CN107503778A - The method that gob side entry retaining is realized using grouting cable anchor - Google Patents

The method that gob side entry retaining is realized using grouting cable anchor Download PDF

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Publication number
CN107503778A
CN107503778A CN201710817472.XA CN201710817472A CN107503778A CN 107503778 A CN107503778 A CN 107503778A CN 201710817472 A CN201710817472 A CN 201710817472A CN 107503778 A CN107503778 A CN 107503778A
Authority
CN
China
Prior art keywords
gob
tunnel
anchor
anchor cable
entry retaining
Prior art date
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
CN201710817472.XA
Other languages
Chinese (zh)
Inventor
张若祥
张殿镇
颜磊
张新
刘传明
井立志
杨凯
乔振长
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.)
XINWEN MINING GROUP CO Ltd SUNCUN COAL MINE
XINWEN MINING GROUP CO Ltd
Original Assignee
XINWEN MINING GROUP CO Ltd SUNCUN COAL MINE
XINWEN MINING GROUP CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XINWEN MINING GROUP CO Ltd SUNCUN COAL MINE, XINWEN MINING GROUP CO Ltd filed Critical XINWEN MINING GROUP CO Ltd SUNCUN COAL MINE
Priority to CN201710817472.XA priority Critical patent/CN107503778A/en
Publication of CN107503778A publication Critical patent/CN107503778A/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
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The invention discloses a kind of method that gob side entry retaining is realized using grouting cable anchor, design first need to continue to employ tunnel, isolate goaf, the tunnel integrality be kept, as the transport of next working face, ventilation, pedestrian tunnel.According to design and construction anchor cable eye, installation, anchoring anchor cable sealing of hole.Push to adopt by preceding grouting and reinforcing top plate, make back is cementing to turn into an entirety, prolong gob edge arrangement anchor cable, prolong border after pushing to adopt and set up grillage, point post, the closure of spoil bag etc. in tunnel, realize that top is cut in gob edge lock seaming, above goaf non-support goaf carrys out coping and crushes spontaneous caving, and lane is stayed in realization.The present invention passes through reasonable employment grouting cable anchor slip casting, form the second consolidation to top plate, consolidation effect is obvious, roof rock is stable, and overall mechanical properties show, reduce two and help horizontal stress, tunnel overall deformation is reduced and reaches 70% or so, support cost is reduced, tunnel no longer carries out secondary reparation, reduces later stage work amount.

Description

The method that gob side entry retaining is realized using grouting cable anchor
Technical field
The present invention relates to coal mining, more particularly to edge air gallery technology.
Background technology
Traditional coal mining, it is usually two lanes of the one side arrangement of all, retains between lower work face certain The coal column of width, leave coal column and cause the wasting of resources, and digging is higher.Therefore, start to use gob side entry retaining in the last few years Without coal pillar mining mode, by single lane digging pattern when double lanes are changed into, gob side entry retaining is as next working face Transport, ventilation, pedestrian tunnel.Pack wall is built in use by laying bricks or stones to current gob side entry retaining mostly and paste body filling mode substitutes reserved coal Post, or yield supporting is carried out using shock resistance constant-resistance anchor cable on the top plate of gob side entry retaining.Needed due to building very thick wall by laying bricks or stones A large amount of spoils and ointment material are wanted, and when roof cracking, constant-resistance anchor cable easily fails, and anchor cable only serves suspention and made With, the effect of cementing top plate can not be realized, so current gob side entry retaining generally requires secondary supporting and reinforcement supporting, supporting into This is very high.So further research is needed to edge air gallery technology.
The content of the invention
The purpose of the present invention is based on grouting cable anchor support technology, proposes that a kind of realized using grouting cable anchor is stayed along sky The method in lane.
To reach above-mentioned purpose, the present invention adopts the technical scheme that:
A kind of method that gob side entry retaining is realized using grouting cable anchor, it is characterised in that step is as follows:
The first step, in current coal-face exploitation, continuing to employ for next working face is reserved along goaf design Roadway position, i.e. gob side entry retaining;
Second step, side exploitation, while being constructed four to six row's anchor cable holes along direction of advance on the top plate of reserved gob side entry retaining, often Anchor cable pitch of holes 80-120cm on row, anchor cable hole depth are more than 6 meters, and the anchor cable hole most on side is apart from tunnel boundary line 10cm;
3rd step, side construction anchor cable hole, while installing grouting cable anchor in anchor cable hole, is split after sealing of hole using high-pressure pump to top plate Gap carries out slip casting, and the gap of breaking roof and hole body are enriched, and the top plate of reserved gob side entry retaining is cementing integral;It is wherein mined out That row's anchor cable of area side tunnel boundary line needs to install upper girder steel;
4th step, bolting with wire mesh is carried out to the rib side of gob side entry retaining and top plate, form a multilayer efficient combination arch, i.e., Arch is reinforced in anchor net built-up arch, anchor cable compressional zone built-up arch and slurries diffusion, so as to improve the globality of supporting construction and carrying energy Power;Steel band of model on can also being constructed at the top of tunnel, strengthens roof timbering;
5th step, with the reinforcing of back and the propulsion of working face, top support is cut along goaf side boundary line arrangement Structure, such as set up grillage, get post ready, spoil bag is built a wall measure, when goaf is to press, the breaking roof of non-support collapses naturally Fall, the Strengthening Roof of supporting forms gob side entry retaining together with protolith reinforcing.
The present invention stay lane principle and good effect be:
1st, the present invention compares with original common anchor cable yield supporting, by the slip casting of grouting cable anchor, is blocked using slurries Wall-rock crack, completely cut off air, prevent country rock weathering, and can prevent country rock from being reduced intensity of country rock itself, slip casting by water erosion Rear slurry is cementing integral by the country rock of loose crushing, improves rock mass strength and cohesive force, internal friction angle and modulus of elasticity, from And rock mass strength is improved, make top plate second consolidation, country rock in itself and the part as supporting construction, and forms one with protolith Individual entirety, tunnel is set to keep stable and be not likely to produce destruction.
2nd, coordinate bolting with wire mesh again after slip casting of the present invention, the built-up arch of an effective enlarged in thickness of multilayer can be formed, I.e. arch is reinforced in anchor net built-up arch, anchor pole compressional zone built-up arch and slurries diffusion, so as to expand effective carrying model of supporting construction Enclose, improve the globality and bearing capacity of supporting construction.The vertical load acted on top plate enable after slip casting effectively It is delivered to two to help, by the reinforcing to side, load is delivered to bottom plate by and can;Simultaneously because the increasing of built-up arch thickness, reduces The Load concentration degree acted on bottom plate, base slab stability, mitigate bottom distension phenomenon;Base slab stability contributes to two stabilizations helped, bottom plate And two help to stablize the stabilization that and can maintains top plate.
3rd, it is of the invention and original using shock resistance constant-resistance anchor cable progress yield supporting, working face open-off cut top pressure release gob side entry retaining Technology compare, on the premise of supporting effect is ensured, avoid the generation of the disrumpent feelings phenomenon of anchor cable, effectively discharge country rock accumulation Deformation energy.Grouting cable anchor serves multiple action of the anchor cable in extruding reinforcing, multiple layer combination arch and slip casting etc.;Due to note Starch full anchor, roadway deformation amount is obviously reduced, and controls top plate deep absciss layer, saved for secondary supporting and reinforcement supporting into This.
In a word, edge air gallery technology of the invention, by reasonable employment grouting cable anchor slip casting, formed and the secondary of top plate is added Gu consolidation effect is obvious, roof rock is stable, and overall mechanical properties show, reduce two and help horizontal stress, tunnel is integrally become Shape, which reduces, reaches 70% or so, reduces support cost, tunnel no longer carries out secondary reparation, reduces later stage work amount.
Brief description of the drawings
Fig. 1 is the gob side entry retaining sectional drawing of the embodiment of the present invention;
The gob side entry retaining plan of Fig. 2 embodiment of the present invention.
Marginal data, 1- goafs, 2- girder steels, 3-M steel band of model, 4- gob side entry retainings, 5- ribs, 6- grouting cable anchors, 7- anchors Net supporting, 8- cut topmast support structure, 9- top plates, 10- coal-faces.
Embodiment
As shown in Fig. 1 Fig. 2, a kind of technical method that gob side entry retaining is realized using grouting cable anchor, step is:
The first step, when current coal-face 10 is exploited, in the side of goaf 1, design reserves next working face Continue to employ roadway position, i.e. gob side entry retaining 4;
Second step, side exploitation, while constructed four to six row's anchor cable holes along direction of advance on the top plate 9 of reserved gob side entry retaining 4, The often anchor cable pitch of holes 80-120cm on row, anchor cable hole depth are more than 6 meters, and the anchor cable hole most on side is apart from tunnel boundary line 10cm;
3rd step, side construction anchor cable hole, while grouting cable anchor 6 is installed in anchor cable hole, using high-pressure pump to top plate after sealing of hole Crack carries out slip casting, and the gap of breaking roof and hole body are enriched, and the top plate of reserved gob side entry retaining 4 is cementing integral;Wherein That row's anchor cable of the side tunnel boundary line of goaf 1 needs to install upper girder steel 2;
4th step, the side of rib 5 and top plate 9 to gob side entry retaining 4 carry out bolting with wire mesh 7, form a multilayer efficient combination Arch is reinforced in arch, i.e. anchor net built-up arch, anchor cable compressional zone built-up arch and slurries diffusion, so as to improve the globality of supporting construction and hold Loading capability;Can also construct M steel band of model 3 at the top of tunnel.
5th step, with the reinforcing of back 9 and the propulsion of working face, topmast is cut along the side boundary line of goaf 1 arrangement Support structure 8, such as set up grillage, get post ready, spoil bag is built a wall measure, when goaf 1 is to press, the breaking roof of non-support from So it is caving, the Strengthening Roof 9 of supporting forms gob side entry retaining 4 together with protolith reinforcing.

Claims (1)

  1. A kind of 1. method that gob side entry retaining is realized using grouting cable anchor, it is characterised in that step is as follows:
    The first step, in current coal-face exploitation, continue to employ tunnel along what goaf design reserved next working face Position, i.e. gob side entry retaining;
    Second step, side exploitation, while often being arranged along direction of advance four to six row's anchor cable holes of construction on the top plate of reserved gob side entry retaining Anchor cable pitch of holes 80-120cm, anchor cable hole depth be more than 6 meters, the anchor cable hole most on side is apart from tunnel boundary line 10cm;
    3rd step, side construction anchor cable hole, while installing grouting cable anchor in anchor cable hole, is entered after sealing of hole using high-pressure pump to roof fracture Row slip casting, the gap of breaking roof and hole body are enriched, the top plate of reserved gob side entry retaining is cementing integral;Wherein goaf side That row's anchor cable of tunnel boundary line needs to install upper girder steel;
    4th step, bolting with wire mesh is carried out to the rib side of gob side entry retaining and top plate, form a multilayer efficient combination arch, i.e. anchor net Arch is reinforced in built-up arch, anchor cable compressional zone built-up arch and slurries diffusion, so as to improve the globality of supporting construction and bearing capacity;Also Steel band of model on being constructed at the top of tunnel, strengthens roof timbering;
    5th step, with the reinforcing of back and the propulsion of working face, topmast support structure is cut along goaf side boundary line arrangement, Such as set up grillage, get post ready, spoil bag is built a wall measure, when goaf is to press, the breaking roof spontaneous caving of non-support, branch The Strengthening Roof protected forms gob side entry retaining together with protolith reinforcing.
CN201710817472.XA 2017-09-12 2017-09-12 The method that gob side entry retaining is realized using grouting cable anchor Pending CN107503778A (en)

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CN201710817472.XA CN107503778A (en) 2017-09-12 2017-09-12 The method that gob side entry retaining is realized using grouting cable anchor

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Application Number Priority Date Filing Date Title
CN201710817472.XA CN107503778A (en) 2017-09-12 2017-09-12 The method that gob side entry retaining is realized using grouting cable anchor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109779663A (en) * 2019-02-01 2019-05-21 王�琦 Gob side entry retaining multi-zone cascade-control method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101503959A (en) * 2008-11-26 2009-08-12 枣庄矿业(集团)有限责任公司滨湖煤矿 Gob-side entry retaining support method
CN104358572A (en) * 2014-09-11 2015-02-18 四川达竹煤电(集团)有限责任公司铁山南煤矿 Non-pillar mining technology by spontaneous caving filling roadway at large inclined angle steeply inclined seam
CN104533486A (en) * 2015-01-30 2015-04-22 安徽理工大学 Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable
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
JP2016216975A (en) * 2015-05-19 2016-12-22 鹿島建設株式会社 Installation method of earth anchor
CN106677804A (en) * 2017-02-23 2017-05-17 山东建筑大学 Gob-side entry retaining roadside support system and construction method thereof
CN206376890U (en) * 2016-12-27 2017-08-04 山西潞安环保能源开发股份有限公司常村煤矿 A kind of grouting cable anchor structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101503959A (en) * 2008-11-26 2009-08-12 枣庄矿业(集团)有限责任公司滨湖煤矿 Gob-side entry retaining support method
CN104358572A (en) * 2014-09-11 2015-02-18 四川达竹煤电(集团)有限责任公司铁山南煤矿 Non-pillar mining technology by spontaneous caving filling roadway at large inclined angle steeply inclined seam
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
CN104533486A (en) * 2015-01-30 2015-04-22 安徽理工大学 Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable
JP2016216975A (en) * 2015-05-19 2016-12-22 鹿島建設株式会社 Installation method of earth anchor
CN206376890U (en) * 2016-12-27 2017-08-04 山西潞安环保能源开发股份有限公司常村煤矿 A kind of grouting cable anchor structure
CN106677804A (en) * 2017-02-23 2017-05-17 山东建筑大学 Gob-side entry retaining roadside support system and construction method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张生华等: "沿空留巷锚杆支护技术", 《矿山压力与顶板管理》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109779663A (en) * 2019-02-01 2019-05-21 王�琦 Gob side entry retaining multi-zone cascade-control method

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Application publication date: 20171222