CN108194141B - Mouth block wall under a kind of coal mine offset - Google Patents
Mouth block wall under a kind of coal mine offset Download PDFInfo
- Publication number
- CN108194141B CN108194141B CN201711458813.5A CN201711458813A CN108194141B CN 108194141 B CN108194141 B CN 108194141B CN 201711458813 A CN201711458813 A CN 201711458813A CN 108194141 B CN108194141 B CN 108194141B
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- monomer
- block wall
- plank
- anchor cable
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- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 31
- 239000000178 monomer Substances 0.000 claims abstract description 85
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 12
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000005065 mining Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 5
- 230000032258 transport Effects 0.000 claims description 4
- 241000124033 Salix Species 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000009191 jumping Effects 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 2
- -1 anchor cable Substances 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002023 wood Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The present invention provides mouth block walls under a kind of coal mine offset, including block plank, monomer column, in an opposite direction column, diagonal brace monomer, π beam, stull, I-steel, anchor cable, and monomer column branch is set under offset in the slotting of mouth bottom plate；Plank is blocked to be close on the inside of monomer column；Every monomer column all installs column in an opposite direction, and column is located on the outside of monomer column in an opposite direction；Diagonal brace monomer branch is set on the outside of column in an opposite direction；π beam is respectively set at monomer column and diagonal brace monomer bottom lateral position；Stull is located between two π beams；The I-steel of fixed anchor cable is respectively set in monomer column outer upper and lower part, I-steel is perpendicular to monomer column, top plate and bottom plate brill on the inside of block wall beats anchor cable eye, anchor cable is kept to be fixed on I-steel across plank is blocked after installing anchor cable, anchor cable, which is blocked on I-steel and used with U-shaped card, twists rod tensioner lock jail.Mouth block wall under coal mine offset of the invention, installation is simple, highly-safe, and the recyclable recycling of material, reduces the cost of enterprise.
Description
Technical field
The present invention relates to the block walls blocked in a kind of coal mine to mouth under goaf back production offset.
Background technique
To exploitation cavity after the seam mining of underground coal mine, can be left, to prevent surface collapse, it is necessary to will be mined out
Area is filled, and when filling first has to block goaf, could inject filler.Currently, common method for blocking
Block wall is usually set, and the effect of block wall is mainly reflected in following two aspect: first is that closed isolation goaf, prevents from filling
The excessive and slurry of bursting of material；Second is that water filtering function is played, when the effect of drainage will seriously affect the maintenance of later period filler
Between and filling quality.
In the prior art, the form of block wall mainly has wooden block wall, concrete block wall, brick structure block wall, steel
Structural traps wall, hydraulic block wall etc., wherein the construction cost of concrete block wall is high, curing cycle is long；Brick structure blocks
Wall freight volume is big, labor intensity is high；Steel construction block wall material cost is high, labor intensity of workers is big；And hydraulic block wall is to envelope
The condition of wall requires relatively high and equipment difficult in maintenance.The cost of material is low for wooden block wall, labor intensity of workers also compared with
It is small, but the intensity of wooden block wall is less than normal, easily fails in stowing operation, it is therefore necessary to reinforce wooden block wall
Supporting improves the intensity of wooden block wall.
The monomer supporting cooperation used in colliery industry at present blocks wooden block wall made of plank, by blocking
Monomer column is added on the outside of plank, the intensity of block wall can be improved to a certain extent, but disadvantage is it is also obvious that main
Have: first, supporting intensity is limited, and the safety of block wall is poor, it cannot be guaranteed that the safety problem in stowing operation, and fill effect
Rate is low, affects the construction working in later period.Second, since plugging strength is smaller, plugging material is easily damaged, and leads to material
Recycling rate of waterused is low.Third, in filling, mouth pressure is larger at present, in order to reinforce plugging strength, needs to increase the close of monomer supporting
Degree, causes material consumption larger.4th, in order to guarantee plugging effect, height, width when needing strict control laneway opening and
Roadway gradient influences production efficiency.
Utility model patent (CN204002917 fills wall supporting mechanism) discloses a kind of supporting mechanism for filling wall,
Iron plate is set on the inside of block wall, and iron plate connects vertical fixed mechanism by supporting mechanism, and vertical fixed mechanism is on connection offset
The support column with spacing regulation pipe and fine tuning pipe in portion and lower part, supporting mechanism have two, are respectively hinged at block wall iron plate
Between vertical fixed mechanism, using the support force of vertical fixed mechanism, filling wall is supported.This supporting mechanism is only
Carry out supporting block wall by the support force of vertical fixed mechanism, support pattern is single, and to the material of vertical fixed mechanism and
Installation process is more demanding, and processing cost is high.
Utility model patent (CN206071644, a kind of plugging device of coal mine roadway) discloses one kind by plank layer structure
At plugging device, iron wire stratum reticulare, filtering layer of cloth and plank layer are set from inside to outside, and being equipped on the outside of plank layer being capable of support board
The upright hydraulic prop of layer is additionally provided with the hydraulic column in an opposite direction being used to support on the outside of every hydraulic prop.This plugging device is to wood
The support action of plate layer (namely block wall) is single, adds that the wooden block wall of monomer column is similar, and supporting intensity has with above-mentioned
Limit.
To solve the above-mentioned problems, there is an urgent need to propose a kind of effective technical solution.
Summary of the invention
In order to reinforce the closure in goaf in coal mine, the present invention provides mouth block walls under a kind of coal mine offset, including envelope
Stifled plank, monomer column, in an opposite direction column, diagonal brace monomer, π beam, stull, I-steel, anchor cable,
The monomer column branch is set under offset in the slotting of mouth bottom plate；
The closure plank is close on the inside of monomer column；
The every monomer column all installs column in an opposite direction, and column is located on the outside of monomer column in an opposite direction；
The diagonal brace monomer branch is set on the outside of column in an opposite direction；
π beam is respectively set at the monomer column and diagonal brace monomer bottom lateral position；
The stull is located between two π beams；
The I-steel of fixed anchor cable is respectively set in the monomer column outer upper and lower part, I-steel is perpendicular to monomer
Column, the top plate and bottom plate brill on the inside of the block wall beat anchor cable eye, keep anchor cable solid across plank is blocked after installing anchor cable
It is scheduled on the I-steel, anchor cable, which is blocked on I-steel and used with U-shaped card, twists rod tensioner lock jail.
Preferably, mouth lifter cut depth is not less than 0.3m under the offset, and width can guarantee that blocking plank and monomer stands
In column can be placed into, the coal wall on block wall both sides is cleared up, guarantees that coal wall is straight.
Preferably, the monomer column column connects bottom bracing top away from equal, and every monomer column salutes wooden cap, anti-down rope, column leg
It is sitting in slotting on real bottom, setting load is not less than 90KN.
Preferably, described to block the willow plate that plank is 50mm thickness, both ends are more than that lane side is not less than 1.0m, block wood up and down
Sheet separation is no more than 20mm, and front-back staggered is no more than 10mm between blocking plank, blocks plank and back closely connects reality, maximum
Gap is no more than 50mm.
Preferably, away from equal, capital band cap, column leg is sitting on real bottom the diagonal brace monomer column, with monomer column in falling eight
Font.
Preferably, for the column in an opposite direction in an opposite direction at monomer column handle, column angle is not less than 45 ° in an opposite direction, in column column undercut in an opposite direction, makes
Column column leg is supported on real bottom in an opposite direction.
Preferably, the stull setting load is not less than 90KN.
Preferably, the I-steel length is not less than the width for blocking plank；The I-steel is 11# mining i beam.
Preferably, the anchor cable spacing is equal, is no more than 0.30 meter away from roadway's sides.
A method of it is blocked using mouth block wall under coal mine offset, operating procedure is as follows:
(1) preparation before blocking transports the plugging material in place；
(2) the mouth lifter cut under offset, and clear up block wall two sides coal wall, it is ensured that coal wall is smooth；
(3) the top plate and bottom plate brill on the inside of block wall beats anchor cable eye, installs anchor cable；
(3) monomer column branch is located in slotting；
(4) woven straw of jumping a queue on the inside of mouth surrounding is blocked；
(5) plank will be blocked and is close to the stacking of monomer column, blocked completely until mouth entirely will be blocked；
(6) column in an opposite direction is installed on the outside of every monomer column；
(7) row's diagonal brace monomer is installed on the outside of column in an opposite direction；
(8) π beam is set in monomer column and diagonal brace monomer bottom lateral position；
(9) stull is installed between two π beams；
(10) I-steel is respectively set in monomer column outer upper and lower part, will be arranged at the top plate on the inside of block wall
Anchor cable pass through and block plank and be fixed on the I-steel of monomer column outer upper, the anchor being arranged on the inside of block wall at bottom plate
Bands passes through closure plank and is fixed on the I-steel of monomer column outer lower portion, and anchor cable uses U-shaped card subcard on I-steel
It is firmly and firm with rod tensioner lock is twisted；
(11) it after the completion of blocking work, checks comprehensively and blocks quality, it is ensured that meet filling and require.
Compared with prior art, the beneficial effects of the present invention are:
(1) strong applicability can adjust the size of block wall according to offset opening size.
(2) expense is low, and closure plank, monomer column in closure scheme etc. can recycle and reuse.
(3) time is short, and it is fast that speed is set up in block wall installation, will not influence normal production.
(4) safety is higher, can change the shape of block wall according to block-up position, prevent the distance of face roof under control excessive, after influencing
The safety in production of phase.
(5) it is simple, easy to learn to block wall construction, the easy learning and mastering of worker sets up in the process not complicated machinery, process,
It does not need that special messenger arrange to remove producer or nonlocal training and learning.
(6) freight is low, and safety is secure, simple due to blocking wall construction, does not have special machine equipment, saves spy
Different mechanical transport expense, does not need to specify special traffic program and route.
Detailed description of the invention
Fig. 1 is that mouth blocks floor map under offset.
Fig. 2 is that mouth blocks diagrammatic cross-section under offset.
In figure: 1- π beam, 2- monomer column, 3- wood top cap, 4- diagonal brace monomer, 5- clash column, 6- stull, 7- haulage gate, 8-
Block plank, 9-11# mining i beam, 10- monomer column handle, 11- lifter cut, 12- anchor cable.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention are described in detail.
Using 110902 working face pilot production sections of Wuhai City Tian Yu Trade Co., Ltd. design as construction ground, returned in back production offset
It needs to be blocked in time after the completion of adopting, blocks point and be located at below offset, it is ensured that the height and width of block wall can block entirely
Offset opening.
In order to increase block wall intensity, need to carry out closure preparation in advance, first by various plugging materials, comprising:
Block plank 8, π beam 1 (length determines according to field condition), monomer column 2, stull 6, woven straw, anchor cable 12 (length according to
Field condition determines), the transports such as rigging in place.
Determine mouth block-up position under offset, establishment officer starts to construct, and clears up sundries on roadway floor, draws on bottom plate
Slot, the depth of lifter cut 11 are not less than 0.3m, and the width of lifter cut 11 guarantees that blocking plank 8 and monomer column 2 can put
It sets in slot, clears up the coal wall on block wall both sides, guarantee that coal wall is straight.
Block wall (on) front be the inside place 1-2m top plate and 3-5 rice at bottom plate at brill beat anchor cable eye, installation anchor
Anchor cable 12 is drawn after rope；It is the steel strand wires of φ 15.24mm that anchor cable 12, which selects specification, and powder stick is CK2335 type resin explosive roll,
Every fills the medicines of volume 3, and the pulling capacity of every anchor cable is no less than 200kN.
It installs monomer column 2 in slotting 11 on bottom plate, 0.3 meter of spacing, connects bottom bracing top, 2 °~3 ° of prop setting angle degree.Often
There are the wooden top cap 3, anti-down rope on root monomer column 2, column leg is sitting in kerve 11 on real bottom, meets that mountain is strong, and setting load is not less than
90kN。
Installing blocks plank 8 since kerve 11, blocks plank 8 and selects specification for the willow plate of 4000 × 200 × 50mm,
Blocking 8 both ends of plank is more than that lane side is not less than 1.0m, and upper and lower plank gap is no more than 20mm, and front-back staggered is no more than between plank
10mm, plank and the critical contiguity of back are real, and maximal clearance is no more than 50mm, on the inside of block wall surrounding with woven straw plug sternly,
Compacting avoids dropping down slurry, and the moisture being precipitated in obturation is filtered out by the woven straw of surrounding.
Block wall outer patch block plank 8 the outer top of monomer column 2 away from top 0.8~1.2 meter at lower part far from bottom 0.8~
The 11# mining i beam 9 of fixed anchor cable is set at 1.2 meters, the anchor cable 12 being arranged on top plate on the inside of block wall is passed through and is blocked
Plank 8 is fixed on the 11# mining i beam 9 of 2 top of monomer column setting, and the anchor cable 12 on bottom plate on the inside of block wall is worn
It crosses closure plank 8 to be fixed on the 11# mining i beam 9 of 2 lower part of monomer column setting, 11# mining i beam 9 is perpendicular to closure
The outer monomer column 2 of plank 8 is laid, and length is not less than block wall length, blocks anchor cable with U-shaped card on 11# mining i beam 9
Line 12 is simultaneously firm with rod tensioner lock is twisted, and anchor cable spacing 1m is no more than 0.3m away from roadway's sides.
Outside block wall, away from row's diagonal brace monomer 4 is installed at block wall 1m left-right position, column is away from 1m, capital band cap, column leg
It is sitting on real bottom, is laid with monomer column 2 in herringbone.Laterally (column is in a row square for diagonal brace monomer 4 and 2 bottom of monomer column
To) π beam 1 is placed, longitudinal (offset direction of advance) installs strong and reliable stull 6, spacing 0.8m.Monomer column 2 and π beam 1 support
Fastening jail, setting load are not less than 90kN.
Monomer column 2 outside close to block wall, every all installs column 5 in an opposite direction, and column 5 is clashed at individual prop handle 10 in an opposite direction, in an opposite direction
5 angle of column is not less than 45 °, and 5 column leg of column is supported on real bottom and (draws nest in column bottom) in an opposite direction.
After the completion of entire closure work, closure quality is checked comprehensively, it is ensured that blocked quality satisfaction filling and required.
Mouth block wall under coal mine offset provided by the invention, installation is simple, highly-safe, and the recyclable repetition benefit of material
With reducing the cost of enterprise.
A series of detailed description illustrating only for feasible embodiment of the invention described above,
They are not to limit the scope of the invention, in the knowledge that the technical field those of ordinary skill has
Interior, the various change made without departing from the purpose of the present invention all belongs to the scope of protection of the present invention.
Claims (10)
1. mouth block wall under a kind of coal mine offset, it is characterised in that: including blocking plank, monomer column, in an opposite direction column, diagonal brace monomer, π
Beam, stull, I-steel, anchor cable,
The monomer column branch is set under offset in the slotting of mouth bottom plate；
The closure plank is close on the inside of monomer column；
The every monomer column all installs column in an opposite direction, and column is located on the outside of monomer column in an opposite direction；
The diagonal brace monomer branch is set on the outside of column in an opposite direction；
π beam is respectively set at the monomer column and diagonal brace monomer bottom lateral position；
The stull is located between two π beams；
The I-steel of fixed anchor cable is respectively set in the monomer column outer upper and lower part, I-steel is vertical perpendicular to monomer
Column, the top plate and bottom plate brill on the inside of the block wall beat anchor cable eye, keep anchor cable to fix across plank is blocked after installing anchor cable
On the I-steel, anchor cable, which is blocked on I-steel and used with U-shaped card, twists rod tensioner lock jail.
2. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: mouth lifter cut under the offset
Depth is not less than 0 .3m, and width can guarantee that interior, the coal on cleaning block wall both sides can be placed by blocking plank and monomer column
Wall guarantees that coal wall is straight.
3. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the monomer column column is away from phase
Deng connecing bottom bracing top, every monomer column salutes wooden cap, anti-down rope, and column leg is sitting in slotting on real bottom, and setting load is not less than
90KN。
4. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the closure plank is 50mm thick
Willow plate, both ends be more than lane side be not less than 1.0m, up and down block plank gap be no more than 20mm, block plank between front-back staggered
No more than 10mm, blocks plank and back closely connects reality, maximal clearance is no more than 50mm.
5. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the diagonal brace monomer column is away from phase
Deng, capital band cap, column leg is sitting on real bottom, is in herringbone with monomer column.
6. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the column in an opposite direction is in an opposite direction in monomer column
At handle, in an opposite direction column angle be not less than 45 °, in column column undercut in an opposite direction, make in an opposite direction column column leg be supported on real bottom.
7. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the stull setting load is not less than
90KN。
8. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the I-steel length is not less than
Block the width of plank；The I-steel is 11# mining i beam.
9. mouth block wall under a kind of coal mine offset as described in claim 1, it is characterised in that: the anchor cable spacing is equal, away from
Roadway's sides are no more than 0 .30 meters.
10. the method blocked using mouth block wall under the coal mine offset of any of claims 1-9, feature are existed
In operating procedure is as follows:
(1) preparation before blocking transports the plugging material in place；
(2) the mouth lifter cut under offset, and clear up block wall two sides coal wall, it is ensured that coal wall is smooth；
(3) the top plate and bottom plate brill on the inside of block wall beats anchor cable eye, installs anchor cable；
(4) monomer column branch is located in slotting；
(5) woven straw of jumping a queue on the inside of mouth surrounding is blocked；
(6) plank will be blocked and is close to the stacking of monomer column, blocked completely until mouth entirely will be blocked；
(7) column in an opposite direction is installed on the outside of every monomer column；
(8) row's diagonal brace monomer is installed on the outside of column in an opposite direction；
(9) π beam is set in monomer column and diagonal brace monomer bottom lateral position；
(10) stull is installed between two π beams；
(11) I-steel is respectively set in monomer column outer upper and lower part, the anchor being arranged at the top plate on the inside of block wall
Bands passes through closure plank and is fixed on the I-steel of monomer column outer upper, the anchor cable being arranged at bottom plate on the inside of block wall
It is fixed on the I-steel of monomer column outer lower portion across plank is blocked, anchor cable is blocked simultaneously on I-steel with U-shaped card
With twisting, rod tensioner lock is firm；
(12) it after the completion of blocking work, checks comprehensively and blocks quality, it is ensured that meet filling and require.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458813.5A CN108194141B (en) | 2017-12-28 | 2017-12-28 | Mouth block wall under a kind of coal mine offset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458813.5A CN108194141B (en) | 2017-12-28 | 2017-12-28 | Mouth block wall under a kind of coal mine offset |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194141A CN108194141A (en) | 2018-06-22 |
| CN108194141B true CN108194141B (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711458813.5A Expired - Fee Related CN108194141B (en) | 2017-12-28 | 2017-12-28 | Mouth block wall under a kind of coal mine offset |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996194A (en) * | 1995-09-29 | 1997-04-08 | Shimizu Corp | Structure of support wall and construction method therefor |
| CN101514633A (en) * | 2009-02-10 | 2009-08-26 | 河北金牛能源股份有限公司葛泉矿 | Gob-side entry retaining process without roadside support |
| CN102606207A (en) * | 2012-04-06 | 2012-07-25 | 陕西开拓建筑科技有限公司 | Mine gob filling and entry retaining device system and filling method |
| CN102720498A (en) * | 2012-06-20 | 2012-10-10 | 鄂托克前旗长城煤矿有限责任公司 | Gob-side entry retaining mining process for coal face |
| CN104832188A (en) * | 2015-04-17 | 2015-08-12 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
-
2017
- 2017-12-28 CN CN201711458813.5A patent/CN108194141B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996194A (en) * | 1995-09-29 | 1997-04-08 | Shimizu Corp | Structure of support wall and construction method therefor |
| CN101514633A (en) * | 2009-02-10 | 2009-08-26 | 河北金牛能源股份有限公司葛泉矿 | Gob-side entry retaining process without roadside support |
| CN102606207A (en) * | 2012-04-06 | 2012-07-25 | 陕西开拓建筑科技有限公司 | Mine gob filling and entry retaining device system and filling method |
| CN102720498A (en) * | 2012-06-20 | 2012-10-10 | 鄂托克前旗长城煤矿有限责任公司 | Gob-side entry retaining mining process for coal face |
| CN104832188A (en) * | 2015-04-17 | 2015-08-12 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
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| Publication number | Publication date |
|---|---|
| CN108194141A (en) | 2018-06-22 |
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