CN109578055A - A kind of coal and CO2The control method of prominent accident - Google Patents
A kind of coal and CO2The control method of prominent accident Download PDFInfo
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- CN109578055A CN109578055A CN201811390560.7A CN201811390560A CN109578055A CN 109578055 A CN109578055 A CN 109578055A CN 201811390560 A CN201811390560 A CN 201811390560A CN 109578055 A CN109578055 A CN 109578055A
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- 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
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention belongs to mining area safety technical field, a kind of coal and CO are disclosed2The control method of prominent accident includes regional control method and local anti-burst method；The coal and CO2The regional control method of prominent accident: exploitation protective layer, using from top to bottom, move towards the coal-mining method of longwell, high-dipping horizontal slice Sub-Level Caving, whole caving methods processing goaf top plates；Utilize horizontal main entry, inter-road and CO2It is taken out in advance in extraction lane.Advantages of the present invention and good effect are as follows: coal (rock) provided by the invention and CO2The control method of prominent accident, CO2Control measures, which obtain looking into, lacks supplement and perfect, and the mining area Yao Jie in next step will more effective more targeted improvement CO2Prominent accident is reduced, while being other mines both at home and abroad with similar geological disaster to CO2Source decision analysis and improvement are made to use for reference and instruct work.
Description
Technical field
The invention belongs to mining area safety technical field more particularly to a kind of coals and CO2The control method of prominent accident.
Background technique
Currently, the prior art commonly used in the trade is such that
In nature, as the CO of people and animals and plants breathing2It, can under certain condition when from curtain pressure vessel source and largely at hiding
Cause to spray disaster, day and night such as August 21 in 1986, the CO from curtain source excess2Gas is suddenly from the Cameroon for being located at volcanic crater
Ni Aosi sprays in lake；China found in the basins such as loose the Liao Dynasty, Bohai Sea Gulf, northern Suzhou, Guangdong San Shui, the East Sea and Northern Part of South China Sea 30
Multiple curtain pressure vessels source CO2In gas field, three piece of water sand head country fair of Guangdong constructs 9 well of the depth of water on May 22nd, 1977, bores and meets the Mesozoic group
When limestone solution cave, the CO that mixes from curtain pressure vessel source2Strong blowout occurs.In addition to this, when from curtain pressure vessel source and certain originals
Because of the CO of generation2After penetrating into coal measure strata, CO2It also happens occasionally with coal petrography protrusion, such as in world's coal mining history, from 1894
The first dant and CO has occurred in the lower Silesia coal mine of year Poland2After protrusion, Australian New South Wales south Sydney Basin
Excessive dant and CO occurs with the Queensland state basin Bao Wen coal measures2Match big interior coal mine, Greece in prominent, France the Nice Sa Wen area
Big La Kuang and the ground such as Czechoslovakia coal petrography and CO all occurred2It is prominent.China is since 1969, the northeast mining area Ying Cheng
Battalion Cheng Jiujing, five wells, Yan Bian and imperial coal mine and coal petrography repeatedly also occurs for Yaojie, Gansu and CO2 is prominent.Due to seeking city mine at that time
Area is to CO2Prominent mechanism lacks correct understanding, and coal resources are deficient in addition, and mining conditions are again poor, thus country to its into
Closing is gone.
It is domestic that Yaojie, Gansu coalfield is located at Lanzhou Honggu District, mining area 13km long from south to north, the wide 1.5~4.5km of thing, area
30.7km2；The mining area is the whole nation uniquely in the CO of production2The abundant Typical Mining but also with coal petrography and the prominent condition of CO2 of preservation,
Existing three mines in mining area, golden river coal mine (Yuan Yikuang), three mines (Yuan Erkuang, three mines and river deer ditch mine conformity and merger) He Haishi
Great coal petrography and the prominent accident of CO2 all once occurred for gulf coal mine；According to statistics, CO has occurred altogether since 19772Prominent accident 14
It is secondary, add up dead 136 people.
CO occurs for each mine in kiln street2From the point of view of the place of prominent accident, mainly when accidentally wearing fault tectonic and accidentally exposed coal layer,
Working procedure mainly occurs in shot firing operation.
According to the complexity that kiln street coal field geology constructs, CO2The particularity in source, according to high CO2Content is projecting coal bed low
The improvement strategy of safe digging under concentration low-pressure state, exploitation protective layer and regionality CO2Layer extraction is worn as " life
Line " engineering, using stone door punching coal and getting working face part protrusion-dispelling as routine work.
Past kiln street coal mine does not prevent and treat the feature and rule that co2 is prominent or the method that uses later does not catch co2 prominent
Rule, so so much accident so much people in the dust occurs.
Over nearest more than 20 years, the increase of CO2 emissions causes the loss, greenhouse effects aggravation and the whole world of ozone layer
Property climate change, the global environmental problems such as acid rain are on the rise.Human environment and sustainable economic development is set to face sternness
Challenge.
It is the technology with extensive reduction of greenhouse gas discharge potentiality that CO2, which is sealed up for safekeeping,.Develop carbon capture, using and seal up for safekeeping,
It is effectively to control an important measure of greenhouse gas emission under the reality in China's energy resource structure based on coal, and have
Low-carbon, the intensive utilization for helping realize the high carbon resources such as coal, petroleum, promote the maximum discharges industries such as electric power, coal chemical industry, oil gas
Transition and upgrading, drive the development of other related industries, to coped with for a long time in China climate change, promote low carbon development have
Significance.Currently, carbon capture, using and seal the technical research of each link up for safekeeping and obtained remarkable break-throughs, but still there are costs
With the problems such as energy consumption is high, long-term safety and reliability are still to be tested, carrying out experiment and demonstration had both facilitated to solve by putting into practice
Various problems and the technological direction scale and commercial applications present in technology development play its extensive greenhouse
The necessary link of gas abatement potentiality.
Currently, coal mine filling technology is widely used in the filling of discarded coal mine, filling solidifies the mine after stablizing will
Surface collapse and depression problem are avoided, China's abandoned well bring geological disaster is substantially avoided, produces huge
Social benefit and economic benefit.The exploitation of coal mine filling material filling, inhibits the dynamic phenomenon of coal seam and roof and floor, improves mine peace
Full degree of protection；Coal is pressed to recycling " under three " (under building, under railway, under water body), extends mine service-life (according to incomplete
Estimation, State owned coal mine " under three " pressure coal amount are up to 17,900,000,000 tons or more, and especially the provinces such as Hebei, Shandong " under three " press coal to account for
Mining resources amount is more than half), mitigate influence of the coal mining to earth's surface, prevent surface subsidence, reduces cultivated land occupancy and mine
Area's village migration has a certain effect, but current fill method all exists that filler source is difficult, filler is at high cost
The defects of.
In conclusion problem of the existing technology is: in the prior art, CO2Control measures cannot be looked into effectively
Lack supplement and perfect, CO2Prominent accident is stepped up.
Because though existing technology takes the control method without digging production that drill inspection and stopping are blown out, CO2
Prominent accident is not inherently eliminated, and it is possible to even more serious accident can occur, the reason is that not catching CO2It is prominent
The rule and feature of accident；
After solution, make CO2It administers more targetedly, more effectively.
Solve the difficulty and meaning of above-mentioned technical problem:
CO2Prominent accident is a kind of dynamic phenomenon that coal mine occurs, it is sprayed big in a very short period of time from getting working face
Amount coal (rock) and carbon dioxide: coal (rock) outstanding is full of tens meters of even longer tunnels of meeting head on, and coal (rock) has apparent point
Phenomenon is selected, equipment and staff are buried；Carbon dioxide outstanding is gathered in tunnel bottom and energy inverted air current sprawling km or more,
Since carbon dioxide is asphyxiant gas, more people's injures and deaths can be caused in range involving.
The problem to solve the above problems, first is that grasping prominent omen: there are apparent Ground pressure activity, such as top plate in prominent preceding tunnel
Rock slabbing, coal wall (side) wall caving, coal (rock) soften, and Floor Heave in Roadway will appear cavity in front of working face sometimes.In addition, prominent
CO in preceding tunnel2Gush out increase, distinguished and admirable middle CO2Concentration becomes larger, and bubbles in roadway floor ponding, and often there is CO in tunnel in crack2
The squeak gushed out blows out rear tunnel bottom and gathers high concentration CO2Layer.
Second is that prominent probability analysis: after above-mentioned omen occurs in tunnel, geological conditions locating for tunnel, such as tomography should be analyzed
Band, crustal stress concentration zones, geological structure exceptions area；Study CO2Gas componant, pressure judge source and increment.
Third is that reinforcing CO2Detection: it in coal exploration, new well construction, new height development stretching, is visited while detecting gas
Survey CO2Gas analyzes gas componant, determines whether outburst danger；CO is carried out simultaneously in gas ranks of mine identification2Check and
Identification, and to CO2The origin cause of formation and distribution are researched and analysed.
Above-mentioned several points are grasped, corresponding precautionary measures are taken, can effectively prevent CO2The generation of prominent accident, is reduced
Prominent accident bring loss and casualties.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of coal (rock) and CO2The control method of prominent accident,
The invention is realized in this way a kind of coal (rock) and CO2The control method of prominent accident, includes regional control side
Method and local anti-burst method.
Regional control method, including exploitation protective layer, utilize horizontal main entry, inter-road and CO2It is taken out in advance in extraction lane.
Local anti-burst method, including the advanced prospecting bit hole prediction of coal (rock) lane driving face, coal face projection prevention measure,
Crossdrift exposes coal seam control measure and coal (rock) lane driving face passing fault outburst prevention measures.
Another object of the present invention is to provide coal (rock) and CO2The regional control method of prominent accident, specifically includes
Following steps:
Step 1: exploitation protective layer, using from top to bottom, move towards longwell, high-dipping horizontal slice (or inclined cuting layering) is put
The coal-mining method of top coal, whole caving method processing goaf top plates；
Step 2: horizontal main entry, inter-road and CO are utilized2It is taken out in advance in extraction lane.
Further, in step 2, horizontal main entry, inter-road and CO are utilized2Extraction lane is taken out in advance, is specifically included:
(1) roadway opening is arranged around protrusion-dispelling；
(2) it arranges that drilling is pre- in construction tunnel to take out；
(3) CO is utilized2Extraction lane and mobile pumping are put.
Further, the roadway opening in step 2 is arranged around protrusion-dispelling, specifically:
1) according to exploitation the characteristics of, use it is point horizontal, stage by stage, along bearing in the bottom plate away from 20~30m of coal seam
Arrange horizontal main entry, inter-road in rock, the stage hangs down high 50m；
2) horizontal main entry, inter-road early period, mid-term was as air inlet and transportation roadway, later period conduct as extraction lane in use
Air return lane, a lane are multi-purpose.
Further, the pre- pumping of drilling is arranged in construction tunnel in step 2, specifically:
1) every 50m arranges 1 extraction drill site, in time by design and construction extraction drilling, construction 1 after each drill site construction
Group, 1 group of extraction；
2) drilling arrangement is spatially intersected, and horizontal plane face is fan-shaped layer-through drilling arrangement, and drill hole density is according to having
Drainage radius 12m is imitated to determine；
3) aperture usesUsing cement and numb sealing of hole, each drilling holes at the drilling yard is connected with main line using branch pipe is intersected
It connects, drill site installs moisture trap or outlet gate；
4) divide horizontal subsystem installation digital gas flowmeter to be measured, acquire gas sample weekly and carry out extraction concentration point
Analysis.
Further, CO is utilized in step 22Extraction lane and mobile pumping are put, specifically:
Different types of outburst danger region and guard key region are divided, construct dedicated CO2Drainage roadway is arranged close
Collection drilling after having constructed, does closed pre-buried releasing pipe in entrance to a lane and discharge tube carries out extraction；When extraction region is relatively independent,
Flexible mobile pumping can be used to put.
Another object of the present invention is to provide coal (rock) and CO2The local anti-burst method of prominent accident, specifically includes:
Step 1: Driving Face in Coal Tunnel preceding prospecting bit hole prediction in advance；
Step 2: coal face projection prevention measure, along advance of the face direction, every 10~50m is done twice according to the actual situation
Validity check；
Step 3: crossdrift exposes coal seam control measure, before crossdrift goes into operation, it is necessary to provide gas (CO to construction team2)
The technical data such as geology specification control coal seam position with preceding prospecting bit hole, measure CO2Content；
Step 4: coal rock tunnel driving face passing fault.
Further, in step 1, Driving Face in Coal Tunnel preceding prospecting bit hole prediction in advance, specifically:
(1) before coal road construction, 4~9 apertures first are arranged in working face30~75m of hole depth it is advanced before
Visit prediction drilling；Sampling analysis gas component, and measure a ton coal CO2The Failure type of content, coal seam solid coefficient and coal, root
Parameter according to surveying and determination and the protrusion dynamic phenomenon during drilling come comprehensive judgement coal seam, and whether there is or not outburst dangers；Confirmation drilling control
Without CO in range2Abnormal Methane Emission, CO2Content < 5m3/ t, and retain enough prominent 5m predictions and tunneled away under conditions of in advance
Construction；
(2) K is measured using method of drilling index in tunneling process1It is worth (or △ h value) and coal powder quantity of bore S carries out validity check；
Further, in the mining process in step 1, the safety prevention measure of use are as follows:
1) twice isolation protrusion-dispelling air door is constructed in air inlet；
2) it is blown out at a distance outside protrusion-dispelling air door when big gun is dug, operation can be carried out after blowing out rear 30min confirmation normally；
3) sole duty watt inspection person's running check gas (CO is set2)；
4) by regulation be arranged compressed air self-help, driving distance be more than 500m tunnel in must be provided with temporary shelter chamber；
5) independent ventilating system is established, outburst prevention work face return air is introduced directly into total return air；
6) protrusion-dispelling technical staff checks the implementation of conditions of live measures daily.
Further, the validity check twice in step 2, specifically:
1) when examining, arrange that 1 prediction drills every 10~15m on working face wall, bore diameter 42mm, deep 8~
10m, measurement drilling coal powder quantity of bore；
2) coal powder quantity of bore S<6kg/m continues back production, in back production, it is necessary to there are the prediction of>=3m drilling in advance away from；
3) when coal powder quantity of bore S >=6kg/m, then outburst danger it has been predicted as, it is necessary to take effective outburst prevention measures, spy before such as beating
Drilling, Vibration shot, static pressure water filling etc..
Further, in step 3, crossdrift exposes coal seam control measure, specifically includes:
(1) when roadway construction to away from seat earth minimum normal 10m apart from when, construct one group of at least five aperture
Drilling, coring is carried out in accordance with regulations, accurately controls coal seam position；
(2) measurement coal seam ton coal CO2Content, CO2Pressure, CO2The parameters such as the solid coefficient of diffusion initial speed and coal, sentence
Disconnected outburst hazard；
(3) driving starts exploration and digging and accurately grasps coal seam position to away from seat earth minimum normal 5m；
(4) driving once opens coal seam to away from seat earth minimum normal 2m.
Further, in step 4, coal rock tunnel driving face passing fault is specifically included:
(1) tomography that drop is more than coal seam thickness is encountered in front of Driving Face in Coal Tunnel, should be held by the measure of stone door punching coal
Row；
(2) when roadway construction to away from seat earth minimum normal 20m apart from when, pry into the drilling of tomography, hole depth requires to visit
To tomography and enter 10 meters of tomography only, judges outburst hazard；
(3) before being from drilled into after tomography to driving to tomography, in addition to continuing to execute measure effect and examining, team's per tour is tunneled
No less than 3 spy eyes will be beaten, visiting eye depth coal road cannot be less than 8 meters, and rock gangway cannot be less than 4 meters, and reserved not less than 2 meters
It is advanced away from.
In conclusion advantages of the present invention and good effect are as follows: coal (rock) provided by the invention and CO2Prominent accident is prevented
Control method, CO2Control measures, which obtain looking into, lacks supplement and perfect, and the mining area Yao Jie in next step will more effective more targeted improvement CO2
Prominent accident is reduced, while being other mines both at home and abroad with similar geological disaster to CO2Source decision analysis and improvement are made
Use for reference and instruct work.
Co2 and coal (rock) prominent not ready-made control measure, but use for reference gas preventing and control method and combine Co2 and coal
(rock) outstanding feature administers co2, meets co2 preservation property and special by constantly summarizing and improving to have preliminarily formed for many years
The control method of point and measure make existing CO2 control measures obtain looking into and lack supplement and perfect, and CO2 administers more targeted, and take
Obtained remarkable effect.So being also other mines both at home and abroad with similar geological disaster to the source CO2 decision analysis and improvement
Make to use for reference and instruct work.
Since the fifties are on the books, Jilin Ying Cheng and Yaojie, Gansu have occurred in no co2 control measures age for the country
Repeatedly protrude the more people of death by accident；Since the seventies have and administer co2 measure, although also drill detect, stop blowing out and
Stop the administering method of digging, but multiple accident has occurred, such as 1977 to 2007, it is prominent that co2 occurs altogether for the mining area Yao Jie
Accidents happened 14 times, adds up dead 136 people (former table).And in recent years, on the basis of summarizing forefathers' management experience, using we
Ruling by law reason co2, realizes zero accident zero death, and never because co2 influences production, Safety of Coal Mine Production has gone on benign track.
CO occurs for 1 coalfield Yao Jie of table2Prominent accident statistics
(1) co2 is administered using this method, the co2 sucrose extraction available 65% or more in coal seam, most of co2 is taken out
Out.After measured, after region is taken out in advance, remaining co2 content is 1.1~2.1m 3/t；After local outburst prevention measures, remaining co2 contains
Amount substantially conforms to regulation regulation.Co2 is reduced to critical value hereinafter, safety greatly improves when digging laneway；Co2 is dense when coal mining
Degree is also reduced to safe range；After coal seam pressure reduction simultaneously, coal working face strike length can be greatly increased, and especially work
It is even longer that face length by the 50m of early stage extends 110m till now.
Detailed description of the invention
Fig. 1 is coal provided in an embodiment of the present invention (rock) and CO2The regional control method flow diagram of prominent accident.
Fig. 2 is the local anti-burst method flow chart of coal provided in an embodiment of the present invention (rock) and the prominent accident of CO2.
Fig. 3 is regional control CO provided in an embodiment of the present invention2Exploitation protective layer and bottom plate extraction drilling arrangement.
Fig. 4 is regional control CO provided in an embodiment of the present invention2CO2Extraction lane.
Fig. 5 is local control CO provided in an embodiment of the present invention2Driving face measure effect examine schematic diagram.
Fig. 6 is local control CO provided in an embodiment of the present invention2Stope predict schematic diagram.
Fig. 7 is local control CO provided in an embodiment of the present invention2Stone door punching coal, Driving Face in Coal Tunnel effect inspection hole arrangement
Schematic diagram.
Fig. 8 is kiln street coalfield structure sketch map provided in an embodiment of the present invention.
Fig. 9 is composite columnar section provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is described in detail with reference to the accompanying drawing.
Coal (rock) provided in an embodiment of the present invention and CO2The control method of prominent accident, include regional control method and
Local anti-burst method.
As shown in Figure 1, coal (rock) provided in an embodiment of the present invention and CO2The regional control method of prominent accident is specific to wrap
Include following steps:
S101: exploitation protective layer, using from top to bottom, move towards longwell, high-dipping horizontal slice (or inclined cuting layering) caving
The coal-mining method of coal, whole caving method processing goaf top plates；
S102: horizontal main entry, inter-road and CO are utilized2It is taken out in advance in extraction lane.
It is provided in an embodiment of the present invention to utilize horizontal main entry, inter-road and CO in step S1022Extraction lane is taken out in advance, tool
Body includes:
(1) roadway opening is arranged around protrusion-dispelling；
(2) it arranges that drilling is pre- in construction tunnel to take out；
(3) CO is utilized2Extraction lane and mobile pumping are put.
In step S102, roadway opening provided in an embodiment of the present invention is arranged around protrusion-dispelling, specifically:
1) according to exploitation the characteristics of, use it is point horizontal, stage by stage, along bearing in the bottom plate away from 20~30m of coal seam
Arrange horizontal main entry, inter-road in rock, the stage hangs down high 50m；
2) horizontal main entry, inter-road early period, mid-term was as air inlet and transportation roadway, later period conduct as extraction lane in use
Air return lane, a lane are multi-purpose.
It is provided in an embodiment of the present invention that the pre- pumping of drilling is arranged in construction tunnel in step S102, specifically:
1) every 50m arranges 1 extraction drill site, in time by design and construction extraction drilling, construction 1 after each drill site construction
Group, 1 group of extraction；
2) drilling arrangement is spatially intersected, and horizontal plane face is fan-shaped layer-through drilling arrangement, and drill hole density is according to having
Drainage radius 12m is imitated to determine；
3) aperture usesUsing cement and numb sealing of hole, each drilling holes at the drilling yard is connected with main line using branch pipe is intersected
It connects, drill site installs moisture trap or outlet gate；
4) divide horizontal subsystem installation digital gas flowmeter to be measured, acquire gas sample weekly and carry out extraction concentration point
Analysis.
It is provided in an embodiment of the present invention to utilize CO in step S1022Extraction lane and mobile pumping are put, specifically:
Different types of outburst danger region and guard key region are divided, construct dedicated CO2Drainage roadway is arranged close
Collection drilling after having constructed, does closed pre-buried releasing pipe in entrance to a lane and discharge tube carries out extraction；When extraction region is relatively independent,
Flexible mobile pumping can be used to put.
As shown in Fig. 2, coal (rock) provided in an embodiment of the present invention and CO2The local anti-burst method of prominent accident, it is specific to wrap
It includes:
S201: Driving Face in Coal Tunnel preceding prospecting bit hole prediction in advance；
S202: coal face projection prevention measure, along advance of the face direction, every 10~50m does and imitates twice according to the actual situation
Fruit is examined；
S203: crossdrift exposes coal seam control measure, before crossdrift goes into operation, it is necessary to provide gas (CO to construction team2)
The technical data such as matter specification control coal seam position with preceding prospecting bit hole, measure CO2Content；
S204: coal rock tunnel driving face passing fault.
In step S201, Driving Face in Coal Tunnel provided in an embodiment of the present invention preceding prospecting bit hole prediction in advance, specifically:
(1) before coal road construction, 4~9 apertures first are arranged in working faceThe advanced preceding spy of 30~75m of hole depth
Prediction drilling；Sampling analysis gas component, and measure a ton coal CO2The Failure type of content, coal seam solid coefficient and coal, according to
The parameter of measurement and the protrusion dynamic phenomenon during drilling come comprehensive judgement coal seam, and whether there is or not outburst dangers；Confirmation drilling control model
Enclose interior no CO2Abnormal Methane Emission, CO2Content < 5m3/ t, and retain enough prominent 5m and predict that carrying out driving away under conditions of in advance applies
Work；
(2) K is measured using method of drilling index in tunneling process1It is worth (or △ h value) and coal powder quantity of bore S carries out validity check；
In step S201, in mining process provided in an embodiment of the present invention, the safety prevention measure of use are as follows:
1) twice isolation protrusion-dispelling air door is constructed in air inlet；
2) it is blown out at a distance outside protrusion-dispelling air door when big gun is dug, operation can be carried out after blowing out rear 30min confirmation normally；
3) sole duty watt inspection person's running check gas (CO is set2)；
4) by regulation be arranged compressed air self-help, driving distance be more than 500m tunnel in must be provided with temporary shelter chamber；
5) independent ventilating system is established, outburst prevention work face return air is introduced directly into total return air；
6) protrusion-dispelling technical staff checks the implementation of conditions of live measures daily.
In step S202, validity check twice provided in an embodiment of the present invention, specifically:
1) when examining, arrange that 1 prediction drills every 10~15m on working face wall, bore diameter 42mm, deep 8~
10m, measurement drilling coal powder quantity of bore；
2) coal powder quantity of bore S<6kg/m continues back production, in back production, it is necessary to there are the prediction of>=3m drilling in advance away from；
3) when coal powder quantity of bore S >=6kg/m, then outburst danger it has been predicted as, it is necessary to take effective outburst prevention measures, spy before such as beating
Drilling, Vibration shot, static pressure water filling etc..
In step S203, crossdrift provided in an embodiment of the present invention exposes coal seam control measure, specifically includes:
(1) when roadway construction to away from seat earth minimum normal 10m apart from when, construct one group of at least five aperture
Drilling, coring is carried out in accordance with regulations, accurately controls coal seam position；
(2) measurement coal seam ton coal CO2Content, CO2Pressure, CO2The parameters such as the solid coefficient of diffusion initial speed and coal, sentence
Disconnected outburst hazard；
(3) driving starts exploration and digging and accurately grasps coal seam position to away from seat earth minimum normal 5m；
(4) driving once opens coal seam to away from seat earth minimum normal 2m.
In step S204, coal rock tunnel driving face passing fault provided in an embodiment of the present invention is specifically included:
(1) tomography that drop is more than coal seam thickness is encountered in front of Driving Face in Coal Tunnel, should be held by the measure of stone door punching coal
Row；
(2) when roadway construction to away from seat earth minimum normal 20m apart from when, pry into the drilling of tomography, hole depth requires to visit
To tomography and enter 10 meters of tomography only, judges outburst hazard；
(3) before being from drilled into after tomography to driving to tomography, in addition to continuing to execute measure effect and examining, team's per tour is tunneled
No less than 3 spy eyes will be beaten, visiting eye depth coal road cannot be less than 8 meters, and rock gangway cannot be less than 4 meters, and reserved not less than 2 meters
It is advanced away from.
Application principle of the invention is described in further detail combined with specific embodiments below；
Embodiment 1；
Coal (rock) provided in an embodiment of the present invention and CO2The regional control method of prominent accident；
1) protective layer is exploited
According to the geological conditions and prevention and treatment CO of the special thick half-edge coal seam of local area2Needs outstanding, using from top to bottom, trend
The coal-mining method of longwell, high-dipping horizontal slice (or inclined cuting layering) Sub-Level Caving, whole caving method processing goaf top plates.Upper
After segmentation exploitation, underlying seam obtains release, improves the gas permeability in coal seam, is CO2Dissipation and extraction create good condition.
It is measured for many years, after upper segmentation exploitation, the deep about 12.5m of effective unloading pressure protection.By digging it was verified that from upper
Sublevel drive is installed to back production and terminates, CO2Have 2/3rds in practical discharge rate from below in protected coal seam, explanation is opened
Superjacent is adopted to CO in underlying seam2It is fairly obvious to discharge release effect.
2) horizontal main entry, inter-road and CO are utilized2It is taken out in advance in extraction lane
As shown in figure 3, regional control CO2Exploitation protective layer and bottom plate extraction drilling arrangement.
As shown in figure 4, regional control CO2CO2Extraction lane.
1. roadway opening is arranged around protrusion-dispelling: the characteristics of according to exploitation, use it is point horizontal, stage by stage, along bearing
Arrange horizontal main entry, inter-road in the floor rock away from 20~30m of coal seam, the stage hangs down high 50m；In use horizontal main entry, in
Lane early period, mid-term was as air inlet and transportation roadway, and the later period, one lane was multi-purpose, shown in Fig. 3 as air return lane as extraction lane.
Before above-mentioned rock main entry goes into operation, geology and CO2Protrusion-dispelling department must provide tunnel gas (CO to construction sector2)
Geologic information；Under the premise of detecting by preceding inspecting hole without rift structure, not exposing coal seam, the technologies ginseng such as gas component is measured by sampling
Number, is analyzed and is verified, in no CO2Under the premise of outburst hazard, construction of rock gangway can be carried out.
When construction of rock gangway, every 30~50m, it is necessary to which 2 exploration holes of at least constructing drill to two layers of coal and measure CO2Stablize
Carbon isotope δ13C value, ton coal CO2Content, gas component, CO2Diffusion initial speed, coal seam solid coefficient, original CO2Pressure etc.
Various technical parameters analyze and determine outburst hazard.Regional effect inspection is performed simultaneously three discriminant criterions: CO2Content < 5m3/
T, CO2Pressure P < 0.63MPa, CO2Pre- pumping rate >=40%.
2. arranging that drilling is pre- in construction tunnel to take out: in each rocks main entry of construction, every 50m arranges that 1 extraction is bored
, it constructs 1 group, 1 group of extraction by design and construction extraction drilling in time after each drill site construction；Drilling arrangement is spatially handed over
Fork, horizontal plane face are fan-shaped layer-through drilling arrangement, and drill hole density is determined according to effective drainage radius 12m；Aperture usesUsing cement and numb sealing of hole, each drilling holes at the drilling yard and main line are connect using intersecting branch pipe, and drill site installation air water divides
From device or outlet gate.Meanwhile a point horizontal subsystem installation digital gas flowmeter is measured, and is acquired gas sample weekly and is taken out
Put concentration analysis.
3. utilizing CO2Extraction lane and mobile pumping are put: according to the firsthand information obtained in outburst prevention work, dividing inhomogeneity
The outburst danger region and guard key region of type, construct dedicated CO2Drainage roadway arranges intensive drilling, after having constructed, in
Closed pre-buried releasing pipe is done at entrance to a lane and discharge tube carries out extraction, as shown in figure 4, method gas drainage results are good, no extraction pipeline ponding, leakage
The problems such as gas.When extraction region is relatively independent, flexible mobile pumping can be used and put.
Embodiment 2；
Coal (rock) provided in an embodiment of the present invention and CO2The local anti-burst method of prominent accident；
Local outburst hazard " quaternity " control measure includes that stone door punching coal, the outburst hazard of getting working face are pre-
Survey, pre- Anti-protrusion measure, validity check and safety prevention measure.
As shown in figure 5, local control CO2Driving face measure effect examine schematic diagram.
As shown in fig. 6, local control CO2Stope predict schematic diagram.
As shown in fig. 7, local control CO2Stone door punching coal, Driving Face in Coal Tunnel effect inspection hole arrangement schematic diagram.
1) Driving Face in Coal Tunnel preceding prospecting bit hole prediction in advance.
1. before coal road construction, first arranging 4~9 apertures in working faceThe advanced preceding spy of 30~75m of hole depth
Prediction drilling；Drill whole hole control range: away from 2~4m outside lane side, 2~3 ° of inclined hole inclination angle on top controls angular bit hole on two for two sides
Whole pitch-row or so encircles outer 2~4m；Sampling analysis gas component, and measure a ton coal CO2Content, coal seam solid coefficient and coal it is broken
Bad type, whether there is or not outburst dangers come comprehensive judgement coal seam for the protrusion dynamic phenomenon according to the parameter of measurement and during drilling；Often
Mine protrusion-dispelling special meeting must be held after secondary prediction drilling construction, confirmation drilling control range is interior without CO2Abnormal Methane Emission, CO2
Content < 5m3/ t, and retain enough prominent 5m predictions and carry out tunneling construction away under conditions of in advance.There is outburst danger through judgement
Property when, take increase the discharge of drilling nature, drill site advance borehole alternating extraction and medium-length hole standing by meet head on extraction or lane
Release etc. carries out extinction.
2. measuring K using method of drilling index in tunneling process1It is worth (or △ h value) and coal powder quantity of bore S carries out validity check, that is, applies
Work is not less than 3 aperturesThe validity check hole of 8~10m of hole depth, measurement drilling coal powder quantity of bore, is further verified and pre-
Working face outburst danger is surveyed, K is worked as1Value < 0.5, when coal powder quantity of bore S≤6kg/m, it is believed that outburst prevention measures effectively continue to tunnel.But it is necessary
It takes following safety prevention measure: constructing twice isolation protrusion-dispelling air door in air inlet；Big gun is put outside protrusion-dispelling air door at a distance when digging
Big gun can carry out operation after blowing out rear 30min confirmation normally；Sole duty watt inspection person's running check gas (CO is set2)；It is set by regulation
Set compressed air self-help, driving distance be more than 500m tunnel in must be provided with temporary shelter chamber；Independent ventilating system is established, is prevented
Prominent working face return air is introduced directly into total return air；Protrusion-dispelling technical staff checks the implementation of conditions of live measures daily.Such as Fig. 5 institute
Show.
2) coal face projection prevention measure.
During working face extraction, along advance of the face direction, every 10~50m does validity check twice according to the actual situation；Inspection
When testing, 1 prediction drilling, bore diameter 42mm, deep 8~10m, measurement drilling are arranged every 10~15m on working face wall
Coal powder quantity of bore continues back production such as coal powder quantity of bore S<6kg/m, in back production, it is necessary to there are the prediction of>=3m drilling in advance away from.It bores
When bits amount S >=6kg/m, then outburst danger has been predicted as, it is necessary to take effective outburst prevention measures, prospecting bit hole, vibration are put before such as beating
Big gun, static pressure water filling etc..As shown in Figure 6.
3) crossdrift exposes coal seam control measure
Before crossdrift goes into operation, production technology portion must provide gas (CO to construction team2) the technologies money such as geology specification
Material controls coal seam position with preceding prospecting bit hole, measures CO2Content.When roadway construction is to away from seat earth minimum normal 10m distance
When, one group of at least five aperture of constructingDrilling, it is entirely thick that hole depth penetrates coal seam as far as possible, and is strictly carried out in accordance with regulations
Coring, it is necessary to coal seam position is accurately controlled, prevents and accidentally wears tomography coal seam, measurement coal seam ton coal CO2Content, CO2Pressure, CO2Release
The parameters such as the solid coefficient of initial velocity and coal when having outburst danger through judgement, take the measures such as drilling-draining and discharge, extinction
Implementation result is examined again afterwards；Driving starts exploration and digging and accurately grasps coal seam position, arrange to away from seat earth minimum normal 5m
The units such as technology, protrusion-dispelling and security department leader, which reinforces scene, joins a regular shift or class；Driving is once opened to away from seat earth minimum normal 2m
Coal seam, as shown in Figure 7.
4) coal rock tunnel driving face passing fault
The tomography that drop is more than coal seam thickness is encountered in front of Driving Face in Coal Tunnel, should be executed by the measure of stone door punching coal.
When roadway construction to away from seat earth minimum normal 20m apart from when, pry into the drilling of tomography, hole depth requires to visit to tomography and enter
10 meters of tomography only, judge outburst hazard.
Before being from drilled into after tomography to driving to tomography, in addition to continuing to execute measure effect and examining, driving team's per tour is all
No less than 3 spy eyes are beaten, visiting eye depth coal road cannot be less than 8 meters, and rock gangway cannot be less than 4 meters, and reserve not less than 2 meters
In advance away from.
The conclusion of embodiment 1 and embodiment 2:
The mining area Yao Jie is in digging production, and encircled area protrusion-dispelling is using exploitation protective layer coal-mining method from top to bottom；Tunnel cloth
It sets along the horizontal main entry of bearing arrangement floor rock, inter-road, carries out before stage advance drainge, pick pumping, inhaling as tunneling, side in advance
It adopts side and takes out and utilize CO2Extraction lane is mobile to pump flexible extraction.
In the local outburst prevention measures of digging production, in addition to coal roadway tunneling and the daily protrusion-dispelling of coal working face, around blowing out
It is CO with roof fall2It is anti-to carry out stringent protrusion-dispelling to the geologic anomalies such as stone door punching coal, passing fault region for the direct inducement of prominent accident
Control measure.
Embodiment 3；
The mining area Yao Jie CO2The analysis of causes outstanding
According to the coalfield Yao Jie envelope hiding largely with the CO of outburst danger2This concrete condition, the mining area Yao Jie successively can be in
The expert and scholar of the units such as the Lanzhou Ke Yuan Institute of Geology, China Mining University, Xi'an Technology University expand research, analysis
Cause CO outstanding2Crack cause inquires into kiln street coal field geology brush structure and CO2Migration, envelope hiding and relationship outstanding.
As shown in figure 8, kiln street coalfield structure sketch map provided in an embodiment of the present invention.
As shown in figure 9, composite columnar section provided in an embodiment of the present invention.
The 1 specific geological conditions in the mining area Yao Jie
The coalfield Yao Jie is located at the western end of the people and basin central uplift belt, domestic in Lanzhou Honggu District.During the people and basin be
What Qilian mountains mrine geomorphy was formed in print branch, the Yanshan Mountain, Himalaya three are transformed at basin cycle and three phases；In Late Indosinian structure
It makes in movement, the people and basin have started the depression in basin, and receive deposition of lower Jurassic Period in western end local area, form this
One Mesozoic Era Jurassic Coalfield.
In north-northwest to extension, the construction in coalfield has the characteristics that Polyphase activity and follows in the coal basin moulded coal field.
The east side in coalfield is Fl9Fracture belt, the fracture are one and develop on the basis of preceding Mesozoic Era fossil fracturte, influence earth's crust depth
Spend larger and Polyphase activity and the east boundary in the fracture of the plyability of property complexity and mining area.Fl9In the coalfield of fracture belt west side
Have a series of east northeasts to anticline and synclinal structure, the arc-shaped spread of axis it is a series of criss-cross disconnected together with therebetween
It splits construction and collectively constitutes a west to the south and let go, to the convergent brush structure of east northeast, see Fig. 8.
What kiln street group's coal measure strata underlied is Proterozoic Metamorphic Rockss system (Paleozoic Era and Mesozoic Era Triassic Sedimentary missing), this
Series of rocks are the low rotten clastic rock of huge thickness, carbonatite and mafic-intermediate volcanic rocks composition, the company of the set stratum other than the region of field with "nine squares"
The street Tang Xiajiyao one is enjoyed with extensive exposure in city.In addition, coal-bearing series are made of coal seam and its roof and floor in the coalfield Yao Jie
(Fig. 9), Seam Roof And Floor rock press from both sides conglomerate, siderite, oil sands, multilayer oil shale based on sandstone, mud stone；Oil shale is
Rich ore layer, oil content are high, have combustibility, wherein four layers of oil are only had 1~5m away from two layers of coal, easily by destructive distillation and burning.Coalfield
5 layers of coal are included, minable coal seam has 2 layers, i.e. 0~11.79m of coal a layer thickness, and average coal thickness 4.14m can locally be adopted, two layers of coal are
Main mining coal seam, 0~110.9m of thickness, average coal thickness 24.1m, inclination angle is most of at 60 °, belongs to severe inclined thick coal seam；Coal is big
Part is jet coal, belongs to and is easy coal seam prone to spontaneous combustion, and spontaneous combustion period is 3~6 months, and coal dust has explosion hazard, is belonged to low
Biogas, CO2Prominent coalfield.
2 coalfield Yao Jie CO2Genetic analysis
CO in coalfield2Generation can be divided into inorganic and organic origin two major classes, oxidation operation thermal cracking heat drop
Solve the CO generated2Belong to organic origin；And the slow source CO that predominantly the slow degasification of inorganic is formed2Or crustal rock chemistry
Reaction is thermally decomposed etc. the shell source CO of generations with carbonate rock2.Now using common Stable Carbon helium isotope side both at home and abroad
Method carries out CO2The origin cause of formation sentences knowledge, and according to coal field geology condition to CO2It is researched and analysed in source.
1) CO is carried out using gas sample2Source analysis
Utilize CO in gas composition2Percentage composition, δ13It is different next that C value, which identifies organic and anorganogene basic principle,
The carbonaceous in source has different δ13C value, the CO that inorganic generates2It is likely to form the gas reservoir of high concentration, high-content, Li Zhao
Emerging, Tao Mingxin etc. is inorganic with organic origin CO in system research gas sample in the 1st phase in 1992 " deposition journal "2Volume hundred
Score and δ13C value division limits.Accordingly, each mine in 2011 street Nian Yao coalfield of document [15] China Mining University acquires gas sample,
The CO of measurement2Content major part measuring point is greater than 60%, CO2δ13C value is+1.12 × 10-3~-1.11 × 10-3, it is all larger than -8
×10-3；In three pit coal rocks and CO2Projecting point samples the δ measured13C value is -4 × 10-3, projecting point CO2High concentration high-content, therefore
Determine the coalfield Yao Jie CO2Source belongs to inorganic.
Due to curtain source in gas sample and shell source CO2δ13C value has overlapping region, using δ13C value, which can not be sentenced, knows curtain pressure vessel source
CO2Severity of mixing up, so at present frequently in gas sample3He with4He atomicity ratio is as judgement shell source and curtain source CO2Weight
It will foundation.This is because3He is and the slow related original origin cause of formation helium in ground；4He is the related radiation of a decay with uranium, thorium in the earth's crust
Property helium, passes through analysis and research3He with4He atomicity ratio, can determine that the types and sources of helium, to know from slow source and shell
The severity of mixing up of source gas.
Specifically, commonly using R/Ra indicates helium isotope distribution characteristics in gas sample:
Wherein, Ra indicates the isotopic ratio of helium in atmosphere, and value is 1.4 × 10-6, R indicate gas sample in separate sources helium
Isotopic ratio；As R/Ra > 1, indicate that curtain source helium is mixed into gas sample, as R/Ra < 0.1, it is believed that helium base in gas sample
This comes from shell source.Document [15] is in kiln Jie Gekuang and three mines, 5.24 coal and CO2The R/Ra value that aspis sampling measures is substantially all
It less than 0.1, therefore is typical shell source gas feature.
2)CO2The Geological Cause Analysis of generation
Through a large amount of coalfield Yao Jie and peripheral geologic survey, the analysis of magnetic prospecting data, and according to Lanzhou geological research
Fission-track dating that the secondary calcites arteries and veins in coal measure strata is carried out and the argon isotope to prominent area's gas age
Build-up effect analysis and research, obtain Local enrichment CO in the coalfield coal seam of kiln discharge street2Carry out source procedure: in late Cretaceous period Mo, the Tertiary Period
Before, tectonic movement has occurred in coalfield, and strong squeeze makes coal measure strata generate fold fracture with shear action, and ultrabasic magma exists
One band of river deer ditch is along F19Fracture belt intrusion；Under the action of intrusive rock heat, griotte decomposed in the substrate of coalfield is being broken
The north and south both ends of band, CO2Gas makes ultrabasic rock and country rock that carbonation occur, and generates a large amount of CO2。
In addition, the heated fluid stream of crust deep part encounters the oil content of coal measure strata along block uplift in above-mentioned tectonic movement
The coal seam of high flammable oil shale and easily oxidation and spontaneous combustion brings it about pyrolysis, and is stepped up its temperature and pressure,
The physical-chemical reaction that a series of complex such as water decomposition, oxidation of coal occur, generates a large amount of CO2Gas, and make coal seam and oil shale
And its top covering rockmass barbecue melting forms burnt rock.Burnt rock is mainly along F in coalfield19Fracture belt distribution, area about 1.6km2, most
Thickness reaches 260m, cranny development in rock, and porosity average 18.01% reaches as high as 30%, this and CO2Multiple projecting point is in F19
Fracture belt nearby matches.
Thus determine the CO in the coalfield Yao Jie2The reason of generation is the power hot-fluid due to tectonic movement and its initiation, CO2
There are two types of approach in source: first is that ultrabasic magma invades in the griotte in base, thermally decomposing carbonate and generates a large amount of
CO2；Second is that coal and the heated physical-chemical reaction that complexity occurs of oil shale form burnt rock, CO is generated during burning and becoming2。
CO in 3 coal measure stratas2Migration, envelope hiding and prominent reason
The CO of so above-mentioned generation2It is how to assemble envelope hiding, by what channel to projecting point migration supply when prominent
? the tectonic type in the coalfield Yao Jie is brush structure, the appressed fold of the series pressure property turned round and fracture, makes attitude of coal steepening,
Construction complicates, and coal seam is loose, and crack rate is high, surface area increases, and therefore, just easily promotes CO at these positions2Migration and poly-
Collection envelope hiding.In this way deep under ground carbonate decomposition generate and the CO that generates in burnt rock forming process2, pass through F19Major fault and
Fold rift structure in coalfield penetrates into coal seam, and part has replaced the methane in coal seam and generated competitive Adsorption；There are also one
Divide the CO of free state2, since roof (be distributed and stablize for fine sand, middle sandstone and oil shale) fine and close poor air permeability is with good
Good gas storage condition and can not dissipate and be hidden by envelope.From the CO having occurred and that2It sprays and also demonstrates area with the specific location of projecting point
The position and CO that domain construction stress is concentrated2What the special position gushed out was consistent with；From borehole data and digging outburst prevention work
The data being collected into, with leaving F19The increase CO of tomography distance2Mixed gas concentration, CO2Content constantly reduces, this and CO2It assigns
It deposits and migration rule is consistent.
Since these regional structure person's movements and expression development tectonic stress is concentrated, when mining work activities destroy CO2The balance strip of aggregation
A large amount of CO when part, under high pressure conditions2Short time occurs Fast-Balance to low-pressure area and moves, and energy discharges suddenly, that is, produces
It is raw to protrude；It seals simultaneously and ensconces F19CO in tomography and burnt rock2Continually pass through fold again and be broken to migrate to projecting point and mends
It gives.As it can be seen that CO2Protrusion must have three conditions: a large amount of sufficient CO2Gas source, good sealing condition, special crustal stress
Condition.
As a result:
According to the specific geological conditions in the coalfield Yao Jie, with CO in gas sample2Content, stable carbon isotope δ13C value, rare gas
Body3He with4The ratio of He atomicity, analysis determine CO2From shell source and burnt rock；To the CO in coal measure strata2Migration, envelope
Hiding and prominent reason are analyzed, and obtain CO2Condition outstanding.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of coal and CO2The control method of prominent accident, which is characterized in that the coal and CO2The prevention and treatment side of prominent accident
Method includes regional control method and local anti-burst method；
Regional control method, including exploitation protective layer, utilize horizontal main entry, inter-road and CO2It is taken out in advance in extraction lane；
Local anti-burst method, including the advanced prospecting bit hole prediction of Driving Face in Coal Tunnel, coal face projection prevention measure, crossdrift are exposed
Coal seam control measure and Driving Face in Coal Tunnel passing fault outburst prevention measures.
2. coal as described in claim 1 and CO2The control method of prominent accident, which is characterized in that the coal and CO2Prominent thing
Therefore regional control method specifically includes the following steps:
Step 1: exploitation protective layer, using from top to bottom, move towards longwell, high-dipping horizontal slice or inclined cuting layering Sub-Level Caving, complete
The coal-mining method of portion's caving method processing goaf top plate；
Step 2: horizontal main entry, inter-road and CO are utilized2It is taken out in advance in extraction lane.
3. coal as claimed in claim 2 and CO2The control method of prominent accident, which is characterized in that in the step 2, utilize
Horizontal main entry, inter-road and CO2Extraction lane is taken out in advance, is specifically included:
(1) roadway opening is arranged around protrusion-dispelling；
(2) it arranges that drilling is pre- in construction tunnel to take out；
(3) CO is utilized2Extraction lane and mobile pumping are put.
4. coal as claimed in claim 2 and CO2The control method of prominent accident, which is characterized in that the tunnel in the step 2
Development layout surrounds protrusion-dispelling, specifically:
1) according to exploitation the characteristics of, use it is point horizontal, stage by stage, along bearing in the floor rock away from 20~30m of coal seam
The horizontal main entry of middle arrangement, inter-road, stage hang down high 50m；
2) horizontal main entry, inter-road early period, mid-term was as air inlet and transportation roadway, and the later period is as return air as extraction lane in use
Lane, a lane are multi-purpose.
5. coal as claimed in claim 2 and CO2The control method of prominent accident, which is characterized in that apply on the side in the step 2
The arrangement drilling of work tunnel side is pre- to take out, specifically:
1) every 50m arranges 1 extraction drill site, constructs 1 group by design and construction extraction drilling in time after each drill site construction,
1 group of extraction；
2) drilling arrangement is spatially intersected, and horizontal plane face is fan-shaped layer-through drilling arrangement, and drill hole density is taken out according to effective
Radius 12m is put to determine；
3) aperture usesUsing cement and numb sealing of hole, each drilling holes at the drilling yard intersects branch pipe with main line use and connect,
Drill site installs moisture trap or outlet gate；
4) divide horizontal subsystem installation digital gas flowmeter to be measured, acquire gas sample weekly and carry out extraction concentration analysis.
6. coal as claimed in claim 2 and CO2The control method of prominent accident, which is characterized in that the utilization in the step 2
CO2Extraction lane and mobile pumping are put, specifically:
Different types of outburst danger region and guard key region are divided, construct dedicated CO2Drainage roadway arranges intensive bore
Hole after having constructed, does closed pre-buried releasing pipe in entrance to a lane and discharge tube carries out extraction；When extraction region is relatively independent, can adopt
It is put with flexible mobile pumping.
7. coal as described in claim 1 and CO2The control method of prominent accident, which is characterized in that the coal and CO2Prominent thing
Therefore local anti-burst method, specifically include:
Step 1: Driving Face in Coal Tunnel preceding prospecting bit hole prediction in advance；
Step 2: coal face projection prevention measure, along advance of the face direction, every 10~50m does effect twice according to the actual situation
It examines；
Step 3: crossdrift exposes coal seam control measure, before crossdrift goes into operation, controls coal seam position with preceding prospecting bit hole, measures CO2
Content；
Step 4: coal rock tunnel driving face passing fault.
8. coal as claimed in claim 7 and CO2The control method of prominent accident, which is characterized in that in the step 1, coal road
Driving face preceding prospecting bit hole prediction in advance, specifically:
(1) before coal road construction, 4~9 apertures first are arranged in working faceAdvanced preceding visit of 30~75m of hole depth is predicted
Drilling；Sampling analysis gas component, and measure a ton coal CO2The Failure type of content, coal seam solid coefficient and coal, according to measurement
Parameter and the protrusion dynamic phenomenon during drilling come comprehensive judgement coal seam whether there is or not outburst dangers；In confirmation drilling control range
Without CO2Abnormal Methane Emission, CO2Content < 5m3/ t, and retain enough prominent 5m predictions and carry out tunneling construction away under conditions of in advance；
(2) K is measured using method of drilling index in tunneling process1Value or △ h value and coal powder quantity of bore S carry out validity check.
9. coal as claimed in claim 7 and CO2The control method of prominent accident, which is characterized in that the excavation in the step 1
In the process, the safety prevention measure of use are as follows:
1) twice isolation protrusion-dispelling air door is constructed in air inlet；
2) it is blown out at a distance outside protrusion-dispelling air door when big gun is dug, operation can be carried out after blowing out rear 30min confirmation normally；
3) full-time watt inspection person's running check gas is set；
4) by regulation be arranged compressed air self-help, driving distance be more than 500m tunnel in must be provided with temporary shelter chamber；
5) independent ventilating system is established, outburst prevention work face return air is introduced directly into total return air；
6) protrusion-dispelling technical staff checks the implementation of conditions of live measures daily.
10. coal as claimed in claim 7 and CO2The control method of prominent accident, which is characterized in that two in the step 2
Secondary validity check, specifically:
1) when examining, arrange that 1 prediction drills every 10~15m on working face wall, bore diameter 42mm, deep 8~10m,
Measurement drilling coal powder quantity of bore；
2) coal powder quantity of bore S<6kg/m continues back production, in back production, it is necessary to there are the prediction of>=3m drilling in advance away from；
3) when coal powder quantity of bore S >=6kg/m, then outburst danger it has been predicted as, it is necessary to take effective outburst prevention measures, prospecting bit before such as beating
Hole, Vibration shot, static pressure water filling；
In the step 3, crossdrift exposes coal seam control measure, specifically includes:
(1) when roadway construction to away from seat earth minimum normal 10m apart from when, construct one group of at least five apertureBrill
Coring is carried out in accordance with regulations in hole, accurately controls coal seam position；
(2) measurement coal seam ton coal CO2Content, CO2Pressure, CO2The parameters such as the solid coefficient of diffusion initial speed and coal, judgement are prominent
Risk out；
(3) driving starts exploration and digging and accurately grasps coal seam position to away from seat earth minimum normal 5m；
(4) driving once opens coal seam to away from seat earth minimum normal 2m；
In the step 4, coal rock tunnel driving face passing fault is specifically included:
(1) tomography that drop is more than coal seam thickness is encountered in front of Driving Face in Coal Tunnel, should be executed by the measure of stone door punching coal；
(2) when roadway construction to away from seat earth minimum normal 20m apart from when, pry into the drilling of tomography, hole depth requires to visit to disconnected
Layer simultaneously enters 10 meters of tomography only, judges outburst hazard；
(3) before being from drilled into after tomography to driving to tomography, in addition to continuing to execute measure effect and examining, driving team's per tour will
No less than 3 spy eyes are beaten, visiting eye depth coal road cannot be less than 8 meters, and rock gangway cannot be less than 4 meters, and reserved super not less than 2 meters
It is preceding away from.
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| CN113153416A (en) * | 2021-04-08 | 2021-07-23 | 重庆工程职业技术学院 | Method for eliminating protrusion in large area by utilizing horizontal main lane and directional ultra-long drill hole |
| CN115099720A (en) * | 2022-08-24 | 2022-09-23 | 山西凯嘉能源集团有限公司 | Tracing method for coal measure stratum surrounding rock gas outburst |
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| 孙建设: "《防治CO2突出技术研究》", 《煤炭科技》 * |
| 岳才华等: "《综合防突措施在窑街一号井的应用》", 《甘肃科技》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965964A (en) * | 2019-12-16 | 2020-04-07 | 临沂矿业集团菏泽煤电有限公司 | Gas extraction method for ultra-thick coal seam |
| CN113153416A (en) * | 2021-04-08 | 2021-07-23 | 重庆工程职业技术学院 | Method for eliminating protrusion in large area by utilizing horizontal main lane and directional ultra-long drill hole |
| CN113153416B (en) * | 2021-04-08 | 2023-02-03 | 重庆工程职业技术学院 | Method for eliminating protrusion in large area by utilizing horizontal main lane and directional ultra-long drill hole |
| CN115099720A (en) * | 2022-08-24 | 2022-09-23 | 山西凯嘉能源集团有限公司 | Tracing method for coal measure stratum surrounding rock gas outburst |
| CN115099720B (en) * | 2022-08-24 | 2022-12-09 | 山西凯嘉能源集团有限公司 | Tracing method for coal measure stratum surrounding rock gas outburst |
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