusher.
The fracturing propping agent has the advantages that bauxite, quartz sand and clay are selected as raw materials, the cost of the raw materials is low, the preparation method is simple, the production is convenient, and the production cost is effectively saved.
Preferably, the air inlet channel and the air outlet channel in the second step are provided with a pressure sensor and a temperature sensor at the bottom. According to the invention, the pressure sensor and the temperature sensor can be arranged at the bottoms of the air inlet channel and the air outlet channel, the pressure sensor and the temperature sensor transmit pressure information and temperature information to an uphole terminal in real time, and related information is transmitted to related personnel in time and a warning is given out when the pressure and the temperature change are changed greatly by monitoring the pressure change and the temperature change, so that the related personnel are reminded of knowing to process in time, meanwhile, an air inlet fan connected with the air inlet channel and a negative pressure fan connected with the air outlet channel can be directly adopted to start to extract gas and supplement air into a rock stratum when the pressure and the temperature are high, and the condition that gas is raised or even exploded after gas is gathered is avoided.
Preferably, the methane absorber and the methane absorption box in the second step and the third step are internally provided with activated carbon particles capable of absorbing methane, and the activated carbon particles can release and reuse the methane after being heated. According to the invention, the activated carbon particles capable of adsorbing methane are placed in the methane absorber and the methane absorption box to adsorb methane, meanwhile, the activated carbon particles release methane gas at high temperature, and meanwhile, the activated carbon particles which release methane gas can be reused, so that safe production is ensured, meanwhile, the methane gas can be conveniently recycled, and meanwhile, the activated carbon particles can be recycled, so that full utilization of resources is realized.
Preferably, in the fourth step, the specified concentration of the gas in the tunnel air is 3%. The gas concentration in the roadway reaches 3%, the exhaust pipeline is required to be started, signals are sent to the underground remote terminal, and warning is given to underground personnel, so that the underground personnel can make judgment in time, and the underground personnel can evacuate in time, and the personal safety of the underground personnel is ensured.
Preferably, the remote terminal in the fourth step is a control host arranged on the well, and the control host can record the gas concentration data in real time and send out a warning to the relevant staff on the well through a wireless signal when the gas concentration is abnormal, and meanwhile, an alarm in the underground roadway is controlled to send out a warning sound to remind the underground staff to evacuate in time.
Preferably, in the fifth step, gas concentration sensors may be disposed at bottoms of the gas inlet channel and the gas outlet channel, and the methane discharging and recovering operation in the bottom gap may be determined by detecting the gas concentrations at bottoms of the gas inlet channel and the gas outlet channel. According to the invention, the gas concentration sensors can be arranged at the bottoms of the gas inlet channel and the gas outlet channel, so that gas discharge operation is immediately performed when the gas concentration at the bottom of the gas inlet channel reaches 10% or when the gas concentration at the bottom of the gas outlet channel reaches 5%, and the safe production is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A coal seam gas monitoring and releasing method is characterized in that: the method comprises the following steps:
step one: measuring the gas concentration of each area in the roadway in the coal seam mining process to determine a gas concentration sensor at a gas injection head corresponding to the area with the highest gas concentration;
step two: two channels are respectively arranged at the highest gas concentration position of each area obtained in the first step, the channel close to the roadway is an air inlet channel, the air inlet channel is connected with an air inlet fan, the air inlet fan blows in external air, then the channel far away from the roadway is an air outlet channel, the air outlet channel is connected with a negative pressure fan, and the negative pressure fan directly discharges the air after the air is pumped out and passes through a methane absorber;
step three: a ventilation pipeline is arranged beside a gas concentration sensor in the roadway, the ventilation pipeline is positioned at one end outside the roadway and is connected with a negative pressure fan, the negative pressure fan directly discharges gas into the air after the gas is pumped out and passes through a methane absorber, and a plurality of methane absorption boxes are arranged in the roadway;
step four: the gas concentration sensor acquires the gas concentration in the tunnel in real time and transmits data to the remote terminal through the optical fiber in the coal seam mining process, and when the gas concentration exceeds the specified concentration, the negative pressure fan communicated with the ventilation pipeline is started to accelerate the exchange of air in the tunnel and external ambient air, and meanwhile, the methane absorption box can absorb methane in the tunnel air;
step five: and then the methane gas existing in the coal bed and the rock stratum is recycled periodically, so that potential safety hazards caused by the escape of the methane gas into a roadway are avoided, and the production safety of the roadway is ensured.
2. The method for monitoring and releasing coal seam gas according to claim 1, wherein: the gas concentration sensor in the first step is a high-low concentration methane gas sensor for GJC4 coal mines, and the setting interval of the gas concentration sensor is 10-20m.
3. The method for monitoring and releasing coal seam gas according to claim 1, wherein: and in the second step, the air inlet channel and the air outlet channel are fed with fracturing propping agent, so that collapse of the air inlet channel and the air outlet channel can be avoided.
4. A method for monitoring and releasing coal seam gas according to claim 3, wherein: the fracturing propping agent comprises the following components in parts by weight: 40-60 parts of bauxite, 10-20 parts of quartz sand and 20-30 parts of clay.
5. The method for monitoring and releasing coal seam gas according to claim 4, wherein: the preparation method of the fracturing propping agent comprises the following steps:
step one: accurately weighing bauxite, quartz sand and clay, and then adding water with the volume-mass ratio of 0.3-0.5 for mixing and making a blank to obtain a crude blank;
step two: feeding the rough blank into a rotary furnace, and calcining at 1000-1500 ℃ for 40-60min;
step three: taking out and cooling after calcining, and crushing into irregular particles with the particle size of 3-6mm by a crusher.
6. The method for monitoring and releasing coal seam gas according to claim 1, wherein: and in the second step, the air inlet channel and the air outlet channel are provided with a pressure sensor and a temperature sensor at the bottom.
7. The method for monitoring and releasing coal seam gas according to claim 1, wherein: and the methane absorber and the methane absorption box in the second step and the third step are internally provided with activated carbon particles capable of absorbing methane, and the activated carbon particles can release and reuse the methane after being heated.
8. The method for monitoring and releasing coal seam gas according to claim 1, wherein: in the fourth step, the gas concentration in the tunnel air is 3%.
9. The method for monitoring and releasing coal seam gas according to claim 1, wherein: the remote terminal in the fourth step is a control host arranged on the well, the control host can record the gas concentration data in real time and send out a warning to the related staff on the well through a wireless signal when the gas concentration is abnormal, and meanwhile, an alarm in the underground roadway is controlled to send out an alarm sound to remind the underground staff to evacuate in time.
10. The method for monitoring and releasing coal seam gas according to claim 1, wherein: in the fifth step, gas concentration sensors can be arranged at the bottoms of the gas inlet channel and the gas outlet channel, and the methane discharge and recovery operation in the bottom gap can be judged by detecting the gas concentrations at the bottoms of the gas inlet channel and the gas outlet channel.
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