CN110439560A - A kind of construction technology of medium-thickness seam coal working face along the lane Kong Hu - Google Patents
A kind of construction technology of medium-thickness seam coal working face along the lane Kong Hu Download PDFInfo
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- CN110439560A CN110439560A CN201910704092.4A CN201910704092A CN110439560A CN 110439560 A CN110439560 A CN 110439560A CN 201910704092 A CN201910704092 A CN 201910704092A CN 110439560 A CN110439560 A CN 110439560A
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- 239000003245 coal Substances 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 238000005422 blasting Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 230000008093 supporting effect Effects 0.000 claims abstract description 11
- 238000007569 slipcasting Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 4
- 230000005641 tunneling Effects 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 10
- 239000010437 gem Substances 0.000 claims description 9
- 229910001751 gemstone Inorganic materials 0.000 claims description 9
- 230000001186 cumulative effect Effects 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims description 5
- 239000010451 perlite Substances 0.000 claims description 4
- 235000019362 perlite Nutrition 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000005065 mining Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- 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
- 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
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Remote Sensing (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to coal mining technology field, provides a kind of medium-thickness seam coal working face and be included in reserved tunnel along the construction technology in the lane Kong Hu and install hydraulic prop cooperation I-steel, and set anchor cable cooperation channel steel shield top；Presplit blasting hole is opened up on top plate；Monomer hydraulic supporting cooperation I-steel is installed at reserved tunnel and the fork of coal working face；I-steel is set up at the coal working face lag, moves towards first successively to be laid with steel mesh and metal mesh along tunnel, then installs hydraulic prop cooperation I-steel, then install oblique volumn supporting to I-steel strengthening supporting；Outside coal working face hysteresis region, hydraulic prop is withdrawn；Tunneling boring whitewashing processing is carried out to tunnel；Built-in slip casting pipe carries out slip casting below the top plate of coal working face.The present invention, which has, can be improved resource recovery, save production cost；It reduces on tunnel dynamic pressure influence is closed on, reduces the secondary maintenance capacity in tunnel；Reduce the technical effect of the labor intensity of worker.
Description
Technical field
The invention belongs to coal mining technology fields, specifically, being related to a kind of empty shield in medium-thickness seam coal working face edge
The construction technology in lane.
Background technique
Previous Some Domestic mine is studied and realizes fender even without coal pillar mining, but has roadway surrounding rock more and answer
Maintenance cost is excessive when power is high, roadway deformation amount is big, tunnel uses, and stays the fender set that crisp deformation, filling method is pressed to realize completely
Without coal column then obturation oxygen blast cyanidation, or even needing to help brush to expand in coal again, roadway maintenance cost has even surmounted new pick tunnel,
Tracing sth. to its source is that roof pressure is not released, and causes roadway deformation amount big, and the release of General Explosive means is due to its side
To uncontrollable, in some instances it may even be possible to cause to damage to tunnel, show to carry out using directional cumulation explosion to cut top by development test and unload
Pressure can solve the above problems.
Summary of the invention
For deficiency above-mentioned in the prior art, the purpose of the present invention is to provide a kind of medium-thickness seam coal working face edges
Resource recovery can be improved using this method in the construction technology in the lane Kong Hu, reduces digging ratio, saves production cost；It reduces to facing
Nearly tunnel dynamic pressure influences, reduces maintenance cost, reduces the secondary maintenance capacity in tunnel；The labor intensity of worker is reduced, labour is improved
The ventilation of Y type may be implemented in efficiency, gob side entry retaining.
In order to achieve the above object, the solution that the present invention uses is:
A kind of construction technology of medium-thickness seam coal working face along the lane Kong Hu, comprising the following steps:
S1 installs hydraulic prop cooperation I-steel, advanced work of constructing close to the side of coal working face in reserved tunnel
Make to complete in the 20m of face；Row's anchor cable is set close to the side of coal working face in reserved tunnel, anchor cable is connected and matched by anchor beam
Channel steel shield top is closed, is completed in construction first advance 20m~50m；
S2 opens up presplit blasting hole on top plate between reserved tunnel is close to coal working face side and construction anchor cable,
Installation cumulative presplitting pipe and powder charge progress explosion in pre- blast hole；
S3 installs monomer hydraulic supporting cooperation I-steel at reserved tunnel and the fork of coal working face；
S4 sets up I-steel in coal working face lag 3m, and I-steel top is beaten in channel steel, I-steel top and slot
Steel uses wooden wedge wedging, is successively laid with steel mesh and metal mesh along tunnel trend, steel mesh and metal mesh and I-steel are consolidated
It is fixed；Coal working face lags in 3m~30m, installs hydraulic prop cooperation I-steel, then install oblique volumn supporting to I-steel
Strengthening supporting；Coal working face lags outside 30m, withdraws hydraulic prop；Gob side entry retaining goaf wall sets up I-steel simultaneously
Setting is moved towards along tunnel；
S5 carries out tunneling boring whitewashing processing to tunnel, and closes steel mesh and metal mesh；
S6 built-in slip casting pipe below the top plate of coal working face carries out slip casting.
Preferably, in the S1, the trend of the vertical coal working face of I-steel is evenly arranged, between the two adjacent I-steel
Away from for 0.5m~1.0m.
Preferably, in the S1, channel steel is 14# channel steel, and anchor cable spacing is 1~2m, anchor beam spacing 0.1m~0.5m.
Preferably, in the S2, the spacing in presplit blasting hole is 0.2m~0.7m, and presplit blasting hole is arranged in a linear, in advance
The hole depth for splitting blast hole is 5m~8m, and presplit blasting hole aperture is 0.03m~0.07m.
Preferably, the spacing of presplit blasting hole and anchor cable is 0.1m~0.3m.
Preferably, in the S2, the two sides of cumulative presplitting pipe are provided with several jewel holes being equally spaced, the spacing between jewel hole
For 0.01m~0.03m, the aperture of jewel hole is 0.003m~0.008m.
Preferably, in the S2, the horizontal sextant angle of presplit blasting hole and reserved back is 75 °~90 °.
Preferably, in the S5, spray head when whitewashing is perpendicular to by spray plane, and distance is by spray plane 0.8m~1.0m；Using point
Zone circular mode is sprayed.
Preferably, if shield lane shoulder nest local segment goaf is caving insufficient, empty position is filled using perlite.
The beneficial effects of the present invention are:
(1) using cut top unloading technology can be effectively reduced stress in chain pillar concentrate and coal column in plastic failure
Range ensure that the safety during working face extraction；
(2) it takes along the advanced one emissions groove steel of complement of working face wall and connects anchor cable progress reinforcement supporting roof, it is quick-fried to cut top
I-steel deviates from steel mesh before broken, and girder steel top is beaten in channel steel, forms integer support top plate, girder steel point stress is avoided to obtain disadvantage
End, supporting effect are obvious；
(3) it cuts the top lane explosion Hou Hu shoulder nest local segment goaf top plate and is caving insufficient, change traditional coal (cash) filling sky
Hole mode, creative use perlite fill empty position, and realization is safely and fast constructed；
(4) the logical wind action of Y type not only may be implemented in gob side entry retaining construction technology, solves fully-mechanized mining working upper corner watt
This problem that transfinites；
(5) use is cut top release edge air gallery technology and is compared than building gob side entry retaining by former lane, alleviates worker's physical strength labor
It is dynamic, improve labor efficiency.
Appended drawing reference
Fig. 1 is medium-thickness seam coal working face in the present embodiment 1 along the structural schematic diagram of the construction technology in the lane Kong Hu.
In figure: 1- reserves tunnel；2- coal working face；The goaf 3-；4- hydraulic prop；5- I-steel；6- anchor cable；
7- channel steel；8- presplit blasting hole；9- Double-protection net；10- clashes column.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Below to a kind of medium-thickness seam coal working face provided in an embodiment of the present invention along the construction technology in the lane Kong Hu
It is specifically described.
Embodiment 1
Present embodiment discloses a kind of medium-thickness seam coal working faces along the construction technology in the lane Kong Hu, comprising the following steps:
S1 installs hydraulic prop 4 close to the side of coal working face 2 in reserved tunnel 1 and cooperates I-steel 5, and construction is super
It is completed in leading face 20m, the trend of the vertical coal working face 2 of I-steel 5 is evenly arranged, and two adjacent 2 spacing of I-steel are
0.6m~1.0m, preferably 0.7m~0.9m；Row's anchor cable 6, anchor are set close to the side of coal working face 2 in reserved tunnel 1
Rope 6 connects by anchor beam and cooperates the shield of channel steel 7 top, completes in construction first advance 20m~50m, channel steel 7 is 14# channel steel, anchor
6 spacing of rope is 1~2m, preferably 1.2m~1.8m；Anchor cable length is 5m~8m, preferably 6m~8m, using two double speed trees
Rouge Anchor Agent fixes anchor cable, and anchor cable 6 selects steel strand wires to cut；Anchor beam spacing 0.1m~0.5m, preferably 0.2m~0.4m.
S2 opens up presplit blasting on top plate between reserved tunnel 1 is close to 2 side of coal working face and construction anchor cable
Hole 8, the interior installation cumulative presplitting pipe in presplit blasting hole 8 and powder charge progress explosion；The spacing in presplit blasting hole 8 is 0.2m~0.7m,
Preferably 0.3m~0.5m；Presplit blasting hole 8 is arranged in a linear, and the hole depth in presplit blasting hole 8 is 5m~8m, with presplit blasting hole
8 ends reach subject to K2 roof, and 8 aperture of presplit blasting hole is 0.03m~0.07m, preferably 0.03m~0.05m；Presplitting
The horizontal sextant angle of blast hole 8 and reserved 1 top plate of tunnel is 75 °~90 °, preferably 80 °~90 °；Presplit blasting hole 8 and anchor cable 6
Spacing be 0.1m~0.3m；The two sides of cumulative presplitting pipe are provided with several jewel holes being equally spaced, and the spacing between jewel hole is
0.01m~0.03m, the aperture of jewel hole are 0.003m~0.008m.
S3 installs hydraulic prop 4 at reserved tunnel 1 and the fork of coal working face 2 and cooperates I-steel 5, pillar cloth
It is placed on same straight line, I-steel 5 connects top tightly by wooden wedge, and it is integral to use rope to be connected with each other.
S4 is lagged in coal working face 2 and is set up I-steel 5 in 3m, and I-steel top beats in channel steel 7, I-steel top and
Channel steel 7 uses wooden wedge wedging, is successively laid with steel mesh and metal mesh, steel mesh and metal mesh and I-steel along tunnel trend
5 are fixed by 8# iron wire, carry out overlapping and being connected firmly with iron wire between steel mesh and metal mesh, and steel mesh and metal mesh are constituted
Double-protection net 9；Coal working face lags in 3m~30m, installs hydraulic prop 4 and cooperates I-steel 5, then installs column in an opposite direction
10 pairs of 5 strengthening supportings of I-steel；Coal working face 1 lags outside 30m, withdraws hydraulic prop；Gob side entry retaining goaf wall
It sets up I-steel 5 and moves towards setting along tunnel, 5 spacing of I-steel is 0.5m~1.0m, preferably 0.6m~0.8m, using timber wedge
Son is fixed, branch intercolumniation 4m.
S5 carries out tunneling boring (tunnel tripartite) whitewashing processing to along sky shield tunnel section, and closes steel mesh and metal mesh, and
Tight wall crack can be closed, guarantees that goaf is not leaked out；To being handled in coal working face lag 30m, spray when whitewashing
Head is perpendicular to by spray plane, and distance is by spray plane 0.8m~1.0m；It is sprayed using subregion circular pattern.Light is wanted on concrete surface after spray
Sliding, smooth, arch circle, no dew steel mesh and metal mesh, dry and cracked phenomenon, no dry spot, do not slide, do not trickle, is glossy, bonding,
Rebound is few.
S6 built-in slip casting pipe below the top plate of coal working face 2 carries out slip casting, slip casting tube spacing 20m~50m/, excellent
30m~40m/ are selected as, slip casting length of tube is 1.0m.
If shield lane shoulder nest local segment goaf is caving insufficient, empty position is filled using expanding material, is expanded
Material is perlite.
I-steel also becomes girder steel, and I-steel is No. 11 mine I-steel in the present embodiment.
Working face manages top plate using whole caving methods using long-armed drawing back technique, goaf is moved towards.
The present invention is mined using retrusive, the Y-shaped ventilating system constituted with machine lane, air way air inlet, gob side entry retaining section return air.
The existing two tunnels air inlet of coal working face makes the opposite reduction of air quantity by working face, facilitates fire extinguishing and prevent from mining
Working face coal dust is flown upward, and improves environment on coalface, reduces goaf air leaking and Gas, so that having prevents coal working face
The effect of Gas Accumulation in Upper-Corner by Pulsed.Y-shaped ventilating system is since its gob side entry retaining changes goaf air leaking direction, and gas is with leaking out
It directly pours into along backlash air way, is preventing Gas Accumulation in Upper-Corner by Pulsed and face gas from transfiniting aspect better than U-shaped ventilating system.
In conclusion cutting top release edge air gallery technology is to form unloading space by cutting top, pressure is transferred to from lane
The farther away place in road achievees the purpose that tunnel mitigates and is pressurized, to realize the impact for avoiding reserved coal pillar to cause without coal pillar mining
Ground pressure, the disasters such as Gas Outburst.Resource recovery can be improved in the implementation for cutting top release gob side entry retaining, reduces digging ratio, saves life
Produce cost；It reduces on closing on tunnel dynamic pressure influence, reducing maintenance cost, reduces the secondary maintenance capacity in tunnel；Reduce the labor of worker
Fatigue resistance is improved labor efficiency.The ventilation of Y type may be implemented in gob side entry retaining, is to solve the problems, such as face upper corner angle gas accumulation
The implementation of effective means, the technology increases production and improves productivity with certain meaning to mine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of medium-thickness seam coal working face is along the construction technology in the lane Kong Hu, which comprises the following steps:
S1 installs hydraulic prop cooperation I-steel, first advance of constructing close to the side of coal working face in reserved tunnel
It is completed in 20m；Row's anchor cable is set close to the side of coal working face in reserved tunnel, anchor cable passes through anchor beam connection and mating groove
Steel shield top, construction first advance 20m~50m is interior to be completed；
S2 opens up presplit blasting hole on top plate between reserved tunnel is close to coal working face side and construction anchor cable, pre- quick-fried
Installation cumulative presplitting pipe and powder charge progress explosion in holes；
S3 installs monomer hydraulic supporting cooperation I-steel at reserved tunnel and the fork of coal working face；
S4 sets up I-steel in coal working face lag 3m, and I-steel top is beaten in channel steel, and I-steel top is adopted with channel steel
With wooden wedge wedging, steel mesh and metal mesh, steel mesh and metal mesh are successively laid with along tunnel trend and is fixed with I-steel；It adopts
Coal working face lags in 3m~30m, installs hydraulic prop cooperation I-steel, then install oblique volumn supporting and reinforce branch to I-steel
Shield；Coal working face lags outside 30m, withdraws hydraulic prop；Gob side entry retaining goaf wall sets up I-steel and along tunnel
Move towards setting；
S5 carries out tunneling boring whitewashing processing to tunnel, and closes steel mesh and metal mesh；
S6 built-in slip casting pipe below the top plate of coal working face carries out slip casting.
2. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S1, the trend of the vertical coal working face of I-steel is evenly arranged, and the two adjacent I-steel spacing are 0.5m~1.0m.
3. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S1, channel steel is 14# channel steel, and anchor cable spacing is 1~2m, anchor beam spacing 0.1m~0.5m.
4. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S2, the spacing in presplit blasting hole is 0.2m~0.7m, and presplit blasting hole is arranged in a linear, and the hole depth in presplit blasting hole is
5m~8m, presplit blasting hole aperture are 0.03m~0.07m.
5. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
The spacing of presplit blasting hole and anchor cable is 0.1m~0.3m.
6. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S2, the two sides of cumulative presplitting pipe are provided with several jewel holes being equally spaced, and the spacing between jewel hole is 0.01m~0.03m,
The aperture of jewel hole is 0.003m~0.008m.
7. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S2, the horizontal sextant angle of presplit blasting hole and reserved back is 75 °~90 °.
8. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
In the S5, spray head when whitewashing is perpendicular to by spray plane, and distance is by spray plane 0.8m~1.0m；It is carried out using subregion circular pattern
Injection.
9. medium-thickness seam coal working face according to claim 1 is along the construction technology of the lane Kong Hu method, which is characterized in that
If shield lane shoulder nest local segment goaf is caving insufficient, empty position is filled using perlite.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111335900A (en) * | 2020-03-25 | 2020-06-26 | 王�琦 | High-strength anchoring and grouting self-tunneling method and system |
| CN112112668A (en) * | 2020-09-25 | 2020-12-22 | 陕西煤业化工技术研究院有限责任公司 | Gob-side entry retaining gob gangue blocking closed structure and manufacturing method thereof |
| CN113356907A (en) * | 2021-07-15 | 2021-09-07 | 中煤第一建设有限公司 | Gob-side entry retaining construction process for coal seam disaster prevention and control |
| CN116927809A (en) * | 2023-09-12 | 2023-10-24 | 北京中京矿安科技有限公司 | Roadway support structure and construction method thereof |
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| 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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| CN112112668A (en) * | 2020-09-25 | 2020-12-22 | 陕西煤业化工技术研究院有限责任公司 | Gob-side entry retaining gob gangue blocking closed structure and manufacturing method thereof |
| CN113356907A (en) * | 2021-07-15 | 2021-09-07 | 中煤第一建设有限公司 | Gob-side entry retaining construction process for coal seam disaster prevention and control |
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