CN102061919A - Co-mining tunneling method of seam roadway gas - Google Patents
Co-mining tunneling method of seam roadway gas Download PDFInfo
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- CN102061919A CN102061919A CN 200910234710 CN200910234710A CN102061919A CN 102061919 A CN102061919 A CN 102061919A CN 200910234710 CN200910234710 CN 200910234710 CN 200910234710 A CN200910234710 A CN 200910234710A CN 102061919 A CN102061919 A CN 102061919A
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- gas
- roadway
- heading
- coal
- sealed door
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005065 mining Methods 0.000 title claims abstract 7
- 230000005641 tunneling Effects 0.000 title abstract 4
- 239000007789 gas Substances 0.000 claims abstract description 73
- 238000004378 air conditioning Methods 0.000 claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 239000003034 coal gas Substances 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 abstract description 17
- 230000006378 damage Effects 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention discloses a co-mining tunneling method of seam roadway gas. The port of a roadway is sealed to form a sealed space, therefore air outside the roadway can not enter the space, so that the concentration of the gas in the roadway is above 20%, the concentration of the oxygen in the roadway is lower than 12%, and gas loses explosion capability. A drawing pipe is connected to release high-concentration gas released in a working space. In order to prevent high pressure from forming when coal and gas extrude in the roadway, a circular arc-shaped pressure relief roadway is dug on the opening end of the roadway, and high-pressure gas generated by extrusion can be removed. An air conditioning system is arranged in the roadway to guarantee proper environment in the roadway, and workers work in the sealed space under the condition of prepared safety protection. By utilizing the roadway tunneling method, the problem of gas explosion is fundamentally solved, fire hazard danger is also eliminated, and the damage to a human body caused by respirable dust is eliminated; and meanwhile, because the roadway does not have explosion danger, so that the co-mining tunneling method provided by the invention has no anti-explosion requirement on equipment, and has a good popularization value.
Description
Technical field
The present invention relates to a kind of heading driving method, especially compose and deposit evenly, the coal seam that the sealing of no major fault is good, in heading, form a space that is full of methane gas, make oxygen concentration be lower than 12%, gas density is higher than 20% and lose under the situation of explosion danger, carry out security protection after, enter and implement the driving method that heading coal gas is adopted altogether in the tunnel.
Background technology
When the driving heading, cause gas exceeding limit easily, in the outburst danger coal seam, implement the tunnelling operation, cause coal and gas outstanding easily, outstanding a large amount of gas cause the dead group of group to hinder serious accident in case blast will bring grievous injury to mine.At present domestic, the dead group of group hinders accident and occurs in the gas explosion accident basically.Traditional control gas explosion technology, though can play certain preventive and therapeutic effect, but owing to gushing out continuously and the ventilation unstability of gas, sporadic in addition gas ejection or coal and gas are outstanding, all make gas density be in probably within the explosion limit, after running into naked light etc. and gas explosion takes place.Present control gas explosion method does not fundamentally stop gas explosion.
The coal-bed gas reserves of China reach 35,000,000,000,000 m
3But utilization rate is but very low always, and most of gas is too low owing to concentration, and directly is discharged in the atmosphere, and gas is a kind of greenhouse gases, directly enters atmosphere will cause climate warming, destroys ecological environment.Simultaneously, gas also is a kind of clean energy resource, and its calorific value is 3 times of hydrogen approximately, and China is an energy scarcity type country, and the utilization rate that how to improve gas is the thing of the task of top priority, gas make full use of a growth point that can become national economy.
Summary of the invention
The objective of the invention is problem at the prior art existence, provide a kind of heading coal gas to be total to digging and advance method, port by airtight heading, make and be full of high concentration gas gas in the tunnel, lose at gas under the situation of explosion hazard, directly extraction is used, and implements driving simultaneously in the tunnel of high concentration gas gas.
Heading coal gas of the present invention digging altogether advances method:
A, after bord-up driving is finished, in the coal seam, tunnel haulage drift and heading successively from bord-up;
B, in heading interior construction one air conditioning cavern, and in the air conditioning cavern, install booster, ventilating duct 15, air-conditioning and cleaner successively;
C, install the twice sealed door at interval in the haulage drift entrance;
D, install the gas drainage under suction pipeline that leads to heading in haulage drift inside, the gas drainage under suction pipeline passes the twice sealed door, implements gas drainage under suction, makes the air pressure in the confined space be about an atmospheric pressure;
E, the indoor nitrogen that charges into of the notes nitrogen between the twice sealed door, nitrogen gas pressure is higher than ambient pressure 5～200Pa;
F, to the inner nitrogen injection of heading, and by gas drainage under suction pipeline extraction gas wherein, oxygen concentration is lower than 12% up to inside, tunnel;
G, unlatching ventilation fan, air-conditioning and cleaner are made circulated air, to reduce temperature and the dust concentration in the enclosure space;
H, workman are carrying out under the condition of security protection, enter and implement digging operation in the enclosure space;
I, monitor gas and oxygen concentration in the enclosure space in the exploitation process in real time, guaranteeing that gas density is higher than 20%, oxygen concentration is lower than and realizes under 12% the condition that coal gas adopts altogether.
The supporting capacity of described sealed door is not less than 1MPa.
When there is outburst danger in definite coal seam, after the bord-up driving is finished, tunnel a return aircourse again, from the arc release tunnel that the return aircourse driving is connected with heading; Safe sealed door is set in the release tunnel, guarantees not have methane gas loss in the enclosure space; Safe sealed door in the release tunnel is together or twice, when twice safety sealed door, between the indoor nitrogen that charges into of notes nitrogen, make nitrogen gas pressure be higher than ambient pressure 5～200Pa; The supporting capacity of described safe sealed door is 0.05～0.2MPa; In the return aircourse, the exploiting field sealed door is set with intersection inlet side, arc release tunnel.
Beneficial effect: by airtight heading, in heading, form an enclosure space, make gas density lose explosion danger, can effectively play the effect that mine prevents gas explosion, avoid because the malignant event that the dead group of the group that gas explosion causes hinders takes place considerably beyond 20%.Because the rising of the inner gas density of enclosure space makes oxygen concentration reduce, and can suppress spontaneous combustionof coal, suppresses the generation of mine fire, avoids producing toxic and harmful because of mine fire, and the people is caused harm.The various material corrosions that use in the mine slow down simultaneously, make prolong the application life of various materials.Because it is explosion-proof that gas not within the explosion ratio scope, makes that the interior electric equipment of enclosure space need not, all electric equipments that ground can be used can both use within airtight scope.The constructor is carrying out under the condition of security protection, enters and implements operation in the tunnel.The direct extraction of methane of the inner high concentration in tunnel can be used, and avoids discharge of methane and the destruction of causing energy loss and ecological environment.
Description of drawings
Fig. 1 outburst danger coal seam coal gas is adopted the tunnelling arrangement diagram altogether
The non-outburst danger of Fig. 2 coal seam coal gas is adopted the tunnelling arrangement diagram altogether
Fig. 3 air conditioning cavern 11 partial enlarged drawings
Among the figure: the 1-sealed door; 2-safety sealed door; 3-annotates the nitrogen chamber; 4-exploiting field sealed door; The 5-bord-up; The special-purpose return airway of 6-; The 7-heading; The 8-coal seam; The 9-haulage drift; 10-release tunnel; 11-air conditioning cavern; The 12-ventilation fan; The 13-air-conditioning; The 14-cleaner; The 15-ventilating duct.
The specific embodiment
Embodiment one, Fig. 1 Fig. 3 Fig. 4 are shown in Figure 5, when the coal seam when outburst hazard is identified no outburst danger, it is as follows that method step is advanced in the common digging of heading coal gas:
A, shown in Figure 1 after bord-up 5 drivings are finished, tunnels heading 7 from bord-up 5 in coal seam 8;
B, in heading 7 interior constructions one air conditioning cavern 11, and in air conditioning cavern 11, install booster 12, ventilating duct 15, air-conditioning 13 and cleaner 14 successively;
C, install can pass through mine car and pedestrian's sealed door 1 of twice at interval in heading 7 entrance, make the bank form a confined space, the supporting capacity of twice sealed door 1 requires to be not less than 1MPa.
D, at heading 7 laid inside gas drainage under suction pipelines, the gas drainage under suction pipeline passes twice sealed door 1, the inner gas of extraction tunnel 7 enclosure spaces, and the air pressure of controlling in the confined space by the speed that control draws out methane is about an atmospheric pressure;
Charge into nitrogen in e, the notes nitrogen chamber 3 between twice sealed door 1, nitrogen gas pressure is higher than ambient pressure 5～200Pa, and methane gas enters and annotates nitrogen chamber 3 when avoiding current mine car or pedestrian.
F, the 7 driving initial stages of heading need be to its inner nitrogen injection, and by gas drainage under suction pipeline extraction gas wherein, displacement heading 7 inner airs are lower than at 12% o'clock up to heading 7 inner oxygen concentrations and stop to annotate nitrogen, and this moment, inside, tunnel lost explosion hazard;
G, open ventilation fan 12, air-conditioning 13 and cleaner 14, distinguished and admirablely deliver to the digging laneway inner termination along ventilating duct 15 after treatment, and return, form circulated air, to reduce temperature and the dust concentration in the enclosure space from the tunnel.When the temperature in the enclosure space is not more than 30 ℃, air-conditioning 13 can be do not opened, when visibility can not opened cleaner 14 when 50m is above, when air-conditioning 13 and cleaner 14 are not opened, ventilation fan 12 can be do not opened.
H, workman enter under carrying out the condition of security protection and implement operation in the enclosure space;
I, monitor gas and oxygen concentration in the enclosure space in the exploitation process in real time, guaranteeing that gas density is higher than 20%, oxygen concentration is lower than and realizes under 12% the condition that coal gas adopts altogether.
Embodiment two, Fig. 2 Fig. 3 Fig. 4 are shown in Figure 5, when identify when outburst danger is arranged through outburst hazard in the coal seam, heading coal gas altogether digging to advance method step as follows:
A, after bord-up 5 driving is finished, tunnel a return aircourse 6 again, in coal seam 8, tunnel haulage drift 9 and heading 7 successively from bord-up 5; The 6 arc release tunnels 10 that are connected with heading 7 of driving from the return aircourse are to reduce the distinguished and admirable resistance that flows to arc release tunnel 10 from section tailgate 14 or section haulage way 7.Do not influencing under the situation of ventilating and normally using, can be in the return aircourse 6 inside, and the weather side in release tunnel 10 and return aircourse 6 intersections is installed exploiting field sealed door 4, prevent from the distinguished and admirable reverse in whole exploiting field that outstanding gases at high pressure may cause is taking place, exploiting field sealed door 4 can stay to be established air regulator and is used to regulate circulation of air.
B, in heading 7 interior constructions one air conditioning cavern 11, and in air conditioning cavern 11, install booster 12, ventilating duct 15, air-conditioning 13 and cleaner 14 successively;
C, install at interval can pass through mine car and pedestrian's sealed door 1 of twice in haulage drift 9, make the bank form a confined space, the supporting capacity requirement of twice sealed door 1 is not less than 1MPa.Be provided with in release tunnel 10 one or twice safety sealed door 2, lithology is more stable around the tunnel, need only just can stop gas leakage by together safe sealed door 2, then can adopt safe sealed door 2 together; Lithology instability around the tunnel need be installed twice safety sealed door 2, and the supporting capacity of safe sealed door 2 is 0.05～0.2MPa, guarantees when being impacted that safety sealed door 2 destroys and sealed door 1 can not destroy.
D, lay the gas drainage under suction pipeline afterwards, the gas drainage under suction pipeline passes twice sealed door 1, the inner gas of extraction tunnel 7 enclosure spaces, and the air pressure that the speed that draws out methane by control or negative pressure are controlled in the confined space is about an atmospheric pressure;
Charge into nitrogen in e, the notes nitrogen chamber 3 between twice sealed door 1, make nitrogen gas pressure be higher than ambient pressure 5～200Pa, methane gas enters and annotates nitrogen chamber 3 when avoiding current mine car or pedestrian, and then to bord-up 5 internal leakage; When twice safety sealed door 2 is installed in 10 inside, release tunnel, also need nitrogen injection in the notes nitrogen chamber 3 between twice safety sealed door 2, make nitrogen pressure be higher than external atmosphere pressure 5～200Pa.
F, need be at the 7 driving initial stages of heading to its inner nitrogen injection, and by gas drainage under suction pipeline extraction gas wherein, displacement heading 7 internal gas are lower than at 12% o'clock up to heading 7 inner oxygen concentrations and stop to annotate nitrogen;
G, open ventilation fan 12, air-conditioning 13 and cleaner 14, distinguished and admirablely deliver to the digging laneway inner termination along ventilating duct 15 after treatment, and return, form circulated air, to reduce temperature and the dust concentration in the enclosure space from the tunnel.When the temperature in the enclosure space is not more than 30 ℃, air-conditioning 13 can be do not opened, when visibility can not opened cleaner 14 when 50m is above, when air-conditioning 13 and cleaner 14 are not opened, ventilation fan 12 can be do not opened.
H, workman enter under carrying out the condition of security protection and implement operation in the enclosure space;
I, monitor gas and oxygen concentration in the enclosure space in the exploitation process in real time, guaranteeing that gas density is higher than 20%, oxygen concentration is lower than and realizes under 12% the condition that coal gas adopts altogether.
Owing to be higher than 20% in the inner gas density of enclosure space, therefore can not blast, the various equipment that use in enclosure space need not explosion-proof; Simultaneously because the inner oxygen concentration of enclosure space is lower than 12%, and it is slack-off to make that various burnings damage, and goaf 13 interior fires are also retarded, so can reduce the input of and control goaf 13 fire anti-oxidation at metal.
Claims (7)
1. method is advanced in the common digging of heading coal gas, it is characterized in that:
A, after bord-up (5) driving is finished, in the coal seam, tunnel haulage drift (9) and heading (7) successively from bord-up (5);
B, in heading (7) interior construction one air conditioning cavern (11), and in air conditioning cavern (11), install booster (12), ventilating duct 15 (19), air-conditioning (13) and cleaner (14) successively;
C, install twice sealed door (1) at interval in haulage drift (9) entrance;
D, install the gas drainage under suction pipeline that leads to heading (7) in haulage drift (9) inside, the gas drainage under suction pipeline passes twice sealed door (1), implements gas drainage under suction, makes the air pressure in the confined space be about an atmospheric pressure;
Charge into nitrogen in e, the notes nitrogen chamber (3) between twice sealed door (1), nitrogen gas pressure is higher than ambient pressure 5～200Pa;
F, to the inner nitrogen injection of heading (7), and by gas drainage under suction pipeline extraction gas wherein, inner oxygen concentration is lower than 12% up to the tunnel;
G, unlatching ventilation fan (12), air-conditioning (13) and cleaner (14) are made circulated air, to reduce temperature and the dust concentration in the enclosure space;
H, workman are carrying out under the condition of security protection, enter and implement digging operation in the enclosure space;
I, monitor gas and oxygen concentration in the enclosure space in the exploitation process in real time, guaranteeing that gas density is higher than 20%, oxygen concentration is lower than and realizes under 12% the condition that coal gas adopts altogether.
2. heading coal gas according to claim 1 digging altogether advances method, and it is characterized in that: the supporting capacity of described sealed door (1) is not less than 1MPa.
3. mine coal gas according to claim 1 is adopted coal-mining method altogether, it is characterized in that: when there is outburst danger in definite coal seam, after bord-up (5) driving is finished, tunnel a return aircourse (6) again, the arc release tunnel (10) that (6) driving is connected with heading (7) from the return aircourse.
4. heading coal gas according to claim 3 altogether digging advances method, it is characterized in that: safe sealed door (2) is set in release tunnel (10), guarantees not have methane gas loss in the enclosure space.
5. adopt coal-mining method altogether according to claim 3 or 4 described mine coal gas, it is characterized in that: the safe sealed door (2) in release tunnel (10) is one or twice, when twice safety sealed door (2), between notes nitrogen chamber (3) in charge into nitrogen, make nitrogen gas pressure be higher than ambient pressure 5～200Pa.
6. mine coal gas according to claim 5 is adopted coal-mining method altogether, it is characterized in that: the supporting capacity of described safe sealed door (2) is 0.05～0.2MPa.
7. mine coal gas according to claim 3 is adopted coal-mining method altogether, it is characterized in that: with intersection inlet side, arc release tunnel (10) exploiting field sealed door (4) is set in return aircourse (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910234710 CN102061919B (en) | 2009-11-12 | 2009-11-12 | Co-mining tunneling method of seam roadway gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910234710 CN102061919B (en) | 2009-11-12 | 2009-11-12 | Co-mining tunneling method of seam roadway gas |
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| CN102061919A true CN102061919A (en) | 2011-05-18 |
| CN102061919B CN102061919B (en) | 2013-02-13 |
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| CN 200910234710 Expired - Fee Related CN102061919B (en) | 2009-11-12 | 2009-11-12 | Co-mining tunneling method of seam roadway gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536305A (en) * | 2012-03-06 | 2012-07-04 | 中国矿业大学 | Method for increasing permeability of inert gas and extracting gas |
| CN102587960A (en) * | 2012-03-22 | 2012-07-18 | 中国矿业大学 | Arrangement method of high gas coal seam extraction working face roadway |
| CN103397882A (en) * | 2013-08-08 | 2013-11-20 | 张兆银 | Coal mining method and mine structure capable of preventing underground coal mine gas explosion and combustion |
| CN104131815A (en) * | 2014-07-18 | 2014-11-05 | 山西晋城无烟煤矿业集团有限责任公司 | Fully-mechanized excavating roadway cross-operation construction process |
| CN106761747A (en) * | 2016-12-01 | 2017-05-31 | 中国矿业大学 | A kind of stoping method of highly gassy mine anaerobic working face |
| CN109236353A (en) * | 2018-09-21 | 2019-01-18 | 中铁十六局集团有限公司 | A kind of exposed coal protrusion-dispelling construction method in high methane Tunnel Passing coal seam |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19628367A1 (en) * | 1996-07-13 | 1998-01-15 | Ruhrkohle Ag | Coal-cutting sequence employed in underground mining |
| DE19706879A1 (en) * | 1997-02-21 | 1998-08-27 | Rag Ag | Method of planning caverns or hollow cavities for landfill in tectonically loaded mountain |
| CN1198046C (en) * | 2002-09-30 | 2005-04-20 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Working face J-type ventilating system |
| CN100560936C (en) * | 2007-03-28 | 2009-11-18 | 闫振东 | A kind of method of coal mine downhole reproduction and back production |
| CN101498225B (en) * | 2009-02-24 | 2012-08-22 | 太原理工大学 | U+I type ventilating system for top-coal caving face |
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2009
- 2009-11-12 CN CN 200910234710 patent/CN102061919B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536305A (en) * | 2012-03-06 | 2012-07-04 | 中国矿业大学 | Method for increasing permeability of inert gas and extracting gas |
| CN102587960A (en) * | 2012-03-22 | 2012-07-18 | 中国矿业大学 | Arrangement method of high gas coal seam extraction working face roadway |
| CN103397882A (en) * | 2013-08-08 | 2013-11-20 | 张兆银 | Coal mining method and mine structure capable of preventing underground coal mine gas explosion and combustion |
| CN103397882B (en) * | 2013-08-08 | 2015-12-23 | 张兆银 | A kind of coal-mining method and mine structure preventing gas explosion in underground coal mines and burning |
| CN104131815A (en) * | 2014-07-18 | 2014-11-05 | 山西晋城无烟煤矿业集团有限责任公司 | Fully-mechanized excavating roadway cross-operation construction process |
| CN104131815B (en) * | 2014-07-18 | 2016-03-02 | 山西晋城无烟煤矿业集团有限责任公司 | Full-mechanized roadway cross-operation construction technology |
| CN106761747A (en) * | 2016-12-01 | 2017-05-31 | 中国矿业大学 | A kind of stoping method of highly gassy mine anaerobic working face |
| CN106761747B (en) * | 2016-12-01 | 2019-01-11 | 中国矿业大学 | A kind of stoping method of highly gassy mine anaerobic working face |
| CN109236353A (en) * | 2018-09-21 | 2019-01-18 | 中铁十六局集团有限公司 | A kind of exposed coal protrusion-dispelling construction method in high methane Tunnel Passing coal seam |
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| CN102061919B (en) | 2013-02-13 |
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