CN107956481A - A kind of suspension device for superelevation tunnel gob side entry retaining - Google Patents
A kind of suspension device for superelevation tunnel gob side entry retaining Download PDFInfo
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- CN107956481A CN107956481A CN201711297735.5A CN201711297735A CN107956481A CN 107956481 A CN107956481 A CN 107956481A CN 201711297735 A CN201711297735 A CN 201711297735A CN 107956481 A CN107956481 A CN 107956481A
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- tunnel
- coal wall
- superelevation
- entry retaining
- suspension device
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- 239000000725 suspension Substances 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 230000002787 reinforcement Effects 0.000 claims abstract description 35
- 230000008093 supporting effect Effects 0.000 claims abstract description 32
- 229910003460 diamond Inorganic materials 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims 2
- 239000011152 fibreglass Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of suspension device for superelevation tunnel gob side entry retaining, superelevation tunnel includes tunnel and the preceding tunnel that undercuts, coal wall bears the side that side is arranged on tunnel and the preceding tunnel that undercuts, goaf, working face and coal wall just side are successively set on the opposite side in tunnel and the preceding tunnel that undercuts, concrete filled steel tube pillar is arranged at intervals in tunnel and folded stent is used for supporting, the stull steel column for being used for resisting tunnel side pressure is set in tunnel on the concrete filled steel tube pillar at goaf, and back sets the reinforcement anchor cable for advanced pre-reinforcement.Supporting of the present invention is reliable, easy to operate, cost-effective, improves coal recovery rate；Colliery economic benefit is improved, the application of superelevation gob side entry retaining can reduce the driving amount in tunnel, alleviate mine and continue nervous problem.
Description
Technical field
The invention belongs to mining engineering and technology field, and in particular to a kind of supporting for superelevation tunnel gob side entry retaining fills
Put.
Background technology
With developing rapidly for production technique and support system, gob side entry retaining is widely used, and is also achieved good
Good application effect.Gob side entry retaining application at present is concentrated mainly in the tunnel of below 4m, and more than 4m is also not directed to.
Chinese preservation has substantial amounts of super high seam, has high working face and comprehensive mechanization to put using more recovery method now
Top coal exploits two major classes.Since head-room and back production are highly consistent in large cutting height workface, seldom using edge air gallery technology.
, can only be using the method for " rock top is tunneled, along bottom back production ", in back production and many times coal seam is softer in caving Mining Technology
During need " secondary driving ", influence to keep the safety in production.
Existing edge air gallery technology is primarily present problems with and deficiency：
1st, using below 4m tunnels are mainly limited to, seldom it is related to for more than 4m tunnels；
2nd, when stope drift active workings are highly more than 4m, headwork amount is big, and supporting is difficult, and driving speed is slow；
3rd, now most commonly used is double lane drivings, and protection pillar can be left between tunnel and tunnel, causes the wasting of resources；
4th, back production of the protection pillar left after back production to the later stage adversely affects, and easily forms stress concentration, covers at the same time
Crack cannot close and cause swallet to increase in rock.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing one kind is used for superelevation
The suspension device of tunnel gob side entry retaining, more than 4m is brought up to by gob side entry retaining head-room, and that has widened gob side entry retaining applies model
Enclose, reduce super high seam tunnelling amount, improve resource recovery.
The present invention uses following technical scheme：
A kind of suspension device for superelevation tunnel gob side entry retaining, superelevation tunnel includes tunnel and the preceding tunnel that undercuts, coal wall
Negative side is arranged on the side in tunnel and the preceding tunnel that undercuts, and goaf, working face and coal wall just side are successively set on tunnel and undercut
The opposite side in preceding tunnel, is arranged at intervals concrete filled steel tube pillar in tunnel and folding rack is used for supporting, be located in tunnel
The stull steel column for being used for resisting tunnel side pressure is set on the concrete filled steel tube pillar at goaf, and back, which is set, to be used in advance
The reinforcement anchor cable of pre-reinforcement.
Specifically, reinforcement anchor cable is arranged on the side that back leans on coal wall just helping, vertical working top plate is set, reinforcement anchor
It is 300~800mm that rope is just helping distance with coal wall, and reinforcement anchor cable is arranged with steel band.
Further, the diameter of reinforcement anchor cableIt is 6~20m for 15.24~21.6mm, length L, single arrangement, spacing is
600~1200mm.
Specifically, the spacing of concrete filled steel tube pillar and folding rack is 0.8~1.6m, the column at folding rack both ends and
Concrete filled steel tube pillar is located on the same line.
Further, concrete filled steel tube pillar is just helping side and coal wall to bear side side and respectively set up a row in coal wall, is born apart from coal wall
Side side is 100~500mm, and it is 300~600mm that side is just being helped apart from coal wall.
Just helping side to be provided with presplit blasting hole specifically, being close to coal wall in back, explosion first advance away from
From for 20~50m.
Specifically, tunnel be located at working face to the tunnel between the preceding tunnel that undercuts undercut height be 4~6m, coal wall bears side
Side, which sets anchor cable and consolidates anchor pole certainly, to be used to reinforce, and coal wall is just helping side to set anchor cable, consolidate anchor pole certainly and glass fibre reinforced plastics rockbolts are used for
Supporting.
Specifically, tunnel sets the diamond shape mesh sheet for being used for keeping off cash along goaf side.
Further, rhombus net on piece is injected with plugging material.
Specifically, drift section size is a length of 3.0~4.8m before undercuting, width is 2.5~4.0m, at the preceding tunnel that undercuts
Coal wall is just helped, coal wall bears side and back uses anchor cable and consolidates anchor pole certainly and is connected to reinforce.
Compared with prior art, the present invention at least has the advantages that：
The present invention be used for superelevation tunnel gob-side entry retaining support device by tunnel and before undercuting tunnel both sides coal wall just
Side, coal wall are born and set supporting respectively on side and back, and concrete filled steel tube pillar is arranged at intervals in tunnel and folds branch
Frame is used for supporting, sets high intensity stull steel column to be used to resist tunnel side on the concrete filled steel tube pillar in the tunnel of goaf side
Pressure, sets reinforcement anchor cable to be used for advanced pre-reinforcement, concrete filled steel tube pillar is applied to coal mine gob-side entry retaining branch in back
In shield, original high intensity pier stud support pattern is changed, concrete filled steel tube pillar can be with the premise of supporting intensity is met
Cost is substantially reduced, while the head-room of gob side entry retaining can be improved, adds the application range of gob side entry retaining.
Further, reinforcement anchor cable can strengthen goaf side back branch under intrinsic roadway support intensity
Shield, steel band have rock integrity and stability action between two anchor cables of increase, reinforcement anchor cable and the common supporting of steel band, ensure
Goaf side back its integrality and stability after top explosion is cut.
Further, tunnel undercuts highly to 4~6m, coal wall close to working face side to the tunnel between the preceding tunnel that undercuts
Negative side side, which sets anchor cable and consolidates anchor pole certainly, to be used to reinforce, and coal wall is just helping side to set glass fibre reinforced plastics rockbolts to be used for supporting, can make up
Gob side entry retaining head-room can only be promoted to 4~6m by present gob side entry retaining height in deficiency used below 4m, and increasing should
Use field.
Further, the spacing of concrete filled steel tube pillar and folding rack is 0.8~1.6m, the column at folding rack both ends
It is located at concrete filled steel tube pillar on the same line and is provided enough for pedestrian, haul during this working face and lower working face extraction
Space, can also reduce flowing resistance, while be easy to standardized work, after the use of tunnel in support apparatus folding rack and
High intensity stull can be with recycling.
Further, concrete filled steel tube pillar is just helping side and coal wall to bear side side and respectively set up a row in coal wall, is born apart from coal wall
Side side is 100~500mm, leaves certain working space, and it is 300~600mm that side is just being helped apart from coal wall, is concrete filled steel tube branch
Pylon is set and coal mining machine operation leaves certain space, while leaves certain change for goaf spoil inbreak after working face extraction
Shape space, reduces the lateral force of steel pipe concrete pillar.
Further, just helping side to hang diamond shape mesh sheet in goaf along coal wall to play the role of keeping off cash, and in diamond shape mesh sheet
Upper injection plugging material, prevent from leaking out pours in tunnel with toxic and harmful gas.
In conclusion supporting of the present invention is reliable, and it is easy to operate, it is cost-effective, improve coal recovery rate；Improve colliery economy
Benefit, the application of superelevation gob side entry retaining can reduce the driving amount in tunnel, alleviate mine and continue nervous problem.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is A-A ' profiles of the present invention；
Fig. 3 is B-B ' profiles of the present invention；
Fig. 4 is C-C ' profiles of the present invention.
Wherein：1. tunnel；2. working face；3. goaf；4. coal wall is just helped；5. coal wall bears side；6. anchor cable；7. consolidate anchor certainly
Bar；8. presplit blasting hole；9. steel pipe concrete bracket；10. folding rack；11. stull steel column；12. reinforcement anchor cable；13. steel band；
14. diamond shape mesh sheet；15. glass fibre reinforced plastics rockbolts；16. plugging material；17. undercut preceding tunnel；18. back.
Embodiment
In the description of the present invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " side ", " one end ", " one side "
Relation is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, without referring to
Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot manage
Solve as limitation of the present invention.In the description of the present invention, unless otherwise indicated, " multiple " be meant that two or two with
On.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Referring to Fig. 1, a kind of suspension device for superelevation tunnel gob side entry retaining of the invention, coal wall bear side 5 and are arranged on lane
Road 1 and the side in the preceding tunnel 17 that undercuts, goaf 3, working face 2 and coal wall just side 4 are successively set on tunnel 1 and the preceding tunnel that undercuts
17 opposite side, suspension device include concrete filled steel tube pillar 9, folding rack 10, stull steel column 11 and reinforcement anchor cable 12, tunnel
1 sets folding rack 10 and concrete filled steel tube pillar 9 to carry out supporting, the concrete filled steel tube pillar in 2 rear tunnel 1 of working face
The stull steel column 11 of high intensity is set up on 9, for resisting tunnel side pressure, the preceding tunnel 17 of undercuting is set from consolidating anchor pole 7 and common
Anchor cable 6 is connected to supporting, and back 18 sets reinforcement anchor cable 12 to be used for advanced pre-reinforcement, and coal wall is just helping 4, coal wall to bear side 5
Consolidate anchor pole 7 and common anchor cable 6 using oneself with back 18 and carry out supporting according to designed parameter.
(1), roadway support before undercuting
The measure of undercuting is taken in the preceding tunnel 17 that undercuts, and highly increases to 4~6m, and the sections that newly undercut of side 5 are born to coal wall and are used from consolidating
Gu anchor pole 7 and common anchor cable 6 carry out supporting according to designed parameter, the 4 new sections that undercut just are being helped to use glass fibre reinforced plastics rockbolts 7 to coal wall
Supporting is carried out according to designed parameter.
Preceding 17 section of tunnel that undercuts is (3.0~4.8) m × (2.5~4.0) m, and the coal wall in the preceding tunnel 17 that undercuts just helps 4, coal
Wall bears side 5 and back 18 using common anchor cable 6 and consolidates anchor pole 7 certainly and reinforced, and common anchor cable 6 and consolidates anchor pole 7 certainly
Parameter be colliery commonly used equipment parameter, coal wall just helping 4 and coal wall bear 5 supportings of side between array pitch according to geology bar of digging up mine accordingly
Part is chosen；
(2), the advanced pre-reinforcement of back
For ease of construction, before undercuting in tunnel 1, advanced pre-reinforcement is carried out using reinforcement anchor cable 12 to back 18, will
Back 18 carries out reinforcement supporting, reinforcement anchor cable 12 and coal wall just side 4 by coal wall just 4 sides of side with steel band 13 and reinforcement anchor cable 12
Distance be 300~800mm, vertical working top plate 18 is arranged, the diameter of reinforcement anchor cable 12For 15.24~21.6mm, length L
For 6~20m, single arrangement, spacing is 600~1200mm, and steel band 13 is added under reinforcement anchor cable 12；
(3), back Advance presplitting explosion
For ease of construction, before tunnel 1 undercuts, it is close to coal wall just 4 sides of side by designed blasting parameter in back 18
Presplit blasting hole 8 is beaten, carrying out presplitting to back 18 cuts top explosion, 20~50m of explosion first advance；
(4), tunnel undercuts and supporting
First advance 2 undercuts the preceding tunnel 17 that undercuts, and tunnel 1 is undercuted to 4~6m height, to new tunnel 1
Coal wall bears the common anchor cable 6 of use of side 5 and consolidates anchor pole 7 certainly and reinforced, and common anchor cable 6 and the parameter for consolidating anchor pole 7 certainly are coal
Ore deposit commonly used equipment parameter, coal wall just helping 4 and coal wall bear side 5 supportings between array pitch according to accordingly dig up mine geological conditions selected
Take；Coal wall just side 4 carries out supporting using glass fibre reinforced plastics rockbolts 15, glass fibre reinforced plastics rockbolts parameter and an array pitch according to mining geological conditions into
Row is chosen；
(5), folding rack and concrete filled steel tube supporting
Tunnel 1 after undercuting is carried out setting up concrete filled steel tube pillar 9 and folding rack 10 carries out supporting, spacing is
0.8~1.6m, when erection, make the column of folding rack 10 and concrete filled steel tube pillar 9 keep on one wire.Concrete filled steel tube
Pillar is just helping 4 sides in coal wall and coal wall bears 5 sides of side and respectively sets up a row, and it is 100~500mm to bear 5 lateral extents of side apart from coal wall, distance
Coal wall just 4 lateral extents of side are 300~600mm；
(6), goaf is closed
After working face 2 pushes through, 4 sides are just being helped to play gear cash along the goaf 3 to be formed extension diamond shape mesh sheet 14 is caving in coal wall
Effect, then in diamond shape mesh sheet 14 spray plugging material 16 2 rear goaf 3 of working face is closed, prevent from leaking out and
Toxic and harmful gas pours in tunnel 1.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
Applying the component of example can be arranged and be designed by a variety of configurations.Therefore, the present invention to providing in the accompanying drawings below
The detailed description of embodiment be not intended to limit the scope of claimed invention, but be merely representative of the selected of the present invention
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, belongs to the scope of protection of the invention.
This technology obtains good application effect at Hancheng mining company scene.The tailentry road undercuts preceding tunnel
Section is 4.5m × 3.0m, and coal wall is just helped, coal wall bears side and back consolidates using common anchor cable and certainly the reinforcing of anchor pole row；
Common anchor cable diameterFor 21.6mm, length L is 6.0m, consolidates bolt diameter certainlyFor 32mm, length L is 3.5m.
Two help the common anchor cable of supporting between array pitch be 1.0m × 1.6m, it is 700mm × 800mm to consolidate bolt interval certainly；
Array pitch is 1.0m × 2.1m between the common anchor cable of back supporting, consolidate certainly bolt interval for 700mm ×
800mm。
Before undercuting in tunnel, advanced pre-reinforcement is carried out using reinforcement anchor cable to back, reinforcement anchor cable is just being helped with coal wall
Distance is 500mm, vertical top plate arrangement, reinforcement anchor cable diameterFor 21.6mm, length L is 10.0m, single arrangement, and spacing is
800mm, adds 4.5m long steel bands under reinforcement anchor cable；Being close to coal wall in back is just helping side to beat presplit blasting hole, and tunnel is pushed up
Plate carries out presplit blasting, and the distance of explosion first advance 2 is 20~50m.
First advance undercuts tunnel, and tunnel is undercuted to 6m high, and tunnel coal wall bears side supporting parameter after undercuting
Consistent with bearing side supporting parameter before, coal wall is just helped to carry out supporting, glass fibre reinforced plastics rockbolts diameter using glass fibre reinforced plastics rockboltsFor 20mm,
Length L is 2.0m, and an array pitch is 700mm × 800mm.
Tunnel after undercuting is carried out setting up concrete filled steel tube pillar and folding rack carries out supporting, spacing is 1.2m,
The column and concrete filled steel tube pillar for making folding rack during erection are kept on one wire.Concrete filled steel tube pillar is just being helped in coal wall
Side and coal wall bear side side and respectively set up a row, bear side side 300mm apart from coal wall, side 500mm is just being helped apart from coal wall；Working face push through with
Afterwards, tunnel coal wall just helps side to be caving to form goaf, is just helping side goaf to hang diamond shape mesh sheet along coal wall and is playing the role of keeping off cash,
And plugging material is sprayed in rhombus net on piece, prevent from leaking out pours in tunnel with toxic and harmful gas.
The monitoring for setting tunnel according to being stayed to scene, roadway deformation amount very little, lane rear enclosed is good, can meet to keep the safety in production
Need.
Above content is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution, each falls within claims of the present invention
Protection domain within.
Claims (10)
1. a kind of suspension device for superelevation tunnel gob side entry retaining, it is characterised in that superelevation tunnel includes tunnel (1) and undercuts
Preceding tunnel (17), coal wall bear the side that side (5) is arranged on tunnel (1) and preceding tunnel (17) that undercut, goaf (3), working face (2)
Just helping (4) to be successively set on the opposite side of tunnel (1) and preceding tunnel (17) that undercut with coal wall, steel is arranged at intervals in tunnel (1)
Pipe concrete pillar (9) and folding rack (10) are used for supporting, and the concrete filled steel tube at goaf (3) place is located in tunnel (1)
The stull steel column (11) for being used for resisting tunnel side pressure is set on pillar (9), and back (18) is set for advanced pre-reinforcement
Reinforcement anchor cable (12).
A kind of 2. suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that reinforcement anchor
Rope (12) is arranged on the side that back (18) just helps (4) by coal wall, and vertical working top plate (18) is set, reinforcement anchor cable (12)
The distance that (4) are just being helped with coal wall is 300~800mm, and reinforcement anchor cable (12) is arranged with steel band (13).
A kind of 3. suspension device for superelevation tunnel gob side entry retaining according to claim 2, it is characterised in that reinforcement anchor
The diameter of rope (12)It is 6~20m for 15.24~21.6mm, length L, single arrangement, spacing is 600~1200mm.
4. a kind of suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that steel pipe mixes
The spacing of solidifying soil pillar (9) and folding rack (10) is 0.8~1.6m, the column and concrete filled steel tube at folding rack (10) both ends
Pillar (9) is located on the same line.
5. a kind of suspension device for superelevation tunnel gob side entry retaining according to claim 4, it is characterised in that steel pipe mixes
Solidifying soil pillar (9) is just helping (4) side and coal wall to bear side (5) side and respectively set up a row in coal wall, and bearing side (5) lateral extent apart from coal wall is
100~500mm, it is 300~600mm that (4) lateral extent is just being helped apart from coal wall.
6. a kind of suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that in tunnel
Top plate (18) is close to coal wall and just helps (4) side to be provided with presplit blasting hole (8), the distance of explosion first advance (2) for 20~
50m。
A kind of 7. suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that tunnel
(1) it is highly 4~6m to undercut positioned at working face (2) place to the tunnel between the preceding tunnel (17) that undercuts, and coal wall bears the setting of side (5) side
Anchor cable (6) and consolidate certainly anchor pole (7) be used for reinforce, coal wall just help (4) side set anchor cable (6), consolidate anchor pole (7) and fiberglass certainly
Anchor pole (15) is used for supporting.
A kind of 8. suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that tunnel
(1) the diamond shape mesh sheet (14) for being used for keeping off cash is set along goaf (3) side.
A kind of 9. suspension device for superelevation tunnel gob side entry retaining according to claim 8, it is characterised in that rhombus net
Plugging material (16) is injected with piece (14).
10. a kind of suspension device for superelevation tunnel gob side entry retaining according to claim 1, it is characterised in that undercut
Preceding tunnel (17) cross dimensions is a length of 3.0~4.8m, and width is 2.5~4.0m, and the coal wall at preceding tunnel (17) place that undercuts just is helped
(4), coal wall bears side (5) and back (18) uses anchor cable (6) and consolidates anchor pole (7) certainly and is connected to reinforce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711297735.5A CN107956481B (en) | 2017-12-08 | Supporting device for gob-side entry retaining of ultra-high roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711297735.5A CN107956481B (en) | 2017-12-08 | Supporting device for gob-side entry retaining of ultra-high roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107956481A true CN107956481A (en) | 2018-04-24 |
| CN107956481B CN107956481B (en) | 2024-07-02 |
Family
ID=
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026085A (en) * | 2018-07-25 | 2018-12-18 | 陕西煤业化工技术研究院有限责任公司 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
| CN109630050A (en) * | 2018-11-27 | 2019-04-16 | 陕西陕煤铜川矿业有限公司下石节煤矿 | A kind of Novel work face recovery approach support process |
| CN110939464A (en) * | 2019-11-29 | 2020-03-31 | 天地科技股份有限公司 | Gob-side entry retaining combined supporting method for adjacent working faces |
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| JP2017008619A (en) * | 2015-06-24 | 2017-01-12 | ケイコン株式会社 | Repair method of driving lane with swollen road bed of mountain tunnel of expressway, and suspension pier used therewith |
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