CN108590739B - A kind of prominent tunnel regionality energy divides source to control anti-burst method - Google Patents

A kind of prominent tunnel regionality energy divides source to control anti-burst method Download PDF

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Publication number
CN108590739B
CN108590739B CN201810320277.0A CN201810320277A CN108590739B CN 108590739 B CN108590739 B CN 108590739B CN 201810320277 A CN201810320277 A CN 201810320277A CN 108590739 B CN108590739 B CN 108590739B
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China
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drilling
layer
energy
coal
pipe
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CN108590739A (en
Inventor
张建国
翟成
吕有厂
徐吉钊
张晋京
辛海会
王满
仝艳军
孙勇
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CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP CO LTD
China University of Mining and Technology CUMT
Pingdingshan Tianan Coal Mining Co Ltd
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CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP CO LTD
China University of Mining and Technology CUMT
Pingdingshan Tianan Coal Mining Co Ltd
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Priority to CN201810320277.0A priority Critical patent/CN108590739B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/18Drilling by liquid or gas jets, with or without entrained pellets
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/003Machines for drilling anchor holes and setting anchor bolts

Abstract

The invention discloses a kind of prominent tunnel regionality energy, and source to be divided to control anti-burst method, method includes the following steps: in floor roadway to apart from coal road two sides coal seam construction drill;Hydraulic slotted liner technique is carried out to drilling or hydraulic flushing in hole realizes release, then carries out negative pressure extraction;Layer-through drilling and tough skeleton is penetrated to constructing apart from coal road two sides coal seam in floor roadway, cement mortar is injected in layer-through drilling by grouting pump, after cement mortar solidification, creeps into horizontal drilling to two sides in coal road, anchor cable is sent into horizontal drilling, anchor cable is fixed with anchor net and anchor disk.The present invention divides source Controlling principle using energy, and reduction and the efficient extraction of gas are on the one hand punched out within the scope of the two sides of tunnel, forms atenuator region;On the other hand the coal and rock of tunnel distal extent is reinforced, forms strengthening region, partition absorption is carried out to Gas Outburst Energy by atenuator region, is put up a resistance by strengthening region to gas residual amount of energy, roadway deformation is effectively reduced.

Description

A kind of prominent tunnel regionality energy divides source to control anti-burst method
Technical field
The present invention relates to a kind of prominent tunnel regionality energy, and source to be divided to control anti-burst method, is particularly suitable for coal roadway tunneling The operations such as effective protrusion-dispelling and control roadway deformation in the process.
Background technique
Coal and gas prominent is one of the disaster the most serious that China's highly gassy mine faces.With adopt deep increase and The increase of exploitation scale, the coal and gas prominent that highly gassy mine faces threaten further serious.Especially during coal roadway tunneling Heading end nearby easily causes energy abnormal accumulation, and discharges suddenly, the final generation for inducing gas accident.
To prevent gas accident, region gas entirety release is that the current high methane low permeability outburst coal seam that solves is dug Into the major measure of gas problem in the process.By region measure, working face indices are made to reach specified value hereinafter, reduction office The construction of portion's measure is the direction of gas control.Conventional outburst prevention measures be primarily present extraction borehole quantity is more, project amount is big, The deficiencies of period is long largely restricts safety production efficiency.Hydraulic flushing in hole exists in terms of release, raising coal seam permeability Certain positive effect, but single waterpower measure be easy to cause a wide range of coal body in coal road two sides soft, globality and Intensity is greatly reduced, and large deformation occur in later period roadway's sides and the probability of collapsing phenomenon increases, and greatly increases later period tunnel dimension Cost is protected, brings adverse effect for the safe working in coal seam.Therefore, it is necessary to change the single measure of traditional coal seam tunnel protrusion-dispelling, needle The energy source discharged to prominent process is starting point, divides source Controlling principle using energy, roadway deformation is effectively reduced.
Summary of the invention
Goal of the invention: it the invention aims to overcome the shortcoming in prior art, is discharged from Coal Outburst energy The angle effectively controlled provides a kind of protrusion tunnel regionality energy point source control protrusion-dispelling side easy to operate, easy for construction Method is truly realized efficient protrusion-dispelling and improves tunnel into lane rate.
To achieve the goals above, present invention employs the following technical solutions: a kind of prominent tunnel regionality energy point Source controls anti-burst method, method includes the following steps:
A, construction drill: in floor roadway to the coal seam construction drill within the scope of the D1 of coal road two sides;
B, stress pre-released hydraulically and gas drainage: carrying out hydraulic slotted liner technique or hydraulic flushing in hole to drilling, and drilling is made to generate a large amount of seam Slot realizes release, gas drainage pipe is sent into drilling after release, and is sealed with polyurethane to drilling orifice, finally Gas drainage pipe connection methane gas extraction pipeline is subjected to negative pressure extraction;
C, region reinforcement: after the gas density in gas drainage pipe is up to standard, in floor roadway to apart from coal road two sides D2 Coal seam construction layer-through drilling in range, D2 < D1, layer-through drilling pass through coal seam, tough skeleton, Grouting Pipe and return pipe are sent into In layer-through drilling, and layer-through drilling aperture is sealed with high pressure resistant hole packer, Grouting Pipe connects slip casting by high-pressure rubber pipe Pump is injected the cement mortar of slurry storing tank in layer-through drilling by grouting pump, pass when return pipe persistently has cement mortar outflow Return pipe is closed, and continues grouting with pressure after five minutes, closes Grouting Pipe;
D, second zone is reinforced: after the cement mortar solidification in layer-through drilling, horizontal drilling is crept into two sides in coal road, Anchor cable is sent into horizontal drilling, anchor cable is fixed with anchor net and anchor disk.
Further, the D1 is 15m, and bore diameter 130mm, the spacing of wells is 0.5~2m;D2 is 5m, wears layer brill The diameter in hole is 150mm, and layer-through drilling spacing is 1~4m.
Further, the horizontal drilling and layer-through drilling interlaced arrangement.
Further, the tough skeleton is metal steel pipe or obdurability pvc pipe.
Further, accelerator is inserted in cement mortar, the layer-through drilling single hole slip casting time controls within 30min, note Liquid pump input pressure range is 3~10MPa.
The utility model has the advantages that
(1) after hydraulic slotted liner technique or hydraulic flushing in hole processing, the coal body pore pressure in the region reduces atenuator region, By the effective extraction of prolonged gas, gas density and pressure can drop to inrush critical value hereinafter, significantly reducing The Gas Outburst possibility in the region, on the other hand, the region weak seam produce primary coal seam abnormal pressure accumulation at a distance Raw energy transmission plays the role of playing absorption dissipation, reflection partition, on the one hand the presence in strengthening region coal seam can be improved Coal seam in-situ globality and intensity play facilitation for coal road molding, on the other hand can be residual to what is far passed over Complementary energy is actively resisted, and coal road deformation is effectively reduced;
(2) layer-through drilling and horizontal drilling are formed space crossed, enhance the globality of strengthening region range;
(3) present invention uses the protrusion safety of coal tunnel governance model of " weak-strong test energy-absorbing, the anti-energy in strong region ", for reducing coal Layer gas pressure ensures coal road service life, reduces roadway maintenance cost etc. with good superiority.
Detailed description of the invention
Fig. 1 is waterpower measure construction drill schematic diagram of the invention.
Fig. 2 is gas drainage schematic diagram of the invention.
Fig. 3 is strengthening region and atenuator region overall schematic of the invention.
Fig. 4 is tough skeleton and slip casting schematic diagram in strengthening region of the invention.
Fig. 5 is strengthening region entirety diagrammatic cross-section of the invention.
Fig. 6 is coal seam entirety sectional schematic diagram of the invention.
In figure: 1-floor roadway;2-coal seams;3-coal roads;4-drillings;5-slots;6-polyurethane;7-gas are taken out Put pipe;8-layer-through drillings;9-tough skeletons;10-cement mortar;11-Grouting Pipes;12-return pipes;13-high pressure resistant envelopes Hole device;14-grouting pumps;15-high-pressure rubber pipes;16-slurry storing tanks;17-horizontal drillings;18-anchor cables, 19- atenuator region, 20- Strengthening region.
Specific embodiment:
Further explanation is done to the present invention with reference to the accompanying drawing.
As shown in Figures 1 to 6, a kind of prominent tunnel regionality energy of the invention divides source to control anti-burst method, and feature exists In, method includes the following steps:
A, construction drill: in floor roadway 1 to 2 construction drill 4 of coal seam within the scope of 3 two sides 15m of coal road, drilling 4 Diameter is 130mm, and 4 spacing of drilling are 0.5~2m;
B, stress pre-released hydraulically and gas drainage: carrying out hydraulic slotted liner technique or hydraulic flushing in hole to drilling 4, generates drilling 4 a large amount of Slot 5 realizes release, and gas drainage pipe 7 is sent into drilling 4 after release, and is carried out with 6 pairs of polyurethane 4 apertures of drilling close Gas drainage pipe 7 is finally connected methane gas extraction pipeline and carries out negative pressure extraction, to be formed within the scope of 3 two sides 15m of coal road by envelope Atenuator region 19;
C, region reinforcement: after the gas density in gas drainage pipe 7 is up to standard, in floor roadway 1 to apart from 3 two sides of coal road The construction of coal seam 2 layer-through drilling 8 within the scope of 5m, layer-through drilling 8 pass through coal seam 2, and the diameter of layer-through drilling 8 is 150mm, wear layer brill 8 spacing of hole is 1~4m, tough skeleton 9, Grouting Pipe 11 and return pipe 12 is sent into layer-through drilling 8, and with high pressure resistant hole packer 13 pairs of 8 apertures of layer-through drilling are sealed, wherein the preferred metal steel pipe of tough skeleton 9 or obdurability pvc pipe, Grouting Pipe 11 pass through High-pressure rubber pipe 15 connects grouting pump 14, is injected the cement mortar 10 of slurry storing tank 16 in layer-through drilling 8 by grouting pump 14, in order to Guarantee that cement mortar 10 quickly solidifies, accelerator is inserted in cement mortar 10, the control of 8 single hole slip casting time of layer-through drilling exists Within 30min, 14 input pressure range of topping-up pump is 3~10MPa, closing when return pipe 12 persistently has the outflow of cement mortar 10 Return pipe 12, and continue grouting with pressure after five minutes, close Grouting Pipe 11;
D, second zone is reinforced: after the cement mortar 10 in layer-through drilling 8 solidifies, creeping into level to two sides in coal road 3 Drilling 17, horizontal drilling 17 and 8 interlaced arrangement of layer-through drilling arrange row of horizontal drilling 17 between adjacent two rows layer-through drillings 8, Anchor cable 18 is sent into horizontal drilling 17, anchor cable 18 is fixed with anchor net and anchor disk, thus in 2 coal road of coal seam, 3 two sides 5m Strengthening region 20 is formed in range.
The present invention changes the single measure of traditional coal seam tunnel protrusion-dispelling, and the energy source discharged for prominent process is to set out Point divides source Controlling principle using energy, by using hydraulic slotted liner technique or hydraulic flushing technology, within the scope of the 15m of tunnel two sides into Row punching reduction, promotes the efficient extraction of gas, reduces gas and crustal stress, forms atenuator region 19;It constructs later layer-through drilling And it is inserted into tough skeleton, enter top top plate across coal seam, using bored grouting, the coal and rock of 5m range on the outside of tunnel is carried out It reinforces, improves integral strength, form strengthening region 20, the energy discharged when by atenuator region 19 to Gas Outburst separates It absorbs, is put up a resistance by strengthening region 20 to gas residual amount of energy, roadway deformation is effectively reduced.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (5)

1. a kind of prominent tunnel regionality energy divides source to control anti-burst method, which is characterized in that method includes the following steps:
A, construction drill: in floor roadway (1) to coal seam (2) construction drill (4) within the scope of coal road (3) two sides D1;
B, stress pre-released hydraulically and gas drainage: carrying out hydraulic slotted liner technique or hydraulic flushing in hole to drilling (4), makes to drill (4) generation largely Slot (5) realizes release, gas drainage pipe (7) is sent into drilling (4) after release, and with polyurethane (6) to drilling (4) Aperture is sealed, and gas drainage pipe (7) connection methane gas extraction pipeline is finally carried out negative pressure extraction;
C, region reinforcement: after the gas density in gas drainage pipe (7) is up to standard, in floor roadway (1) to apart from coal road (3) two Coal seam (2) within the scope of the D2 of side is constructed layer-through drilling (8), and D2 < D1, layer-through drilling (8) passes through coal seam (2), by tough skeleton (9), Grouting Pipe (11) and return pipe (12) are sent into layer-through drilling (8), and with high pressure resistant hole packer (13) to layer-through drilling (8) Aperture is sealed, and Grouting Pipe (11) is by high-pressure rubber pipe (15) connection grouting pump (14), by grouting pump (14) by slurry storing tank (16) it in cement mortar (10) injection layer-through drilling (8), is closed when return pipe (12) persistently has cement mortar (10) outflow Return pipe (12), and continue grouting with pressure after five minutes, it closes Grouting Pipe (11);
D, second zone is reinforced: after cement mortar (10) solidification in layer-through drilling (8), creeping into water to two sides in coal road (3) Anchor cable (18) are sent into horizontal drilling (17), anchor cable (18) are fixed with anchor net and anchor disk by flat drill hole (17).
2. a kind of prominent tunnel regionality energy according to claim 1 divides source to control anti-burst method, it is characterised in that: institute Stating D1 is 15m, and drilling (4) diameter is 130mm, and drilling (4) spacing is 0.5~2m;D2 is 5m, and the diameter of layer-through drilling (8) is 150mm, layer-through drilling (8) spacing are 1~4m.
3. a kind of prominent tunnel regionality energy according to claim 1 divides source to control anti-burst method, it is characterised in that: institute State horizontal drilling (17) and layer-through drilling (8) interlaced arrangement.
4. a kind of prominent tunnel regionality energy according to claim 1 divides source to control anti-burst method, it is characterised in that: institute Stating tough skeleton (9) is metal steel pipe or obdurability pvc pipe.
5. a kind of prominent tunnel regionality energy according to claim 1 divides source to control anti-burst method, it is characterised in that: water Accelerator is inserted in cement mortar (10), layer-through drilling (8) single hole slip casting time controls within 30min, topping-up pump (14) input Pressure limit is 3~10MPa.
CN201810320277.0A 2018-04-11 2018-04-11 A kind of prominent tunnel regionality energy divides source to control anti-burst method Active CN108590739B (en)

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CN111456802A (en) * 2020-04-22 2020-07-28 广东省怡合建设有限公司 Highway tunnel coal seam coal uncovering outburst prevention construction method

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RU2121062C1 (en) * 1997-04-15 1998-10-27 Московский государственный горный университет Method of withdrawal of methane from coal bed
CN101482026B (en) * 2009-02-10 2011-01-19 河南理工大学 Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method
CN101644166A (en) * 2009-07-14 2010-02-10 中国矿业大学 Method for extracting gas from high gas low permeability coal seam by punching, slotting, pressure releasing, and permeability increasing
CN102900460B (en) * 2012-11-06 2014-10-29 中国矿业大学 Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam
CN102926774B (en) * 2012-11-20 2015-07-08 安徽理工大学 Bolting and grouting process for governing roadway floor heave
CN103195467B (en) * 2013-04-02 2015-02-25 重庆市能源投资集团科技有限责任公司 Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method
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