CN110118085A - A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face - Google Patents

A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face Download PDF

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Publication number
CN110118085A
CN110118085A CN201910313145.XA CN201910313145A CN110118085A CN 110118085 A CN110118085 A CN 110118085A CN 201910313145 A CN201910313145 A CN 201910313145A CN 110118085 A CN110118085 A CN 110118085A
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CN
China
Prior art keywords
working
tunneling
tunnel
lane
advanced
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910313145.XA
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Chinese (zh)
Inventor
张吉雄
张建国
陈星明
张衡
张琪
王佳奇
郭宇鸣
张强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
Pingdingshan Tianan Coal Mining Co Ltd
China Pingmei Shenma Energy and Chemical Group Co Ltd
Original Assignee
China University of Mining and Technology CUMT
Pingdingshan Tianan Coal Mining Co Ltd
China Pingmei Shenma Energy and Chemical Group Co Ltd
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Application filed by China University of Mining and Technology CUMT, Pingdingshan Tianan Coal Mining Co Ltd, China Pingmei Shenma Energy and Chemical Group Co Ltd filed Critical China University of Mining and Technology CUMT
Priority to CN201910313145.XA priority Critical patent/CN110118085A/en
Publication of CN110118085A publication Critical patent/CN110118085A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/003Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/01Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level

Abstract

A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face, including necessity assessment is carried out to ahead work face secondary tunneling first;Secondly side expanded to ahead work face secondary tunneling, undercuted;Finally to ahead work face secondary tunneling supporting reinforcement;Deformation behaviour based on tunnel under high working face large mining depth conditions of compound roof, determine the necessity of secondary tunneling, propose the roadway repair method of complete advanced secondary tunneling, solve the problems, such as the advanced stress influence section roadway deformation disaster supporting of mine working face, the ventilation and back production efficiency in two lane of working face are significantly improved, is the safe and efficient production of working face.

Description

A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face
Technical field
The present invention relates to coal mine field of mining, and in particular to a kind of compound two lane of top working face advanced two of large mining depth high working face The lane Ci Cheng method.
Background technique
It is growing as coal in China is production-scale, most of east coal mine mining level constantly extends, and opens It is more and more significant on influence caused by mine back production to adopt depth;And with the continuous maturation of high working face technology, in order to guarantee The high recovery ratio of coal resources, many high seam working faces all use full-seam mining technique to carry out exploitation of coal resources;But Working face extraction is carried out under this large mining depth high working face environment, ahead work face bearing stress can be to the very strong shadow of stope drift active workings Ring, especially under conditions of compound roof, ahead work face regional roadway deformation acutely, seriously affect tunnel normal transport, While ventilation, pedestrian's function, the security risks such as roof fall, coal petrography protrusion are also created.So currently, needing a set of for this Tunnel advance support stress influence area deforms the roadway repair means of violent problem under high working face large mining depth conditions of compound roof.
Summary of the invention
For above-mentioned technical deficiency, the object of the present invention is to provide a kind of compound top working faces of large mining depth high working face Two lanes advanced secondary tunneling methods, tunnel advance support stress under effective solution high working face large mining depth conditions of compound roof The problem of influence area deformation acutely needs roadway repair.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
The present invention provides a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face, including following step It is rapid:
(1) necessity assessment is carried out to ahead work face secondary tunneling;
(2) it undercuts to ahead work face secondary tunneling, expand side;
(3) to ahead work face secondary tunneling supporting reinforcement.
Preferably, the method for necessity assessment being carried out to ahead work face secondary tunneling in step 1) are as follows: measurement working face Span length in front of two lane advance positions, that is, working face within the scope of 100m, compares with the width in former tunnel, if tunnel is received Shrinkage is more than or equal to 50%, then needs to carry out tunnel that expansion side, undercut processing, progress secondary tunneling;If tunnel shrinking percentage is less than 50%, then its due function can be played by illustrating tunnel still, not need secondary tunneling.
Preferably, the tunnel shrinking percentage is that tunnel shifts near distance and the width when molding for the first time of former tunnel i.e. tunnel Ratio.
Preferably, expand the method for side in step 2) are as follows: break process is carried out to the lane side of deformation, to top along roof Construction, bottom guarantee is smooth, expands 30%~50% that side depth is former span length.
Preferably, the method to undercut in step 2) are as follows: pucking tunnel is crushed and smooth processing, and will caused by Spoil transports, and the maximum depth that undercuts is the 50% of former laneway midline height.
Preferably, in step 3) supporting reinforcement method are as follows: to new molding tunnel using anchor net add the method for anchor cable into Row reinforcing cooperates U-shaped joist (3) and steel fragrant plant net (4) combined supporting, together using high-strength anchor cable (2) and high strength anchor bar (1) When the relatively former drift support type of array pitch between high-strength anchor cable (2) and high strength anchor bar (1) is reduced, support density is increased To 120% or more before, to enhance supporting intensity.
The beneficial effects of the present invention are: the deformation behaviour based on tunnel under high working face large mining depth conditions of compound roof, really The necessity for determining secondary tunneling proposes the roadway repair method of complete advanced secondary tunneling, efficiently solves mine work The problem of advanced stress influence section roadway deformation disaster supporting in face, the ventilation and back production efficiency in two lane of working face are significantly improved, It is the safe and efficient production of working face.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.
Fig. 1 is tunnel cross-section diagram after the two advanced secondary tunneling in lane of high working face large mining depth compound roof working face of the invention.
Fig. 2 is that back is high-strength after the two advanced secondary tunneling in lane of high working face large mining depth compound roof working face of the invention Array pitch schematic diagram between anchor pole and high-strength anchor cable.
Fig. 3 is drift section before and after the deformation of high working face large mining depth compound roof roadway workface and secondary tunneling of the invention Contrast schematic diagram.
Fig. 4 is that the embodiment of the present invention expands side embodiment schematic diagram.
Description of symbols:
The high-strength anchor cable of 1- high strength anchor bar, 2-, 3-U type joist, 4- steel fragrant plant net, the common anchor cable of 5-, 6- equal strength anchor rod, 7- original lane Tunnel, 11- elevating conveyor after side, the tunnel 8-, 9- original tunnel, 10- are repaired.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1 to Figure 3, a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face, including Following steps:
Step 1: necessity assessment is carried out to ahead work face secondary tunneling;
Referring to attached drawing 3;Former tunnel 9 crustal stress effect under occur it is severely deformed, pass through measurement the advanced position in two lane of working face The width for setting tunnel 8 is compared with the width in former tunnel 9, if (tunnel 8 shifts near distance and former 9 width of tunnel to tunnel shrinking percentage Ratio) be more than or equal to 50%, then need to carry out tunnel 8 that expansion side, undercut processing, progress secondary tunneling;If tunnel shrinking percentage Less than 50%, then its due function can be played by illustrating tunnel 8 still, not need secondary tunneling;If tunnel 8 is after measuring, tunnel Shrinking percentage is greater than 50% and needs to carry out secondary tunneling reparation.
Step 2: the preparation before formulating tunnel secondary tunneling.
It needs to determine for 8 actual conditions of tunnel and expands side position, expand side distance, while carrying out construction site and checking, construct The preparation of material installation.
Step 3: side is expanded in tunnel
The lane side of deformation carries out break process, and top is constructed along roof, and bottom guarantee is smooth, and expanding side depth is former lane The 30%~50% of 9 width of road is expanded side and needs to be cooperated individual prop, articulated roof beam progress frame canopy interim using metal mesh in the process Supporting,
Referring to fig. 4, expand side scheme schematic diagram for embodiment;It is designed with elevating conveyor 11 in general tunnel, in order not to reprinting The equipment of 11 side of machine has an impact, and chooses and expands side plan are as follows: expand side since 11 tail position of elevating conveyor, first to being helped in expansion, Expand side distance 20m;Expand lower side again, expands side distance 80m, it is total to expand side distance 100m.
Step 4: tunnel undercuts
Pucking tunnel is crushed and smooth processing, and generated spoil is transported by reprinting equipment, undercut with Within the scope of 10m on the basis of lowest part head-room, the front and back guarantee that undercuts is vertical with former lane side 7, and Land leveling, transition is gentle, does Net foreign need to take the method auxiliary rock that explosion presplitting is carried out to bottom plate if encountering the hard location of rock.
Step 5: tunnel reinforcement supporting
Referring to attached drawing 1, tunnel 8 undercuts after the completion of expansion side, takes anchor net that high-strength anchor cable 2 is cooperated to carry out in tunnel 10 after reparation Supporting, back use hydraulic anchor cable rig drilling, and tunnel portion, side is drilled using pneumatic ZQS-50/1.8S hand drill Hole, pore-forming carry out supporting using the high-strength anchor cable 2 of 22 × 7500mm of φ and 22 × 2600mm of φ high strength anchor bar 1,
Referring to attached drawing 2, the support density of high strength anchor bar 1 and high-strength anchor cable 2 is adjusted, array pitch is by general in former tunnel 9 between anchor cable 1400 × 1500mm between logical anchor cable 5 becomes 1000 × 1200mm between high-strength anchor cable 2, and bolt interval is strong by waiting before 750 × 750mm between anchor pole 6 becomes 700 × 700mm between high strength anchor bar 1.
It is that cooperation 36U type joist 3 is attached adjacent high-strength anchor cable 2 when the high-strength anchor cable 2 in tunnel 10 is installed after reparation; When high strength anchor bar 1 is installed, it is laid with 900mm × 2600mm steel basketry net 4, guarantees that a high strength anchor bar 1 has to pass through adjacent two pieces Steel basketry net 4.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (5)

1. a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face, it is characterised in that: including following step It is rapid:
1) necessity assessment is carried out to ahead work face secondary tunneling;
2) side expanded to ahead work face secondary tunneling, undercuted;
3) to ahead work face secondary tunneling supporting reinforcement.
2. a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face as described in claim 1, special Sign is: the method for carrying out necessity assessment to ahead work face secondary tunneling in step 1) are as follows: measurement two lane of working face is advanced Span length in front of position, that is, working face within the scope of 100m, the width in original tunnel compares when forming for the first time with tunnel, If tunnel shrinking percentage more than or equal to 50%, needs to carry out tunnel, expansion side, undercut processing, carries out secondary tunneling;If tunnel is shunk For rate less than 50%, then its due function can be played by illustrating tunnel still, not need secondary tunneling.
3. a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face as described in claim 1, special Sign is: expanding the method for side in step 2 are as follows: break process is carried out to the lane side of deformation, is constructed to top along roof, bottom Portion's guarantee is smooth, expands 30% ~ 50% that side depth is former span length.
4. a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face as described in claim 1, special Sign is: the method to undercut in step 2 are as follows: is crushed and smooth processing to pucking tunnel, and generated spoil is transported Out, the maximum depth that undercuts is the 50% of former laneway midline height.
5. a kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face as described in claim 1, special Sign is: the method for supporting reinforcement in step 3) are as follows: adds the method for anchor cable to carry out reinforcement using anchor net in new molding tunnel and adds Gu cooperating U-shaped joist (3) and steel fragrant plant net (4) combined supporting, while to high-strength using high-strength anchor cable (2) and high strength anchor bar (1) The relatively former drift support type of array pitch is reduced between anchor cable (2) and high strength anchor bar (1), before support density is increased to 120% or more, enhance supporting intensity.
CN201910313145.XA 2019-04-18 2019-04-18 A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face Pending CN110118085A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648775A (en) * 2020-05-20 2020-09-11 中铁四院集团岩土工程有限责任公司 Method and tool for renovating transverse deformation of shield tunnel
CN111691886A (en) * 2020-06-23 2020-09-22 国家能源集团宁夏煤业有限责任公司 Construction method for opening cutting hole by fully-mechanized coal mining machine in fully-mechanized coal mining face

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CN102337904A (en) * 2011-09-09 2012-02-01 贾民 Method for retaining gob-side tunnel
CN103016057A (en) * 2012-12-20 2013-04-03 大同煤矿集团有限责任公司 Prevention method for dynamic pressure area of working face
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CN102337904A (en) * 2011-09-09 2012-02-01 贾民 Method for retaining gob-side tunnel
CN103016057A (en) * 2012-12-20 2013-04-03 大同煤矿集团有限责任公司 Prevention method for dynamic pressure area of working face
CN105781597A (en) * 2014-12-16 2016-07-20 淮南矿业(集团)有限责任公司 Method for performing anchoring and grouting reinforcement inside deep well soft rock gob-side entry retaining

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648775A (en) * 2020-05-20 2020-09-11 中铁四院集团岩土工程有限责任公司 Method and tool for renovating transverse deformation of shield tunnel
CN111691886A (en) * 2020-06-23 2020-09-22 国家能源集团宁夏煤业有限责任公司 Construction method for opening cutting hole by fully-mechanized coal mining machine in fully-mechanized coal mining face
CN111691886B (en) * 2020-06-23 2021-08-31 国家能源集团宁夏煤业有限责任公司 Construction method for opening cutting hole by fully-mechanized coal mining machine in fully-mechanized coal mining face

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Application publication date: 20190813

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