CN106437632A - Coal ore long goaf zone Vans drainage method - Google Patents
Coal ore long goaf zone Vans drainage method Download PDFInfo
- Publication number
- CN106437632A CN106437632A CN201610984846.2A CN201610984846A CN106437632A CN 106437632 A CN106437632 A CN 106437632A CN 201610984846 A CN201610984846 A CN 201610984846A CN 106437632 A CN106437632 A CN 106437632A
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- goaf
- gas
- extraction
- old
- drainage
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The application relates to coal ore long goaf zone Vans drainage method, comprising the steps that every goaf zone devises a group drainage hole, whose opening hole location sits at comparatively low pressure close wall neighborhood, drainage hole finish hole location sits at goaf zone upper Vans concentrate top floor fracture O shape ring inside; drainage construction chooses water deslagging, water deslagging method judges whether or not drainage hole drills in top floor fracture O shape ring; long goaf zone surrounding two sides distinct location places temporary wind control facility, temporary wind control facility adjusts surrounding two side close wall inside pressure diverseness, promotes goaf zone Vans flowing to drainage drill hole side; drainage pipe route installs safe monitoring facility and powder dusting explosion repressing device and increases safety of long goaf zone Vans drainage. The application provided Vans drainage method constructs and drills hole in long goaf zone under production ore well, lowers risk of long goaf zone Van leaking to tunnel inside, turns waste to usable, increases exploitation of Vans resource quantity.
Description
Technical field
The present invention relates to coal mine gas develops a kind of gas pumping method in field, the especially a kind of old goaf in colliery
Gas pumping method.
Background technology
Coal-bed gas are a kind of association products in coalification course, and major part is stored in coal seam with ADSORPTION STATE.It is coal
Major casualty source in ore deposit production process, its main component CH4 is stronger greenhouse gases, but while is also a kind of cleaning energy
Source and high-quality industrial chemicals.Therefore, gas is developed, subterranean resource can have both been made full use of, mine safety can be improved again
Condition and increase economic efficiency, to alleviating the pressure of conventional gas and oil supply, implementing national economy sustainable development strategy, drop
Low highly important meaning is respectively provided with because of its greenhouse effect for producing to air loss etc..
After coal work face closure, the gas for being capable of release desorbing in its Affected areas by mining is referred to as old goaf gas.
According to statistics, current China there are about 500 State owned coal mines and close, and wherein 70% is high methane colliery, preservation in old goaf
Gas resources be up to thousands of billion cubic meters.Therefore old goaf gas are carried out with methane drainage and utilization project there is very significant economic effect
Benefit, social benefit and environmental benefit.
At present, old goaf is mainly from ground to construction ground drilling well in the fissure zone of goaf top with the old dead zone watt of extraction
This.For the old lower goaf coal-bed gas of extraction, generally required ground drilling penetrate old goaf enter underlying seam enter
Row gas pumping.This kind of method only can the single old dead zone gas of extraction, and due to needing to penetrate old goaf, this kind of method
During wellbore construction, difficulty of construction is big, accident rate is high, one-tenth porosity is low, and mash gas extraction yields poorly and high cost.Application number
Chinese patent for 201510055357.4 discloses one kind and penetrates the old goaf of the old goaf abandoned coal pillar extraction multilamellar of multilamellar
The method of remaining gas, from ground to abandoned coal pillar construction ground drilling well, and penetrates all abandoned coal pillars.When abandoned coal pillar width
Compared with hour, ground drilling penetrate after abandoned coal pillar directly with old dead zone insertion.When abandoned coal pillar width is larger, ground drilling is worn
Abandoned coal pillar is to abandoned coal pillar base plate thoroughly, and being inserted into external stability from ground to drilling well has the steel pipe of high pressure pouch to residual coal
Column bottom；High-pressure hose is connected with high pressure pouch, and extends to ground；Through high-pressure hose, hydraulic pressure is entered high pressure pouch, formed
High-Pressure Water is subsequently injected drilling well through steel pipe by sealing of hole sections, after pressure break abandoned coal pillar, high pressure pouch is discharged water release.Continue to wear
Thoroughly after other abandoned coal pillars, drainage tube is inserted into from ground to drilling well, remaining coal bed gas in the old dead zone of extraction.The method is by ground
Construction ground drilling well penetrates abandoned coal pillar.The Chinese patent of Application No. 201510468722.4 discloses a kind of old dead zone extraction
The system and method for coal bed gas, to the coal column construction extraction drilling well between the cavity of adjacent goaf, is sequentially sent to drainage tube, slip casting
Pipe；Valve III is opened, and injection cement mortar forms a closed space with coal column, valve I opened by ground N2 air accumulator warp
Cross gas boosting pump and be pressurized to air injection pipe and inject N2, pressure break coal column；Valve II is opened, by ground extraction station through drainage tube to coal seam
Gas carries out extraction, and records computer inspection for A；When coal seam throughput drops to the 30% of computer inspection A again
N2 is gas displacing coal-bed for repetition, until when coal seam throughput finally drops to the 16% of computer inspection A, closing valve II and stopping
Only coal bed gas extraction.Said method needs substantial amounts of equipment investment all from ground drilling, meanwhile, directly opened in fissure zone
Adopt task difficulty higher, safeguard that ground drilling expense is larger, earning rate is low.And the method for current underground mining drilling is also only
It is perforate mash gas extraction near the fire dam, gas density is low, and economic well-being of workers and staff is relatively low.
Content of the invention
The invention provides a kind of pumping method for the old goaf gas in extraction colliery, comprises the following steps：
One group of extraction borehole is designed in each goaf, and extraction borehole position of opening is located near the relatively low fire dam of air pressure,
Drilling borehole bottom location is located at the region of goaf top gas enrichment；
With water method for discharging residue, selection water deslagging during drilling construction, by judging whether drilling has been crept into goaf top gas
The region of enrichment；
Draught head within the walls is closed in regulation both sides, promotes goaf gas to flow to extraction borehole side；
Safety precaution is carried out to old goaf gas extraction.
Preferably, the gas air-flow high-pressure area is roof fracture "O"-ring region.
In any of the above-described scheme preferably, extraction borehole end aperture is located at roof fracture "O"-ring.Due to old
Goaf fissure zone has abundant gas resources, and nearby gas density is high for roof fracture "O"-ring, therefore by the end of drilling
Hole is arranged at roof fracture "O"-ring gas density height during gas production, and flow is big.
In any of the above-described scheme preferably, extraction borehole end aperture is located at the upper bound of roof fracture "O"-ring
At least one position between face, lower interface or upper and lower interface.
In any of the above-described scheme preferably, the extraction borehole preferably three, the whole aperture of three boreholes is divided
Not Wei Yu interface in roof fracture "O"-ring, lower between interface and upper and lower interface.The number of the drainage holes can be according to reality
Exploitation situation, it is also possible to preferably less than three, be preferably one or two, it is also possible to be preferably according to actual exploitation situation
More than three, preferably four, five or more.
In any of the above-described scheme preferably, the roof fracture "O"-ring is 3 to 5 times of mining heights, the extraction borehole
Whole aperture height is respectively in 3 to 5 times of mining height regions of roof.The whole hole height in the exploitation hole is according to roof fracture " O "
Type circle determines, when roof fracture "O"-ring is 3 to 4 times of mining heights, the extraction borehole end aperture height is respectively away from roof
In 3 to 4 times of mining height regions.
In any of the above-described scheme preferably, the extraction borehole is hole height three, whole respectively away from roof 3
Again, 3.5 times, 5 times of mining heights, preferably whole hole height is respectively away from 3 times of roof, 3.5 times, 4 times of mining heights.
In any of the above-described scheme preferably, mistake goaf 10m, 15m, 20m in three extraction boreholes difference.
In any of the above-described scheme preferably, with water deslagging simultaneously, creep into not returning water to the perforate mouth.
In any of the above-described scheme preferably, interim air controller is set, reduces old goaf extraction borehole side closed
The outer air pressure of wall, while increase the outer air pressure of opposite side fire dam.
In any of the above-described scheme preferably, interim air controller is located at the unsealed side of fire dam, controls wind temporarily
Device is arranged on old goaf both sides diverse location.
In any of the above-described scheme preferably, interim control wind facility is the regulation wind window for arranging in the crossheading of goaf, institute
State regulation wind window and be preferably disposed on distance in crossheading and traverse at 10 to 30 meters, preferably 20 meters.
In any of the above-described scheme preferably, extraction borehole is connected to mine lower negative pressure extraction system.
In any of the above-described scheme preferably, perforate mouth extraction negative pressure is 6 to 10KPa.
In any of the above-described scheme preferably, the safety precaution includes arranging security monitoring dress in extraction pipeline
Put.
In any of the above-described scheme preferably, the safety monitoring device includes the prison of spontaneous fire index gas concentration
Measurement equipment.
In any of the above-described scheme preferably, the monitoring device of the spontaneous fire index gas concentration include CO,
C2H2、C2H4And C2H6At least one in sensing device.
In any of the above-described scheme preferably, the safety precaution includes to install gas pumping parameter on extraction pipeline
In any of the above-described scheme preferably, the safety precaution includes to arrange explosion arrestment explosion suppression device.
In any of the above-described scheme preferably, the explosion arrestment explosion suppression device is the explosion arrestment explosion suppression device that dusts.
The invention provides a kind of pumping method for carrying out old goaf gas using the existing underground system in old goaf.
Present invention drilling is opened on the area of low pressure of goaf air leaking air-flow near fire dam, and drills to splitting with high concentration gas
Gap layer.The Advantageous Effects of the present invention are to overcome in prior art that degree of difficulty of mining on well is high, capital equipment puts into
Huge, later maintenance is difficult to and the existing technical problem that underground mining gas density is low, flow is little, improves old goaf watt
The safety of this extraction, while the gas of high concentration, big flow can be obtained, with considerable economic benefit and earning rate.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below by to be used needed for embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this area
For those of ordinary skill, without having to pay creative labor, can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is the roadway workface arrangement signal of the pumping method for the old goaf gas in extraction colliery of the present invention
The schematic diagram of one preferred embodiment；
Fig. 2 is a preferred reality of the pumping method goaf drainage holes plane for the old goaf gas in extraction colliery of the present invention
Apply the schematic diagram of example；
Fig. 3 is shown in the goaf drainage holes Fig. 2 according to the pumping method for the old goaf gas in extraction colliery of the present invention
The side view of embodiment；
Fig. 4 is the one of the regulation wind window set location of the pumping method for the old goaf gas in extraction colliery according to the present invention
The schematic diagram of preferred embodiment.
Reference：1 goaf, 2 work surfaces stop adopting line, 3 fire dams, and 4 traverse, 5 outer U air return way, 6 air return way, and 7
Adhesive tape crossheading, 8 auxiliary fortune crossheadings, 9 first regulation wind windows, 10 second regulation wind windows, 11 roof fracture " 0 " type circle, 12 coal seams.
Embodiment 1
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is this
Bright a part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
There is the every other embodiment for being obtained under the premise of making creative work, belong to the scope of protection of the invention.
According to the old goaf gas pumping method in colliery according to the present invention, the number that drills do not limit to in the present embodiment
Three, the position in the whole hole of drilling can be located at any region with high concentration gas in roof fracture "O"-ring region, and not limit to
Certain height in the present embodiment.
After work surface stops adopting, constitute 1 roof fracture "O"-ring 11 of goaf, methane gas by cutting eye, two lanes, stopping adopting line
Body density is lighter, rises near fissure zone, makes this region have the gas of height, and therefore crack "O"-ring 11 is gas
Extraction passage, after drilling is saturating with its ditch, can extraction go out the gas of high concentration, big flow.
The present invention provides a kind of pumping method for the old goaf gas in extraction colliery, with the premise that security is guaranteed
The gas of high concentration, big flow is gone out from old goaf extraction.
Embodiment 1 is a kind of preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Root
According to technical scheme, the whole aperture that drills in embodiment 1 is located at gas air-flow high-pressure area in goaf 1, preferably pushes up
Plate crack "O"-ring.In the present embodiment, whole aperture is located at roof fracture "O"-ring region, and whole hole height is respectively away from coal seam 12
3 times of top board, 3.5 times, 4 times of mining heights.
1 roof fracture "O"-ring of goaf, 11 height is received Roof rock feature, process for stoping, stops the more multifactor shadow such as time of adopting
Ring, which specifically highly has uncertainty.Selection water deslagging during drilling construction, selection water deslagging in technical scheme
Another effect be judge crept into roof fracture "O"-ring 11.In practical operation, when drilling is to top board
During the "O"-ring 11 of crack, deslagging current will be entered in roof strata crack, therefore do not return water as judgement drilling using hell
When whether having crept into the foundation, i.e. practice of construction to roof fracture "O"-ring 11, creep into not returning water to perforate mouth.
After goaf 1 is closed, can typically exist certain leak out, the size of inleakage is depending on the closed quality for closing wall
With the draught head of 1 both sides of goaf, goaf gas flow by high side to low side under the drive of the stream that leaks out and gather, most
Flowed to outside goaf 1 by the passage that leaks out eventually.The present invention utilizes this feature, improves in gas pumping method, profit
Flowed by high side to low side in the presence of the stream that leaks out with goaf gas and this feature is gathered, select the position of drilling
Put, improve concentration and the flow of gas drilling.Therefore when goaf gas extraction is carried out, for making gas arrange to extraction borehole
Side is flowed, and reduces the side by adequate measure and closes the outer air pressure of wall, while increasing opposite side to close the outer air pressure of wall.The present invention is by arranging
Interim control wind facility reaches above-mentioned purpose, i.e., reduce drilling arrangement crosswind pressure by arranging one regulation wind window, separately set one tune
Section air regulator increases opposite side and closes wall blast, so that the pressure reduction that stream low pressure is surveyed and high pressure is surveyed that leaks out increases, improves gas pumping
Concentration and efficiency.
In the present embodiment, as shown in figure 1, goaf 1 is provided with work surface and stops adopting line 2 after work surface stops exploitation,
Externally U air return way 5, air return way 6, adhesive tape crossheading 7 and auxiliary fortune crossheading 8 are all closed, its China and foreign countries U air return way 5 with
Air return way 6, adhesive tape crossheading 7 are with auxiliary fortune crossheading 8 by traversing 4（Connection roadway）Connection.
The distinguished and admirable flow feature that leaks out of goaf 1 shows, goaf gas can be with leaking out from high side to low side stream
Dynamic, and gather in low-pressure side, therefore, goaf gas extraction borehole is preferably arranged in the relatively low side of 3 internal gas pressure of fire dam.At this
In embodiment, according to the barometric surveying result in fire dam 3 and mining face under mine tunnel condition, select adhesive tape crossheading 7 with
Traversing in 4 between auxiliary fortune crossheading 8 arranges extraction borehole, as shown in Figures 2 and 3.Arrangement 1#, 2# and 3# totally 3 are traversed in 4 at this
Individual extraction borehole, the whole aperture of drilling is located in 12 roof fracture band of coal seam, whole hole height respectively away from 3 times of 12 top board of coal seam, 3.5
Again, 4 times of mining heights；Drilling borehole bottom location distinguishes interior mistake goaf 1 10m, 15m, 20m in plane projection.
As shown in figure 4, for promoting goaf gas to the side flowing of extraction borehole arrangement, according to 1 ventilating system of goaf
Feature, traverses in adhesive tape crossheading 7 and 6 distance of air return way and is respectively provided with the first regulation wind window 9, the second regulation wind window at 4 20m
10.After adhesive tape crossheading 7 arranges the first regulation wind window 9, equivalent to 3 outside of fire dam for making adhesive tape crossheading 7 and auxiliary fortune crossheading 8 all
In return in adhesive tape crossheading 7, the air pressure outside fire dam 3 is reduced.In the same manner, second being arranged in air return way 6 adjusts wind
After window 10, equivalent to the air intake for making on the outside of the fire dam 3 of outer U air return way 5 and air return way 6 all in outer U air return way 5
In, increased the air pressure outside fire dam 3.
Extraction borehole connection mine lower negative pressure extraction system in the technical scheme that the present invention is provided, aperture extraction negative pressure preferably exists
6 to 10KPa.
For ensureing the safety of old goaf gas extraction, the technical scheme that the present invention is provided adopts fully closed extraction
Method, and must be to CO, C2H2、C2H4、C2H6It is monitored Deng spontaneous combustion of coal index gas, it is found that goaf 1 is lost coal and had certainly
Extraction borehole is closed immediately during combustion tendency, stop extraction.While for further ensuring that safety, in old goaf gas extraction arm
Upper installing explosion arrestment explosion suppression device.
Embodiment 2
Embodiment 2 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Apply example 2 similar to 1 specific embodiment of embodiment.According to current coal mining empirical data, 1 roof fracture of goaf " O "
11 height of type circle is typically in 3 to 5 mining heights.Therefore, the technical scheme for being provided according to the present invention, the technical scheme that embodiment 2 is provided
In, one group of totally 3 extraction borehole is designed in each goaf 1（Boring aperture is calculated according to the extraction amount of design）, extraction brill
Hole position of opening is located near last one fire dam 3 in goaf 1, and the whole hole point of drilling is located at 1 roof fracture "O"-ring of goaf
11,1 10m, 15m, 20m of mistake goaf in difference, whole hole height is respectively away from 3 times of 12 top board of coal seam, 3.5 times, 5 times of mining heights.
Embodiment 3
Embodiment 3 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Apply example 3 similar to 1 specific embodiment of embodiment, difference is, in embodiment 3, goaf 1 roof fracture " O " type
The whole hole of circle 11 is highly hole height 6, whole respectively away from 4 times of 12 top board of coal seam, 4.5 times, 5 times of mining heights.
Embodiment 4
Embodiment 4 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Apply example 4 similar to 1 specific embodiment of embodiment, difference is, in example 4, goaf 1 roof fracture " O " type
The whole hole of circle 11 is highly hole height 8, whole respectively away from 3 times of 12 top board of coal seam, 3.5 times, 4 times, 4.5 times, 5 times of mining heights.
Embodiment 5
Embodiment 5 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Example 5 is applied with embodiment 1 using identical technical scheme, difference is, in embodiment 5, be promote 1 gas of goaf to
The side flowing of extraction borehole arrangement, according to the 1 ventilating system feature of goaf, traverses 4 in adhesive tape crossheading 7 and 6 distance of air return way
The first regulation wind window 9, the second regulation wind window 10 is respectively provided with 15m.
Embodiment 6
Embodiment 6 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Example 6 is applied to embodiment 1 with similar embodiment, difference is, in embodiment 6, be promote goaf gas to
The side flowing of extraction borehole arrangement, according to the 1 ventilating system feature of goaf, traverses 4 in adhesive tape crossheading 7 and 6 distance of air return way
Sending out, the first regulation wind window 9, the second regulation wind window 10 is respectively provided with 25m.
Embodiment 7
Embodiment 7 is a kind of another preferred embodiment of the pumping method for the old goaf gas in extraction colliery of the present invention.Real
Apply example 7 similar to 1 specific embodiment of embodiment, difference is, in embodiment 7, goaf 1 roof fracture " O " type
The number in the whole hole of 11 drilling of circle is 4, and whole hole height is respectively away from 3 times of 12 top board of coal seam, 3.5 times, 5 times of mining heights.
The present invention passes through to be drilled in the existing passage in goaf, it is to avoid directly drill in fissure zone, reduces and applies
Work difficulty, accident rate, while improve one-tenth porosity and mash gas extraction yield, reduce construction cost.While the present invention is bored
Hole is opened on the area of low pressure of goaf air leaking air-flow near fire dam 3, and drills to the crack layer with high concentration gas.?
Using old goaf internal hemorrhage due to trauma pathogenic wind stream feature while, the extraction side of the old goaf gas in extraction colliery provided by the present invention
Method also further reduces the outer air pressure of goaf air leaking stream low-pressure side fire dam, while increasing the outer air pressure of opposite side fire dam, enters
One step improves the concentration of the extraction of gas and flow.With considerable economic benefit and earning rate.
Claims (10)
1. a kind of pumping method for the old goaf gas in extraction colliery, comprises the following steps：
One group of extraction borehole is designed in each goaf, and extraction borehole position of opening is located at relatively low closed of old goaf air pressure
Near wall, the borehole bottom location that drills is located at the region of goaf top gas enrichment；
With water method for discharging residue, selection water method for discharging residue during drilling construction, by judging whether drilling has been crept into the goaf
The region of portion's gas enrichment；
Draught head within the walls is closed in regulation both sides, promotes goaf gas to flow to extraction borehole side；
Safety precaution is carried out to old goaf gas extraction.
2. the pumping method of old goaf gas as claimed in claim 1, it is characterised in that the gas rich region is for pushing up
Plate crack "O"-ring region.
3. the pumping method of old goaf gas as claimed in claim 2, it is characterised in that the whole aperture position of the extraction borehole
At least one position between the upper interface of roof fracture "O"-ring, lower interface or upper and lower interface.
4. the pumping method of old goaf gas as claimed in claim 3, it is characterised in that the extraction borehole is three,
Three borehole borehole bottom locations are located at interface in roof fracture "O"-ring respectively, lower between interface and upper and lower interface.
5. the pumping method of old goaf gas as claimed in claim 3, it is characterised in that the roof fracture "O"-ring
For 3 to 5 times of mining heights, the extraction borehole end aperture height is respectively in 3 to 5 times of mining height regions of roof.
6. the pumping method of old goaf gas as claimed in claim 5, it is characterised in that the extraction borehole is three,
Whole hole height is respectively away from 3 times of roof, 3.5 times, 5 times of mining heights.
7. the pumping method of old goaf gas as claimed in claim 6, it is characterised in that three extraction boreholes are distinguished
Interior mistake goaf 10m, 15m, 20m.
8. the pumping method of old goaf gas as claimed in claim 1, it is characterised in that with water deslagging simultaneously, creep into
Till the perforate mouth does not return water.
9. the pumping method of old goaf gas as claimed in claim 1, it is characterised in that interim air controller is set, is dropped
The outer air pressure of low old goaf extraction borehole side fire dam, while increase the outer air pressure of opposite side fire dam.
10. the pumping method of old goaf gas as claimed in claim 9, it is characterised in that the interim air controller sets
Put in old goaf both sides diverse location.
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| CN107035401A (en) * | 2017-05-26 | 2017-08-11 | 中节能宁夏新能源股份有限公司 | A kind of abandoned mine fire damp administers new technology |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN107227954A (en) * | 2017-07-08 | 2017-10-03 | 西安科技大学 | A kind of goaf coal spontaneous combustion three is with rapid scan and analysis method |
| CN108533223A (en) * | 2018-02-12 | 2018-09-14 | 太原理工大学 | A kind of underground goaf residual coal bed gas methane drainage and utilization project system |
| CN109854294A (en) * | 2019-03-29 | 2019-06-07 | 中国矿业大学 | A kind of flue gas displacement enhancing goaf gas extraction and goaf prevent and treat fire method |
| CN110286207A (en) * | 2019-06-28 | 2019-09-27 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of cacoplastic judgment method of coal body |
| CN111022108A (en) * | 2019-12-24 | 2020-04-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for extracting gas in goaf |
| CN112943347A (en) * | 2021-03-17 | 2021-06-11 | 太原理工大学 | Multi-source gas efficient pre-extraction rapid outburst elimination method in middle-layer residual coal re-mining tunneling process |
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| CN107035401A (en) * | 2017-05-26 | 2017-08-11 | 中节能宁夏新能源股份有限公司 | A kind of abandoned mine fire damp administers new technology |
| CN107035401B (en) * | 2017-05-26 | 2018-04-10 | 中节能宁夏新能源股份有限公司 | A kind of abandoned mine fire damp administers new technology |
| CN107227954A (en) * | 2017-07-08 | 2017-10-03 | 西安科技大学 | A kind of goaf coal spontaneous combustion three is with rapid scan and analysis method |
| CN108533223A (en) * | 2018-02-12 | 2018-09-14 | 太原理工大学 | A kind of underground goaf residual coal bed gas methane drainage and utilization project system |
| CN109854294A (en) * | 2019-03-29 | 2019-06-07 | 中国矿业大学 | A kind of flue gas displacement enhancing goaf gas extraction and goaf prevent and treat fire method |
| CN110286207A (en) * | 2019-06-28 | 2019-09-27 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of cacoplastic judgment method of coal body |
| CN111022108A (en) * | 2019-12-24 | 2020-04-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for extracting gas in goaf |
| CN112943347A (en) * | 2021-03-17 | 2021-06-11 | 太原理工大学 | Multi-source gas efficient pre-extraction rapid outburst elimination method in middle-layer residual coal re-mining tunneling process |
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