CN102900460B - Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam - Google Patents
Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam Download PDFInfo
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- CN102900460B CN102900460B CN201210437230.5A CN201210437230A CN102900460B CN 102900460 B CN102900460 B CN 102900460B CN 201210437230 A CN201210437230 A CN 201210437230A CN 102900460 B CN102900460 B CN 102900460B
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Abstract
The invention discloses a method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on a soft and high-outburst coal seam, and in particular is applied to quick tunneling in a coal seam which is high in outburst danger and a laneway is difficult to support in a coal mine. The method comprises the following steps of: forming a network type fractured net by high-pressure jet flow seam cutting, pressure relief and permeability enhancement technologies, and enhancing an effect of extracting strip-type coal seam gas on a coal laneway subjected to through-going drilling and pre-extraction; and forming a network type filling region by pressing and injecting filling materials, so that the strength and stress distribution of a coal body are improved, the coal laneway is easy to maintain in the tunneling process, a phenomenon that the gas rushes out of a tunneled laneway is avoided, gas accidents are eliminated in the tunneling process, and an aim of safely and quickly tunneling the laneway is fulfilled.
Description
Technical field
The present invention relates to a kind of speedy drivage method, be especially a kind ofly applicable in colliery, there is strong outburst hazard, the prominent coal seam of soft height in supporting difficulty coal seam wears the anti-reflection and speedy drivage method of layer slot release.
Background technology
The exploitation in the prominent coal seam of soft height is accompanied by a large amount of Gas, and outstanding threat is larger, and the soft coal roadway support difficulty that causes of ature of coal, seriously restricts mine safety and produces fast.At present; cannot exploit topping time; mainly solve the gas problem in the tunneling process of high prominent coal seam by taking out in advance coal-bed gas; but; conventional gas pumping method exists single hole gas pumping effective range little; drilling construction workload is large, and extraction efficiency deficiency on the low side, cannot effectively solve the gas hazard in tunneling process.Because ature of coal in coal road tunneling process is soft and pressure is larger, roadway maintenance is very difficult, wastes a large amount of manpower and materials, affects programming, causes debalance of preparation and winning work.
Summary of the invention
Technical problem: the object of the invention is for the problem existing in prior art, provide the prominent coal seam of a kind of soft height to wear the anti-reflection and speedy drivage method of layer slot release, by adopting the anti-reflection technology of base plate layer-through drilling high-pressure spray slot release, form network type fracture network, strengthening layer-through drilling is taken out the extracting result of coal road band coal-bed gas in advance; And by pressure injection filler, form network type filling area, with improve heading around the Strenth and stress of coal body distribute, make that maintenance in coal road tunneling process becomes easily, eliminate the Gas Disaster in tunneling process, thereby realize driving safely and fast.
Technical scheme: the anti-reflection and speedy drivage method of layer slot release is worn in the prominent coal seam of soft height of the present invention: be included in and move towards cloth bottom set along work plane in seat earth rock stratum and take out lane, in Di Chou lane, arrange drill site, in each drill site in Cong Dichou lane, wear a layer slot hole to the construction of coal seam direction, until through coal seam, to carrying out high-pressure hydraulic slot in coal seam, implement afterwards gas pumping; Characterized by further comprising following steps:
A, multiple drill sites that arrangement pitch is 6 ~ 8m in described Di Chou lane, each drill site is arranged layer slot hole of wearing of 5 ~ 7 linear distributions in coal seam, the whole pitch of holes of wearing layer slot hole is 6 ~ 8m;
B, before the heading digging time 30 ~ 50 days, stop gas pumping to wearing a layer slot hole near a row of pre-pick both sides, heading position, wear in layer slot hole pressure injection filler successively by grouting pump to a row who stops gas pumping, the coal body of pre-pick heading both sides is reinforced;
Gas pumping is continued in layer slot hole of wearing of c, not filling;
D, before the heading digging time 5 ~ 7 days, test to gas pumping effect, reaches after " control coal and Gas Outburst regulation " requirement, can tunnel according to a conventional method heading in the heading time of digging;
E, in driving heading process, continue to wear in layer slot hole pressure injection filler successively near a row of pre-pick both sides, heading position, two rows that ensure filling successively wear a layer slot hole site and answer advance development head to be not less than 50m.
Described each drill site is worn layer number in slot hole according to seam inclination and is worn layer radius of influence in slot hole and determine.
When described heading starts to tunnel, coal body is reinforced distance need exceed 50m.
Beneficial effect: it is anti-reflection that the present invention carries out release by mine floor rock gangway layer-through drilling inner high voltage jet slot to the prominent coal seam of height, improve layer-through drilling and take out in advance the extracting result of coal road band coal-bed gas, eliminate the high gas gradient in coal seam, reduce the gas emission in heading tunneling process, improve heading driving speed; And by pressure injection filler, form network type filling area, increase coal mass strength, improve the supporting condition of coal road driving, reduce coal road two and help gas gushing out to digging laneway, in eliminating high prominent coal road driving outburst hazard, solve the problem of coal roadway support difficulty, greatly improve the speed of the prominent Coal roadway driving of soft height.The present invention can make the prominent coal bed gas extraction concentration of soft height improve 10 ~ 15%, and pre-pumping rate improves 25%, and every hole coal output reaches more than 3 tons; Take out in advance the drilling hole amount needing and reduce 20% ~ 30%, take out in advance the time decreased 20% needing; There is fabulous promotional value.
Brief description of the drawings
Fig. 1 is the prominent coal seam speedy drivage structural representation of the soft height of the present invention;
Fig. 2 is the A-A generalized section of Fig. 1;
In figure: 1-coal seam, 2-heading, 3-Di Chou lane, 4-wears a layer slot hole, and the outer command range of outline line is helped in 5-network type filling area on H1-tunnel, help the outer command range of outline line, α-seam inclination under H2-tunnel.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, anti-reflection and the speedy drivage method of layer slot release is worn in the prominent coal seam of soft height of the present invention, first according to looking into geological information parameter: coal seam thickness, seam inclination α, bearing, gas parameter, hydrologic regime and other have the parameter of requirement in construction, formulate detailed embodiment.Carry out pre-implementation preparatory work, consider to process the hazards such as crack, tomography, water.In 1 floor strata of coal seam, move towards cloth bottom set along work plane and take out lane 3, test the radius of influence of determining slot hole by slot; Complete in Hou Dichou lane and arrange a drill site every 6 ~ 8m, 5 ~ 7 of each drill site layouts are worn a layer slot hole 4, and slot hole is linear distribution in coal seam, and whole pitch of holes is 6 ~ 8m.According to the radius of influence in seam inclination α and slot hole, determine the number in each drill site slot hole, on the tunnel of the seam inclination α of its medium dip, high-dipping between 25o to 90o, help outline line to control distance H 1 outward and be at least 20m, under tunnel, help outline line to control distance H 2 outward and be at least 10m, on the tunnel of the seam inclination α of gentle dip, nearly level between 0o to 25o, help outline line to control outward to help outline line to control distance H 2 outward under distance H 1 and tunnel to be at least 15m.If coal seam is gentle dip or flat seam, the wide 4m of heading 2, the slot hole radius of influence is 3.7m, needing the distance of controlling is 34m, arrange that wearing a layer slot hole 4 for 5 can control 37m, command range is greater than 34m, therefore arranges that wearing layer slot hole 4 for 5 gets final product (in heading 2, arranging 1,2 of the each layouts of its upper and lower side); If coal seam is for tilting or half-edge coal seam, the wide 4m of heading 2, the slot hole radius of influence is 3.3m, needing the distance of controlling is 34m, arrange that wearing a layer slot hole 4 for 6 can control 39.6m, command range is greater than 34m, therefore arranges that wearing layer slot hole 4 for 6 can (arrange 1 in heading 2, on it, side arranges 3, and lower side arranges 2).In each drill site in Cong Dichou lane 3, wear a layer slot hole 4 to coal seam 1 direction construction, until through coal seam 1, to carrying out high-pressure hydraulic slot in coal seam 1, implement afterwards gas pumping, before the 2 digging times of heading 30 ~ 50 days, stop gas pumping to wearing a layer slot hole 4 near a row of pre-pick heading 2 both sides, position, wear in layer slot hole 4 pressure injection filler successively by grouting pump to a row who stops gas pumping, coal body to pre-pick heading both sides is reinforced, other not filling wear a layer slot hole 4 and continue mash gas extraction, after filler solidifies, form network type filling area 5 in heading 2 both sides, as shown in Figure 2, network type filling area 5 can increase coal mass strength, improving stress in coal bed distributes, stop the gas in 5 outsides, network type filling area to be gushed out to the pre-pick of heading 2 position simultaneously.Before the heading digging time 5 ~ 7 days, gas pumping effect is tested, after reaching " control coal and Gas Outburst regulation " and requiring, tunnel according to a conventional method heading 2 in the 2 digging times of heading, now coal body is reinforced apart from exceeding 50m.In driving heading 2 processes, continue to wear in layer slot hole 4 pressure injection filler successively near a row of pre-pick heading 2 both sides, position, two rows that ensure filling successively wear layer 4 position, slot hole and answer advance development head to be not less than 50m.
Claims (1)
1. the anti-reflection and speedy drivage method of layer slot release is worn in the prominent coal seam of a soft height, be included in and move towards cloth bottom set along work plane in the floor strata of coal seam (1) and take out lane (3), in Di Chou lane (3), arrange drill site, in each drill site in Cong Dichou lane (3), to coal seam, a layer slot hole (4) worn in the construction of (1) direction, until through coal seam (1), to carrying out high-pressure hydraulic slot in coal seam (1), implement afterwards gas pumping; Characterized by further comprising following steps:
A, multiple drill sites that arrangement pitch is 6 ~ 8m in described Di Chou lane (3), each drill site is arranged layer slot hole (4) of wearing of 5 ~ 7 linear distributions in coal seam (1), wearing layer whole pitch of holes in slot hole (4) is 6 ~ 8m; Described each drill site is worn layer number in slot hole (4) according to seam inclination α and is worn layer radius of influence in slot hole (4) and determine; On the tunnel of the seam inclination α of inclination, high-dipping between 25o to 90o, helping outline line to control distance H 1 is outward at least 20m, helps outline line to control distance H 2 outward and be at least 10m under tunnel; On the tunnel of the seam inclination α of gentle dip, nearly level between 0o to 25o, help outline line to control outward to help outline line to control distance H 2 outward under distance H 1 and tunnel to be at least 15m;
B, in heading (2) the digging time first 30 ~ 50 days, stop gas pumping to wearing a layer slot hole (4) near a row of pre-pick heading (2) both sides, position, wear in layer slot hole (4) pressure injection filler successively by grouting pump to a row who stops gas pumping, the coal body of pre-pick heading (2) both sides is reinforced;
Gas pumping is continued in layer slot hole (4) of wearing of c, not filling;
D, in heading (2) the digging time first 5 ~ 7 days, test to gas pumping effect, reaches after " control coal and Gas Outburst regulation " requirement, can tunnel according to a conventional method heading (2) in heading (2) the digging time; The coal body of heading (2) both sides is reinforced distance need exceed 50m;
E, in driving heading (2) process, continue to wear in layer slot hole (4) pressure injection filler successively near a row of pre-pick heading (2) both sides, position, two rows that ensure filling successively wear a layer position, slot hole (4) and answer advance development head to be not less than 50m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210437230.5A CN102900460B (en) | 2012-11-06 | 2012-11-06 | Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam |
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| CN201210437230.5A CN102900460B (en) | 2012-11-06 | 2012-11-06 | Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam |
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| CN102900460A CN102900460A (en) | 2013-01-30 |
| CN102900460B true CN102900460B (en) | 2014-10-29 |
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| CN114607338B (en) * | 2022-03-21 | 2023-08-18 | 煤炭科学技术研究院有限公司 | Coal mine underground coal rock gas prevention and control composite dynamic disaster method and device |
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