CN110067591A - Tunnel and flat lead pass through coal seam construction gas drainage method - Google Patents
Tunnel and flat lead pass through coal seam construction gas drainage method Download PDFInfo
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- CN110067591A CN110067591A CN201810068642.3A CN201810068642A CN110067591A CN 110067591 A CN110067591 A CN 110067591A CN 201810068642 A CN201810068642 A CN 201810068642A CN 110067591 A CN110067591 A CN 110067591A
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- 239000003245 coal Substances 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005641 tunneling Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 229920002396 Polyurea Polymers 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 13
- 238000005553 drilling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Tunnel and flat lead pass through coal seam construction gas drainage method, are related to Tunnel Engineering technology, and the present invention includes the following steps: the 1) tunneling direction along main tunnel, and at least one flat guide hole hole is arranged independently of main tunnel；2) it in the flat guide hole hole of step 1), drills to coal seam direction, is formed to put down and lead extraction hole and main tunnel extraction hole, flat to lead the coal seam that extraction hole is drilled into front of flat guide hole hole, main tunnel extraction hole is drilled into the coal seam in front of main tunnel；3) extraction hole is led and main tunnel extraction hole draws out methane and flat guide hole hole is discharged from flat.The present invention realizes that tunnel and flat lead pass through coal-bed gas advance drainge, and procedure connection is compact, and strong operability, gas drainage results are reliable, and meets energy-saving and environment-friendly requirement.
Description
Technical field
The present invention relates to Tunnel Engineering technology, in particular to the advanced flat gas tunnel led of setting pass through coal seam construction with watt
This extraction structure.
Background technique
Coal and gas prominent is the serious natural calamity of one of tunneling processes such as coal mine, Tunnel Engineering, and when generation can break
It ruins roadway facility, destroy mine ventilation system, so that coal petrography and gas is poured out, impact is hurted sb.'s feelings, and coal stream buries people, and gas causes people
Member's asphyxia, even results in serious gas and coal-dust explosion, causes the massive losses such as production disruption, casualties.
In coal and gas prominent, the outburst hazard of stone door punching coal is maximum, intensity of outburst also highest.Especially high-speed iron
Road tunnel piercing section is big, and general section reaches 140m2 or more, and the outburst hazard of stone door punching coal is compared with coal cutting roadway and general speed, list
Threaded list road is bigger, and intensity of outburst is also higher.Large cross-section tunnel stone door punching coal occur prominent feature be intensity is big, gas amount is big,
Involve wide, destruction is big, and harm is serious.For the big cross section high-speed rail tunnel built in southwestern Yunnan, the expensive main coal-producing area, pick
Several even more than ten coal seams need to be passed through into a crossdrift, there are different degrees of outburst hazards in each coal seam, wear coal stratum
Safe protrusion-dispelling and rapid uncovering coal problem just seem especially prominent.
Coal and gas prominent is prevented and treated for coal measure strata tunnel, borehole discharging technology is generallyd use, gas is passed through into drilling
It is discharged into tunnel construction environment, recycles outside ventilation discharge hole, and monitoring measure is taken to be controlled.Above-mentioned measure and method
There are certain passivitys, most of gas could not be directly discharged to outside hole before gas enters construction environment, increase and apply
The gas density of work environment increases the tunnel ventilation time, increases energy consumption and equipment investment, and cannot effectively prevent watt
This is protruded, and brings great security risk to construction, need a kind of new tunnel and it is flat lead pass through coal bed gas drainage structure with
It solves the problems, such as this, and has the characteristics that easy for construction, safe and reliable, quick, economical, and meet energy-saving and environment-friendly requirement.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of tunnels and flat lead to pass through coal seam construction gas drainage under suction side
Method has the characteristics that easy for construction, safe and reliable, quick, economical.
The present invention solve the technical problem the technical solution adopted is that, tunnel and flat lead are passed through coal seam construction and are taken out with gas
Put method, which is characterized in that include the following steps:
1) along the tunneling direction of main tunnel, at least one flat guide hole hole is set independently of main tunnel；
2) it in the flat guide hole hole of step 1), drills to coal seam direction, is formed to put down and lead extraction hole and main tunnel extraction hole, it is flat to lead
Extraction hole is drilled into the coal seam in front of flat guide hole hole, and main tunnel extraction hole is drilled into the coal seam in front of main tunnel；
3) extraction hole is led and main tunnel extraction hole draws out methane and flat guide hole hole is discharged from flat.
Further, described put down leads at least 4, extraction hole, at least 4, main tunnel extraction hole.Each put down leads extraction hole
Coal seam all is drilled into a manner of to coal seam directional divergence with main tunnel extraction hole.
In the step 3), parameters described below: the pumping volume of gas, concentration, pressure difference, temperature, air pressure is monitored.
The beneficial effects of the present invention are:
(1) realize that tunnel and flat lead pass through coal-bed gas advance drainge, procedure connection is compact, strong operability, extraction effect
Fruit is reliable, and meets energy-saving and environment-friendly requirement.
(2) the disposable gas drainage under suction of concentration for realizing more set coal seams in coal measure strata section, realizes coal measure strata
Section extinction reduces the construction period 6~8 months, and can reduce extraction drilling hole amount 37%, pole compared with the discharge of coal seam one by one
Big raising construction efficiency, cost saving provide good condition for fast and safely exposed coal.
(3) it realizes main tunnel and flat lead shares the disposable extraction completion of a set of gas drainage system, avoid area one by one
3 months main tunnel gas drainage under suction durations are saved in the independent extraction in face.
(4) eminence is discharged outside the direct extraction to hole of gas, avoids borehole discharging method for drawing-off gas to constructing tunnel ring
Domestic problem can make ventilation time shorten 56%, and equipment energy consumption is greatly reduced, and saves a large amount of engineering costs, while can be effective
Reduce gas exceeding limit bring construction safety risk in tunnel.
(5) using extraction drill samples of coal pulled, can fast-field evaluation coal seam gas-bearing capacity index, carry out the inspection of protrusion-dispelling effect
It tests, efficiently solves coal measure strata tunnel and the flat fast and safely exposed coal construction problem led.
Detailed description of the invention
Fig. 1 is floor map of the invention；
Fig. 2 is drainage system arrangement schematic diagram outside hole of the invention；
Marked in the figure: tunnel main tunnel 1, flat guide hole hole 2, drill site 3, main tunnel extraction field 4, it is flat lead extraction field 5, extraction pipeline 6,
Drainage system 7 outside hole, flat leads extraction hole 9, coal seam 10, gas density and Pressure monitoring instrument 11, water-proof gate valve at main tunnel extraction hole 8
12, gas flowmeter 13, negative pressure drainage pump 14, switchgear house 15, monitoring room 16, water cooling pond 17.
Specific embodiment
Technology contents of the invention are: before tunnel exposed coal, drill site being arranged in the flat guide hole hole of advanced main tunnel driving
(referred to as flat leads) sets the peace guide of main tunnel extraction field in the hole wall of drill site respectively and puts field outside the abutment wall of main tunnel side, to main tunnel and
Flat leading side coal seam distributing network shape drilling, it is entirely thick through coal seam from drill site to main tunnel and flat leading side's coal bed drilling, pass through brill
The gas in coal seam is discharged in hole extraction in advance, reaches the gas section gas drainage results of non-pressure released seam.It is produced using gas suction pump
Raw air negative pressure, by drilling and pipeline extraction not by the coal-bed gas of mining influence, by coal measures in front of tunnel front
Gas in interval, which is disposably extracted into outside hole, carries out high altitude discharge.Gas drainage system is mainly by gas suction pump, extraction safety
Ensure equipment, extraction pipeline, gas drainage under suction monitoring and control equipment, plumbing equipment and pipeline, pump house distribution system, water cooling pond
Deng composition, extraction, which reaches safety standard through validity check after completing, can open coal seam.
Extraction hole sealing material is used as using modified polyurea acid esters foamed material substitution cement mortar (or polyurethane), it is novel
Sealing material has excellent strength and toughness, higher gas barrier property and resistance to shrinkage, with gas drainage pipe and coal petrography
Body adhesion strength is high, and sealing of hole speed is fast, and sealing effect is good.
Referring to Figures 1 and 2.
It is flat to lead 2 area surface constructions and be ahead of 1 certain distance of tunnel main tunnel；
Drill site 3 is arranged outside neighbouring main tunnel side hole wall in flat lead；
Latticed main tunnel extraction hole 8 is arranged, to main tunnel coal in main tunnel extraction field 4 on hole wall of the drill site towards main tunnel direction
Layer 10 carries out gas drainage under suction；
It is flat to lead extraction field 5, drill site towards arranged on the flat hole wall for leading face direction it is latticed it is flat lead extraction hole 9, it is right
Flat coal seam 10 of leading carries out gas drainage under suction；
Extraction pipeline 6 is connected to the aperture of each extraction drilling using seamless steel pipe, by main tunnel and flat leads extraction field
Branch pipe is finally pooled to extraction main line, and main line is laid with from extraction working face to extraction station outside hole；
Drainage system 7 outside hole are set to tunnel portal outer space spacious field and are located in；Gas density and Pressure monitoring instrument 11, setting
Concentration and pressure real-time monitoring between extraction supervisor and draw-off pump station, to gas in pipeline；
Water-proof gate valve 12 is set to 6 end of extraction pipeline；
Gas flowmeter 13 is set to 14 front end of negative pressure drainage pump；
Negative pressure drainage pump 14 is made of (one spare) 2 gas suction pumps；Switchgear house 15 is set in extraction station,
Supply drainage pump electric power；Monitoring room 16, it is adjacent with switchgear house 15, gas drainage under suction is monitored and is controlled, certainly configured with gas
Dynamic alarm；
Water cooling pond 17 is set to outside extraction station.The structure efficiently solves tunnel and flat lead passes through coal seam section coal and gas
The problem that prominent prevention and treatment or gas drilling discharge security risk are high, work efficiency is low, energy consumption is high, and have it is easy for construction, safe and reliable,
Quickly, the features such as economic, and meet energy-saving and environment-friendly requirement, there is wide popularization and application foreground.
Drill site 3, which acts on, is to provide main tunnel and the flat cavern for leading coal bed gas drainage, and the size of drill site 3 is long 10m × height
6.2m × depth 6m, inside, which is respectively arranged main tunnel extraction field 4 and puts down, leads extraction field 5, main tunnel extraction hole 8, the flat aperture for leading extraction hole 9
Diameter is 120mm, spacing 0.3m, and setting of casing infuses foamed material closed orifices and installs gas-slag separation device after creeping into 10m, is starched
Along the effective 94mm diameter drilling rod normal drill of set after liquid condensation.Grid-shaped arrangement in region, drilling control model are being taken out in drilling in advance
It encloses for tunnel excavation contour line top and two sides each 15m and bottom 10m, whole hole penetrates coal seam 10, and to form 2m × 2m latticed, and
Into seat earth 0.5m.
The drainage system 7 outside hole of extraction pipeline 6 is laid with to the peaceful working face for leading extraction field 5 in main tunnel extraction field 4, releasing pipe
Road 6 uses Ф 212mm seamless steel pipe, is installed on the pipe support of flat guide margin wall, and pipe support height is not less than 30cm, and extraction pipeline 6 connects
Head adds rubber seal to connect with ring flange.Extraction 8 apertures of drilling are connect using DN50 mm mining hose with extraction pipeline 6, and
Gas density and Pressure monitoring instrument 11 are installed to control negative pressure of suction and be monitored to gas density.Drainage system 7 is answered outside hole
It is located at geological conditions reliably band, avoids coming down, collapse, places, the surrounding 50m range such as tomography are forbidden having open fire, examined as far as possible
That considers inlet and outlet piping is laid with leeway that is convenient and expanding energy.
Negative pressure power needed for the effect of negative pressure drainage pump 14 is to provide gas drainage under suction, type selecting combination gas drainage parameter and construction feelings
Condition carries out calculating determination, and retains certain surplus capacity, need to meet the related requirement of mine anti-explosion electrical equipment manufacture, and has
Feature structurally reasonable, small in size, easy to install, easy to operate, safe and reliable to operation.Gas flowmeter 13 carries out gas drainage amount
Monitoring, gas flowmeter 13 are mounted on the outlet end of extraction pipeline 6, gas drainage amount, concentration, pressure in daily real-time testing pipe
Difference, temperature and air pressure, when any parameter-beyond-limit, capable of emitting sound and light alarm signal, and by given program stopped or starting.
16 function of monitoring room is the real-time monitoring of draw-off pump station, selects environment gas concentration monitoring sensor, pressure relay
Device and gas breaker etc. mix amount, standard scale, drainage pump working condition to draw-off pump station environment gas density, temperature, standard
Real-time monitoring is carried out with the power supply system of operating condition amount, service position and pumping plant etc..
Claims (5)
1. tunnel and flat lead pass through coal seam construction gas drainage method, which is characterized in that include the following steps:
1) along the tunneling direction of main tunnel, at least one flat guide hole hole is set independently of main tunnel；
2) it in the flat guide hole hole of step 1), drills to coal seam direction, is formed to put down and lead extraction hole and main tunnel extraction hole, it is flat to lead extraction
Hole is drilled into the coal seam in front of flat guide hole hole, and main tunnel extraction hole is drilled into the coal seam in front of main tunnel；
3) extraction hole is led and main tunnel extraction hole draws out methane and flat guide hole hole is discharged from flat.
2. tunnel as described in claim 1 and flat lead pass through coal seam construction gas drainage method, which is characterized in that described flat
Lead at least 4, extraction hole, at least 4, main tunnel extraction hole.
3. tunnel as described in claim 1 and flat lead pass through coal seam construction gas drainage method, which is characterized in that the step
It is rapid 3) in, monitor parameters described below: the pumping volume of gas, concentration, pressure difference, temperature, air pressure.
4. tunnel as claimed in claim 2 and flat lead pass through coal seam construction gas drainage method, which is characterized in that each put down is led
Extraction hole and main tunnel extraction hole are all drilled into coal seam in a manner of to coal seam directional divergence.
5. tunnel as claimed in claim 2 and flat lead pass through coal seam construction gas drainage method, which is characterized in that use and change
Property polyureas acid esters foamed material as the flat sealing material for leading extraction hole and main tunnel extraction hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068642.3A CN110067591A (en) | 2018-01-24 | 2018-01-24 | Tunnel and flat lead pass through coal seam construction gas drainage method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068642.3A CN110067591A (en) | 2018-01-24 | 2018-01-24 | Tunnel and flat lead pass through coal seam construction gas drainage method |
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| CN110067591A true CN110067591A (en) | 2019-07-30 |
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| CN201810068642.3A Pending CN110067591A (en) | 2018-01-24 | 2018-01-24 | Tunnel and flat lead pass through coal seam construction gas drainage method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219203A (en) * | 2020-03-19 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Gas discharge system of supplementary gallery |
| CN111396127A (en) * | 2020-02-27 | 2020-07-10 | 中铁十九局集团第三工程有限公司 | Intelligent tunnel gas monitoring and processing device and control system thereof |
| CN111396118A (en) * | 2020-03-19 | 2020-07-10 | 贵州盘江精煤股份有限公司 | Coal seam group rapid rock cross-cut coal uncovering outburst eliminating method |
| CN112324489A (en) * | 2020-12-08 | 2021-02-05 | 湖南科技大学 | Gas drainage drill hole arrangement method for large-section tunnel penetrating through coal seam with small included angle |
| CN112832849A (en) * | 2021-03-24 | 2021-05-25 | 中铁二院重庆勘察设计研究院有限责任公司 | Method for removing outburst by combined pumping and drainage of main tunnel and flat guide gas of outburst coal seam with complex structure |
| CN115977721A (en) * | 2023-02-14 | 2023-04-18 | 中铁隧道集团一处有限公司 | Advanced outburst-prevention drilling hole pumping drainage method for high-low drill sites of slow-inclination coal seam of high-speed railway tunnel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396127A (en) * | 2020-02-27 | 2020-07-10 | 中铁十九局集团第三工程有限公司 | Intelligent tunnel gas monitoring and processing device and control system thereof |
| CN111219203A (en) * | 2020-03-19 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Gas discharge system of supplementary gallery |
| CN111396118A (en) * | 2020-03-19 | 2020-07-10 | 贵州盘江精煤股份有限公司 | Coal seam group rapid rock cross-cut coal uncovering outburst eliminating method |
| CN112324489A (en) * | 2020-12-08 | 2021-02-05 | 湖南科技大学 | Gas drainage drill hole arrangement method for large-section tunnel penetrating through coal seam with small included angle |
| CN112832849A (en) * | 2021-03-24 | 2021-05-25 | 中铁二院重庆勘察设计研究院有限责任公司 | Method for removing outburst by combined pumping and drainage of main tunnel and flat guide gas of outburst coal seam with complex structure |
| CN115977721A (en) * | 2023-02-14 | 2023-04-18 | 中铁隧道集团一处有限公司 | Advanced outburst-prevention drilling hole pumping drainage method for high-low drill sites of slow-inclination coal seam of high-speed railway tunnel |
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