CN105041374A - Method for preventing and controlling gas and coal fire together in high-gas close-distance coal seam goaf - Google Patents
Method for preventing and controlling gas and coal fire together in high-gas close-distance coal seam goaf Download PDFInfo
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Abstract
The invention discloses a method for preventing and controlling gas and coal fire together in a high-gas close-distance coal seam goaf. The method comprises the following steps of determining a key area for preventing and controlling gas and coal fire in the goaf; setting gas detecting points at the head, middle, tail, upper and return portions of a work face, an air intake way, a air-return way and the middle segment of the air-return way; determining the air input; raising a high drawing way in a 301 work face until a three-mining-zone air return uphill is opened; establishing a grouting pump station near to an air return well of a mine, and making a pipe enter into the goaf after passing a total air-return way, a three-mining-zone air return uphill, a 301 work face air return crossheading to form a grouting fire extinguishing system; and establishing a series of control emergency technical measures. By adopting the Method for preventing and controlling gas and coal fire together in high-gas close-distance coal seam goaf, a 301 fully mechanized coal mining face can safely and efficiently produce.
Description
Technical field
The present invention relates to coal mine gas and coal fire prevention and control field, be specifically related to high methane Goaf of Close Distance Coal Seams gas and coal fire works in coordination with Prevention Technique.
Background technology
Coal is the main body energy of China, disaster the most outstanding in coal production is exactly that gas and coal spontaneous are got angry, when face gas and coal spontaneous combustion coexist, greatly threaten mine safety production, especially the gas of high methane Goaf of Close Distance Coal Seams and the problem of coal fire disaster, after seam mining, upper adjacent coal seam is caving in goaf, exacerbate gas and coal fire prevents and treats problem, simultaneously the prophylactico-therapeutic measures implementation process of mine gas and coal spontaneous combustion can exist leak out in contradiction, because gas exhaust can cause goaf air leaking, just easily cause coal spontaneous combustion, and the ignition source that coal body spontaneous combustion becomes again gas combustion and gas explosion may cause gas explosion, become the major hazard source of shaft production, conversely, in control spontaneous combustion process, the goaf of taking and coal body shutoff, minimizing is leaked out, and loose coal perfusion fire extinguishing yellow mud colloid forms the measures such as isolation strip, is unfavorable for again the pump drainage of gas.Therefore, when high methane short range seam mining, should gas exhaust be considered, take into account Air leakage control control freely burning fire again, become a difficult problem for high methane Goaf of Close Distance Coal Seams gas and coal spontaneous combustion disaster mine realization safety in production.
Along with the increasing of mining depth and output, goaf gas and spontaneous combustion two large problems will be tending towards outstanding.Mining rate increases, and bring this coal seam to lose increasing of coal amount and closely adjacent coal seam degree of fragmentation increase on the one hand, autoignition conditions advantageously; Meanwhile, the gas that this coal seam and adjacent coal seam are gushed out also increases, and the absolute outburst amount of face gas also significantly increases, and objectively naturally increases the ventilation of work plane, causes spontaneous combustion in goaf more frequently to be given prominence to.
Under specific exploitation natural conditions, spontaneous combustion in goaf depends mainly on goaf oxygen concentration distribution, and goaf gas is gushed out and affected goaf oxygen concentration distribution; And the distribution of flow field oxygen concentration and Gas Distribution and Emission Law determined by fluidised form.Above-mentioned objective phenomenon shows, namely exists while improving gas safety and spontaneous fire safety also will be made to reduce; Otherwise, the requirement of safety dumping gas can not be met again while reducing spontaneous fire danger, easily cause the unbalance of attending to one thing and lose sight of another of two kinds of potential safety hazards.Goaf gas and coal fire compound cause calamity relation as shown in Figure 1
As shown in Figure 1, high methane Goaf of Close Distance Coal Seams gas and coal fire disaster closed be:
(1) from the characteristic of two kinds of disasters, Gas Disaster need this three's acting in conjunction of gas, oxygen and ignition source, wherein gas and oxygen are objective reality in goaf, and ignition source is mainly derived from coal spontaneous combustion in inside, goaf.
(2) from the generating process of two kinds of disasters, gas reaches condition to explode rapidly, and the generation of coal spontaneous combustion development need experience a period of time, and control gas disaster is more severe.Although the focus of preventing and treating of goaf gas and coal spontaneous combustion compound disaster is to control goaf coal spontaneous combustion, stop gas explosion ignition source, but prevention emphasis is gas, if because the coal spontaneous combustion of priority control goaf, though goaf gas can be avoided to explode but to a certain degree have impact on gas control, gas may be caused to pour in work plane, increase face gas explosion hazard.
Summary of the invention
For solving the problem, the invention provides a kind of high methane Goaf of Close Distance Coal Seams gas and coal fire works in coordination with Prevention Technique, achieving the safe and efficient production of 301 fully-mechanized mining working.
For achieving the above object, the technical scheme that the present invention takes is:
High methane Goaf of Close Distance Coal Seams gas and coal fire work in coordination with Prevention Technique, comprise the steps:
S1, help, air return way helps each pre-buried 2 inches of steel pipe 200m under 301 work plane air intake crossheadings, respectively in steel pipe arrange that single core beam tube 3, temperature pick up and transmission cable 3 overlap, interval 50m between monitoring point, buries 6, monitoring point altogether underground; Pre-buried beam tube overcoat 2 inches of steel pipes, probe overcoat 3 cun of steel pipes are protected.The gas sample of a measuring point is responsible for by every root beam tube, and in order to prevent water in gob area from blocking beam tube, then each probe raises more than 1m, and temperature pick up is imbedded in steel pipe concordant with beam tube air inlet port, goes between to pull out in the steel pipe of 2 inches; The gas concentration of METHOD FOR CONTINUOUS DETERMINATION goaf different monitoring points; Adopt Surfer8.0 software that the degree of depth that oxygen concentration gos deep into goaf with measuring point is plotted curve, meanwhile, the degree of depth that gas density gos deep into goaf with measuring point is plotted curve, determine the key area of goaf gas and coal fire diaster prevention and control;
S2, work plane head, in, tail, on, return, air intake lane, return airway, sets gas management point in return airway stage casing, return airway apart from work plane return air inlet 5m place installation CH
4sensor one; At face upper corner angle and place of coal side corresponding to break line, CH is installed
4sensor one; Coal-winning machine must install machine-carried type CH
4cutoff instrument or portable CH
4detection alarm instrument; When gas density is more than 0.8%, work plane must stop operation, All Jobs personnel withdraw to fresh distinguished and admirable in, and to ore deposit scheduling report; Ascertain the reason after being disposed, can resume production when gas density is less than 0.8%; Respectively install a CO sensor at face upper corner angle, return air entrance to a lane, warning concentration is 24ppm; After occurring that CO reports to the police, should stop operation immediately, operating personnel evacuates to safety place rapidly, and after ascertaining the reason and being disposed, CO concentration is less than 24ppm, can resume production;
S3, during 301 working face extractions, wind supply quantity is 3500m
3about/min, plenum area per ten days carries out primary air flow mensuration to work plane, and measuring point is air intake lane, return airway, Nei Cuowei lane;
S4, to play slope to three in 301 work plane supratidal pond lanes and adopt return air and to go up a hill enabling, find and tunnel along 13# roof K3 limestone, with return airway parallel construction rock gangway, simultaneously apart from cutting a 360m place, from the climbing of tail lane to 13# roof, tunnel to cutting anti-pick after near eye, supporting is not carried out in naked lane, clear span 2.5m, clear height 2.4, section 6m
2, with roof at a distance of 30m, with 25m wrong in return airway;
S5, near mine return air well, set up grouting pumping plant, pipeline is gone up a hill via main return airway, three exploiting field return air, 301 work plane air return way, enters goaf, forms grouting fire extinguishing system;
S6, set up down-hole and to drill fast setting of casing system: rig of putting out a fire (modified electric rock drill), electric coal drill, the 50mm drilling rod that can be used as sleeve pipe, the drill bit matched and sebific duct etc. are placed near gate top entrance;
S7, set up mining mobile grouting device system, place a slurry filling machine at gate top and lower gangway entrance respectively, should keep normal, immediately can transport place to use to according to actual needs.
S8, set up liquid carbon dioxide fire extinguishing system, adopt that mining mobile liquid carbon dioxide fire extinguishing device is lowered the temperature to heterogeneous goaf hidden danger point, inerting and datonation-inhibition.
S9, set up inhibition foam and vapour colloidal sol resistance chemoprevention fire extinguishing system, can retardant be brought into deep goaf.
Preferably, described grouting fire extinguishing system is made up of slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission and pipe network, and described slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission, pipe network are connected successively.
Preferably, described filter processed comprises quantitative feed and automatic filter pulp two parts processed, and soil is pressed 20m by described quantitative feed part
3the amount of/h evenly sends into filter pulp part processed automatically, and according to the required concentration of slurry proportioning water yield, and qualified slurries are made in stirring, automatically leach in slurries the solid particle being greater than 8mm.
Preferably, described mining mobile grouting device adopts ZHJ-5/1.8N Mobile anti-extinguishment grouting device, is positioned near down-hole grouting point, for adding composite colloid gelling agent.
The present invention has following beneficial effect:
After testing, after using suction road, return airway gas density drops to 0.11 ~ 0.67% by 0.29 ~ 0.78% before, face gas concentration drops to 0.24 ~ 0.67% by 0.16 ~ 0.72% before, and the gas density of upper corner drops to 0.11 ~ 0.64% by 0.32 ~ 0.79% before.Although stoping period absolute gas emission rate is large, but because applying suitable extraction technology, taking effective Gas Control measure, ensure that suction road realizes effective mash gas extraction, the maximum gas density of work plane, upper corner, return airway all controls within 1%, achieves the safe and efficient production of 301 fully-mechanized mining working.
Accompanying drawing explanation
Fig. 1 high methane Goaf of Close Distance Coal Seams gas and coal fire disaster relation schematic diagram.
Fig. 2 is that the embodiment of the present invention 301 fully mechanized coal face goaf " three bands " observation point arranges schematic diagram.
Fig. 3 is the embodiment of the present invention 301 fully mechanized coal face pipe laying observation Probe arrangement schematic diagram.
Fig. 4 is that the embodiment of the present invention is combined and adopted goaf gas and coal fire disaster and work in coordination with and prevent and treat key area.
Fig. 5 is that embodiment of the present invention goaf gas and coal fire disaster work in coordination with control method.
Fig. 6 is that in the embodiment of the present invention, suction road arranges schematic diagram.
Fig. 7 is the structural representation of fire extinguishing system of being in the milk in the embodiment of the present invention.
Fig. 8 is the embodiment of the present invention 301 work plane goaf grouting spirogram.
Fig. 9 is the embodiment of the present invention 301 work plane suction road CO concentration map.
Figure 10 is the embodiment of the present invention 301 work plane suction road CO scale figure.
Figure 11 is the embodiment of the present invention 301 work plane bound polyamine CO change in concentration figure.
Figure 12 is the variation diagram of the embodiment of the present invention 301 fully mechanized coal face return airway, work plane, gas at upper corner concentration.
Figure 13 is embodiment of the present invention work plane moon advancing distance and accumulative advancing distance figure.
Figure 14 is the monthly output of embodiment of the present invention work plane and cumulative production figure.
In figure: 1-Tu Chang; 2-filter; 3-water supply installation; 4-pulp pump machine; 5-down-hole grouting pipe network; 6-colliery slurry filling machine; 7-uses glue place; 8-temperature pick up; 9-lute in;
Detailed description of the invention
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in figures 2-6, embodiments provide a kind of high methane Goaf of Close Distance Coal Seams gas and coal fire works in coordination with Prevention Technique, comprise the steps:
S1, help, air return way helps each pre-buried 2 inches of steel pipe 200m under 301 work plane air intake crossheadings, respectively in steel pipe arrange that single core beam tube 3, temperature pick up and transmission cable 3 overlap, interval 50m between monitoring point, buries 6, monitoring point altogether underground; Pre-buried beam tube overcoat 2 inches of steel pipes, probe overcoat 3 cun of steel pipes are protected.The gas sample of a measuring point is responsible for by every root beam tube, and in order to prevent water in gob area from blocking beam tube, then each probe raises more than 1m, and temperature pick up is imbedded in steel pipe concordant with beam tube air inlet port, goes between to pull out in the steel pipe of 2 inches; The gas concentration of METHOD FOR CONTINUOUS DETERMINATION goaf different monitoring points; Adopt Surfer8.0 software that the degree of depth that oxygen concentration gos deep into goaf with measuring point is plotted curve, simultaneously, the degree of depth that gas density gos deep into goaf with measuring point is plotted curve, (according to Tianchi company Limit Parameters of Coal Spontaneous Combustion value, heat-radiation belt is >=18% to divide heterogeneous goaf " three bands " with oxygen concentration; Oxidation intensification band is 8 ~ 18%; Suffocative zone is < 8%); Goaf gas disaster region (gas Bu Bao district < 5, > 16% is divided with gas density; Gas can quick-fried district 5 ~ 16%).By the oxygen concentration of on-the-spot actual observation and the superposition of gas density distribution isogram, prevent and treat key area divide 301 fully mechanized coal face goaf gas and coal fire disaster are collaborative; Each area distribution basic condition is as shown in table 1, determines the key area of goaf gas and coal fire diaster prevention and control;
Table 1301 is combined and is adopted goaf gas and coal fire disaster and work in coordination with and prevent and treat key area distribution table
S2, work plane head, in, tail, on, return, air intake lane, return airway, sets gas management point in return airway stage casing, return airway apart from work plane return air inlet 5m place installation CH
4sensor one; At face upper corner angle and place of coal side corresponding to break line, CH is installed
4sensor one; Coal-winning machine must install machine-carried type CH
4cutoff instrument or portable CH
4detection alarm instrument; When gas density is more than 0.8%, work plane must stop operation, All Jobs personnel withdraw to fresh distinguished and admirable in, and to ore deposit scheduling report; Ascertain the reason after being disposed, can resume production when gas density is less than 0.8%; Respectively install a CO sensor at face upper corner angle, return air entrance to a lane, warning concentration is 24ppm; After occurring that CO reports to the police, should stop operation immediately, operating personnel evacuates to safety place rapidly, and after ascertaining the reason and being disposed, CO concentration is less than 24ppm, can resume production;
S3, during 301 working face extractions, wind supply quantity is 3500m
3about/min, plenum area per ten days carries out primary air flow mensuration to work plane, and measuring point is air intake lane, return airway, Nei Cuowei lane;
S4, to play slope to three in 301 work plane supratidal pond lanes and adopt return air and to go up a hill enabling, find and tunnel along 13# roof K3 limestone, with return airway parallel construction rock gangway, simultaneously apart from cutting a 360m place, from the climbing of tail lane to 13# roof, tunnel to cutting anti-pick after near eye, supporting is not carried out in naked lane, clear span 2.5m, clear height 2.4, section 6m
2, with roof at a distance of 30m, with 25m wrong in return airway;
S5, near mine return air well, set up grouting pumping plant, pipeline is gone up a hill via main return airway, three exploiting field return air, 301 work plane air return way, enters goaf, forms grouting fire extinguishing system;
S6, set up down-hole and to drill fast setting of casing system: rig of putting out a fire (modified electric rock drill), electric coal drill, the 50mm drilling rod that can be used as sleeve pipe, the drill bit matched and sebific duct etc. are placed near gate top entrance;
S7, set up mining mobile grouting device system, place a slurry filling machine at gate top and lower gangway entrance respectively, should keep normal, immediately can transport place to use to according to actual needs.
S8, set up liquid carbon dioxide fire extinguishing system, adopt that mining mobile liquid carbon dioxide fire extinguishing device is lowered the temperature to heterogeneous goaf hidden danger point, inerting and datonation-inhibition.
S9, set up inhibition foam and vapour colloidal sol resistance chemoprevention fire extinguishing system, can retardant be brought into deep goaf.
As shown in Figure 7, described grouting fire extinguishing system is made up of slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission and pipe network, and described slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission, pipe network are connected successively.Described filter processed comprises quantitative feed and automatic filter pulp two parts processed, and soil is pressed 20m by described quantitative feed part
3the amount of/h evenly sends into filter pulp part processed automatically, and according to the required concentration of slurry proportioning water yield, and qualified slurries are made in stirring, automatically leach in slurries the solid particle being greater than 8mm.Described mining mobile grouting device adopts ZHJ-5/1.8N Mobile anti-extinguishment grouting device, is positioned near down-hole grouting point, for adding composite colloid gelling agent.
Work plane CO prevention effect
Fig. 8 is 301 work plane goaf monthly grouting amounts, Fig. 9-11 is that in May, 2013 is in March, 2014,301 work plane suction road CO concentration and scale, bound polyamine CO change in concentration, as seen from the figure in suction road CO concentration all lower than 38ppm, in bound polyamine, CO concentration controls at 10ppm, then 301 working face extraction period CO concentration all control in the reasonable scope, and spontaneous combustion does not occur goaf coal body.
Face gas prevention effect
Figure 12 is the change that 301 fully mechanized coal faces use return airway, work plane, gas at upper corner concentration before and after suction road, as known in the figure, after using suction road, return airway gas density drops to 0.11 ~ 0.67% by 0.29 ~ 0.78% before, face gas concentration drops to 0.24 ~ 0.67% by 0.16 ~ 0.72% before, and the gas density of upper corner drops to 0.11 ~ 0.64% by 0.32 ~ 0.79% before.Although stoping period absolute gas emission rate is large, but because applying suitable extraction technology, taking effective Gas Control measure, ensure that suction road realizes effective mash gas extraction, the maximum gas density of work plane, upper corner, return airway all controls within 1%, achieves the safe and efficient production of 301 fully-mechanized mining working.
Work plane producing coal is analyzed
Figure 13,14 be 301 work planes from May, 2013 in August, 2014, the moon advancing distance, monthly output and the relation of time, under the prerequisite of guarantee 301 work plane safety coal extraction, the highest 16.1 ten thousand t of 301 work plane monthly output, the largest moon, advancing distance was 112m, and common property raw coal more than 200 ten thousand t, advances more than 1500 m.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. high methane Goaf of Close Distance Coal Seams gas and coal fire work in coordination with Prevention Technique, it is characterized in that, comprise the steps:
S1, help, air return way helps each pre-buried 2 inches of steel pipe 200m under 301 work plane air intake crossheadings, respectively in steel pipe arrange that single core beam tube 3, temperature pick up and transmission cable 3 overlap, interval 50m between monitoring point, buries 6, monitoring point altogether underground; Pre-buried beam tube overcoat 2 inches of steel pipes, probe overcoat 3 cun of steel pipes are protected.The gas sample of a measuring point is responsible for by every root beam tube, and in order to prevent water in gob area from blocking beam tube, then each probe raises more than 1m, and temperature pick up is imbedded in steel pipe concordant with beam tube air inlet port, goes between to pull out in the steel pipe of 2 inches; The gas concentration of METHOD FOR CONTINUOUS DETERMINATION goaf different monitoring points; Adopt Surfer8.0 software that the degree of depth that oxygen concentration gos deep into goaf with measuring point is plotted curve, meanwhile, the degree of depth that gas density gos deep into goaf with measuring point is plotted curve, determine the key area of goaf gas and coal fire diaster prevention and control;
S2, work plane head, in, tail, on, return, air intake lane, return airway, sets gas management point in return airway stage casing, return airway apart from work plane return air inlet 5m place installation CH
4sensor one; At face upper corner angle and place of coal side corresponding to break line, CH is installed
4sensor one; Coal-winning machine must install machine-carried type CH
4cutoff instrument or portable CH
4detection alarm instrument; When gas density is more than 0.8%, work plane must stop operation, All Jobs personnel withdraw to fresh distinguished and admirable in, and to ore deposit scheduling report; Ascertain the reason after being disposed, can resume production when gas density is less than 0.8%; Respectively install a CO sensor at face upper corner angle, return air entrance to a lane, warning concentration is 24ppm; After occurring that CO reports to the police, should stop operation immediately, operating personnel evacuates to safety place rapidly, and after ascertaining the reason and being disposed, CO concentration is less than 24ppm, can resume production;
S3, during 301 working face extractions, wind supply quantity is 3500m
3about/min, plenum area per ten days carries out primary air flow mensuration to work plane, and measuring point is air intake lane, return airway, Nei Cuowei lane;
S4, to play slope to three in 301 work plane supratidal pond lanes and adopt return air and to go up a hill enabling, find and tunnel along 13# roof K3 limestone, with return airway parallel construction rock gangway, simultaneously apart from cutting a 360m place, from the climbing of tail lane to 13# roof, tunnel to cutting anti-pick after near eye, supporting is not carried out in naked lane, clear span 2.5m, clear height 2.4, section 6m
2, with roof at a distance of 30m, with 25m wrong in return airway;
S5, near mine return air well, set up grouting pumping plant, pipeline is gone up a hill via main return airway, three exploiting field return air, 301 work plane air return way, enters goaf, forms grouting fire extinguishing system;
S6, set up down-hole and to drill fast setting of casing system: fire extinguishing rig, electric coal drill, the 50mm drilling rod that can be used as sleeve pipe, the drill bit matched and sebific duct etc. are placed near gate top entrance;
S7, set up mining mobile grouting device system, place a slurry filling machine at gate top and lower gangway entrance respectively, should keep normal, immediately can transport place to use to according to actual needs.
S8, set up liquid carbon dioxide fire extinguishing system, adopt that mining mobile liquid carbon dioxide fire extinguishing device is lowered the temperature to heterogeneous goaf hidden danger point, inerting and datonation-inhibition.
S9, set up inhibition foam and vapour colloidal sol resistance chemoprevention fire extinguishing system, can retardant be brought into deep goaf.
2. high methane Goaf of Close Distance Coal Seams gas according to claim 1 and coal fire work in coordination with Prevention Technique, it is characterized in that, described grouting fire extinguishing system is made up of slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission and pipe network, and described slurrying materials quantitative conveying device, continuously filter pulp machine processed, pump for mortar transmission, pipe network are connected successively.
3. high methane Goaf of Close Distance Coal Seams gas according to claim 2 and coal fire work in coordination with Prevention Technique, it is characterized in that, described filter processed comprises quantitative feed and automatic filter pulp two parts processed, and soil is pressed 20m by described quantitative feed part
3the amount of/h evenly sends into filter pulp part processed automatically, and according to the required concentration of slurry proportioning water yield, and qualified slurries are made in stirring, automatically leach in slurries the solid particle being greater than 8mm.
4. high methane Goaf of Close Distance Coal Seams gas according to claim 1 and coal fire work in coordination with Prevention Technique, it is characterized in that, described mining mobile grouting device adopts ZHJ-5/1.8N Mobile anti-extinguishment grouting device, be positioned near down-hole grouting point, for adding composite colloid gelling agent.
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| CN106014480A (en) * | 2016-07-29 | 2016-10-12 | 山东唐口煤业有限公司 | Method for collaborative governance of gas and coal spontaneous combustion of fully-mechanized caving face with single thick coal seam |
| CN106096104A (en) * | 2016-06-02 | 2016-11-09 | 中国石油大学(华东) | The multifactorial oil refining apparatus gas detecting and alarming instrument addressing method for arranging of a kind of consideration |
| CN106894827A (en) * | 2017-03-28 | 2017-06-27 | 安徽理工大学 | The method that gas is prevented and treated during coal face back production |
| CN107859530A (en) * | 2017-11-07 | 2018-03-30 | 中国矿业大学(北京) | A kind of ultra close distance coal seam exploitation gas controls method altogether with coal spontaneous combustion |
| CN108678798A (en) * | 2018-03-01 | 2018-10-19 | 国家能源投资集团有限责任公司 | The control method of spontaneous combustion in goaf during being withdrawn for fully mechanized coal face |
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| CN110685728A (en) * | 2019-11-22 | 2020-01-14 | 安徽理工大学 | Coal seam goaf gas and coal spontaneous combustion cooperative control method |
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| CN111520180A (en) * | 2020-06-01 | 2020-08-11 | 淮南矿业(集团)有限责任公司 | Coal face rapid temperature measurement, fire prevention and extinguishing device and method |
| CN111677543A (en) * | 2020-06-23 | 2020-09-18 | 淮南矿业(集团)有限责任公司 | Comprehensive fire prevention method during recovery period of water-flooded easily spontaneous combustion coal face |
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| CN113218616A (en) * | 2021-06-07 | 2021-08-06 | 太原理工大学 | Physical experiment platform for simulating grouting partition air leakage of coal mine goaf |
| CN114112559A (en) * | 2021-11-30 | 2022-03-01 | 西安科技大学 | Goaf coal spontaneous combustion intelligent dynamic circulating gas sampling prevention and control method |
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