CN107060811A - The bracing means of thin coal pillar between a kind of tunnel - Google Patents
The bracing means of thin coal pillar between a kind of tunnel Download PDFInfo
- Publication number
- CN107060811A CN107060811A CN201710469396.8A CN201710469396A CN107060811A CN 107060811 A CN107060811 A CN 107060811A CN 201710469396 A CN201710469396 A CN 201710469396A CN 107060811 A CN107060811 A CN 107060811A
- Authority
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- China
- Prior art keywords
- coal pillar
- thin coal
- panels
- backplate
- layer
- 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
Links
- 239000003245 coal Substances 0.000 title claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005728 strengthening Methods 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000007596 consolidation process Methods 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000003139 buffering effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000009514 concussion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of bracing means of thin coal pillar between tunnel, including thin coal pillar, top plate and bottom plate, top plate is fixed with above the thin coal pillar, bottom plate is fixed with below the thin coal pillar, the thin coal pillar includes anchor cable and shield table panels, anchor hole is offered on the thin coal pillar, the backplate panels are fixedly installed in thin coal pillar both sides, and backplate panels upper and lower part is equipped with connecting device, the anchor cable is located in the anchor hole, and anchor cable runs through anchor hole, the two ends of the anchor cable are all extended on backplate panels, the anchor cable two ends are equipped with fixed lockset, the anchor hole is five, the thin coal pillar top is arranged with two anchor holes, middle part is provided with an anchor hole, bottom is arranged with two, the thin coal pillar is provided with the first grouting layer and the second grouting layer, first grouting horizon is on anchor hole inwall.The present invention is simple in construction, easy for installation, quick, and supporting is reliable, saves material, improve resource recovery ratio.
Description
Technical field
The present invention relates to a kind of bracing means of thin coal pillar between bracing means technical field, more particularly to tunnel.
Background technology
With the increase of coal mining intensity, progressively developed from superficial part to deep, deep mining is characterized in that crustal stress is high, structure
Complexity is made, Surrounding Rock Strength is low, the requirement more and more higher controlled Drift stability.Gob side entry retaining, gob side entry driving, upper and lower intermountain
Generally stay and set 5m-10m coal columns protection tunnel, but because mine pressure is big, strong exploitation disturbance, coal and rock self-strength is low
Factor influences, and coal column often deforms-unstability-destruction, difficulty is caused to Safety of Coal Mine Production, while staying wide coal column to cause greatly
The wasting of resources of amount.To improve recovery ratio, thin coal pillar is stayed, table component protection coal pillar is protected by anchor cable net and steel band, but still go out
The features such as large deformation destruction occur for existing network pocket, anchor pole failure damage, coal column, have a strong impact on mine safety production, meanwhile, typically adopt
The frequent seriously corroded under mine of thin coal pillar, thin coal pillar usage cycles greatly shorten, and it is overall change the thin coal pillar time and
Cost requirement is larger, is unfavorable for economic security production；Thin coal pillar typically uses steel-product, in use, due to exploitation disturbance, steel
Material product toughness not enough, is easily broken off, grouting layer is parallel construction, structural instability, anti-pressure ability is relatively low.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of bracing means of thin coal pillar between tunnel.
The bracing means of thin coal pillar between a kind of tunnel proposed by the present invention, including thin coal pillar, top plate and bottom plate, the narrow coal
It is fixed with above post below top plate, the thin coal pillar and is fixed with bottom plate, the thin coal pillar includes anchor cable and shield table panels,
Offer anchor hole on the thin coal pillar, the backplate panels are fixedly installed in thin coal pillar both sides, and backplate panels top and
Bottom is equipped with connecting device, and the anchor cable is located in the anchor hole, and anchor cable runs through anchor hole, and the two ends of the anchor cable extend
To backplate panels, the anchor cable two ends are equipped with fixed lockset, and the anchor hole is five, and the thin coal pillar top is symmetrically set
There are two anchor holes, middle part is provided with an anchor hole, and bottom is arranged with two, and the thin coal pillar is provided with the first grouting layer and second
Grouting layer, first grouting horizon is on anchor hole inwall, and second grouting layer extends through the on the connection anchor hole
One grouting layer.
Preferably, the connecting device includes upper member plate and lower member plate, and the upper member plate is close to lower member plate
Side be provided with sliding groove, the lower member plate close to the side of upper member plate be provided with spherical sliding block, the spherical sliding block with it is described
Sliding groove matches, and the side of the upper member plate away from sliding groove is provided with upper rubber layer, and the lower member plate is away from spherical cunning
The side of block is provided with lower rubber layer.
Preferably, the sliding groove is provided with spacing hole, and the spherical sliding block inwall is provided with sliding pearl groove, and sliding pearl groove is provided with
Sliding pearl, the sliding pearl matches with sliding groove, and the sliding groove is fixed with limited block, the slip close to one end of thin coal pillar
The one end of groove away from thin coal pillar is provided with movable fixture.
Preferably, the backplate panels are the steel plate of high compressive strength, and backplate panels are provided with strengthening groove, are strengthened
Groove is provided with reinforcement.
Preferably, first grouting layer and the second grouting layer are grout layer and chemical consolidation material layer.
Preferably, second grouting layer is solid layer, and the second grouting layer two ends connect in the middle of the first grouting layer respectively
Position, first grouting layer is in triangular form structure with second grouting layer.
Preferably, the anchor cable extends to two ends on backplate panels and is equipped with external screw thread, and the fixed lockset inner side is set
There is internal thread, the internal thread matches with the external screw thread.
Preferably, the anchor cable extends to two ends on backplate panels and is equipped with round tray, and the round tray is fixed
On anchor cable.
In the present invention, anchor cable and shield table panels are included by thin coal pillar so that the stabilization of thin coal pillar structure, pass through narrow coal
Post is provided with the first grouting layer and the second grouting layer, and the first grouting layer and the second grouting layer are in triangular form structure, pass through triangle
Type stability, substantially increases anti-pressure ability, and connecting device, connecting device bag are equipped with by backplate panels upper and lower part
Include and be respectively equipped with sliding groove and spherical sliding block on upper member plate and lower member plate, and upper member plate and lower member plate, by sliding
Using cooperatively for groove and spherical sliding block, facilitates the installation and removal of backplate panels, can install at any time with changing backplate panels,
Production cost and production time are saved, by being respectively equipped with upper rubber layer and lower rubber layer on upper member plate and lower member plate, is made
Obtain when violent concussion occurs in production work, reach the effect of buffering, be provided with by backplate panels on strengthening groove, strengthening groove
Provided with reinforcement, the stability of resistance to compression product is added, increases service life, the present invention is simple in construction, easy for installation, quick,
Supporting is reliable, saves material, improve resource recovery ratio；The bracing means of thin coal pillar can guarantee that coal column in larger top plate between tunnel
Pressure and the strong lower holding of exploitation disturbance are complete, and do not deform phenomenon of caving in.
Brief description of the drawings
Fig. 1 be a kind of tunnel proposed by the present invention between thin coal pillar bracing means structural representation；
Fig. 2 be a kind of tunnel proposed by the present invention between thin coal pillar bracing means side structure schematic diagram；
Fig. 3 be a kind of tunnel proposed by the present invention between thin coal pillar bracing means backplate component plate structure schematic diagram；
Fig. 4 be a kind of tunnel proposed by the present invention between thin coal pillar bracing means connecting device schematic diagram.
In figure：Lockset, 8 shields are fixed in 1 top plate, 2 bottom plates, 3 thin coal pillars, 4 anchor cables, 5 first grouting layers, 6 second grouting layers, 7
Table panels, 9 reinforcements, 10 connecting devices, 11 upper member plates, 12 sliding grooves, 13 spherical sliding blocks, 14 anchor holes, 15 lower member plates.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Embodiment
With reference to Fig. 1-4, the present embodiment proposes a kind of bracing means of thin coal pillar between tunnel, including thin coal pillar 3, top plate 1
With bottom plate 2, the top of thin coal pillar 3 is fixed with top plate 1, and the lower section of thin coal pillar 3 is fixed with bottom plate 2, and thin coal pillar 3 includes the He of anchor cable 4
Protect on table panels 8, thin coal pillar 3 and offer anchor hole 14, backplate panels 8 are fixedly installed in the both sides of thin coal pillar 3, and backplate component
The upper and lower part of plate 8 is equipped with connecting device 10, and anchor cable 4 is located in anchor hole 14, and anchor cable 4 runs through anchor hole 14, the two ends of anchor cable 4
All extend on backplate panels 8, the two ends of anchor cable 4 are equipped with fixed lockset 7, anchor hole 14 is five, and the top of thin coal pillar 3 is symmetrically set
There are two anchor holes 14, middle part is provided with an anchor hole 14, and bottom is arranged with two, thin coal pillar 4 is provided with the first grouting layer 5 and the
Two grouting layers 6, the first grouting layer 5 is located on the inwall of anchor hole 14, and the second grouting layer 6 extends through the first note on connection anchor hole 14
Pulp layer 5.Anchor cable 4 and shield table panels 8 are included by thin coal pillar 3 so that the stabilization of the structure of thin coal pillar 3, by being set on thin coal pillar 3
There are the first grouting layer 5 and the second grouting layer 6, and the first grouting layer 5 and the second grouting layer 6 are in triangular form structure, pass through triangular form
Stability, substantially increases anti-pressure ability, and connecting device 10, connecting device are equipped with by the upper and lower part of backplate panels 8
10 include being respectively equipped with sliding groove 12 and spherical on upper member plate 11 and lower member plate 15, and upper member plate 11 and lower member plate 15
Sliding block 13, by using cooperatively for sliding groove 12 and spherical sliding block 13, facilitates the installation and removal of backplate panels 8, Ke Yisui
When install with changing backplate panels 8, save production cost and production time, by upper member plate 11 and lower member plate 15 respectively
Provided with upper rubber layer and lower rubber layer so that when violent concussion occurs in production work, reach the effect of buffering, pass through backplate structure
Part plate 8 is provided with strengthening groove, and strengthening groove is provided with reinforcement 9, adds the stability of resistance to compression product, increases service life, this
Inventive structure is simple, easy for installation, quick, and supporting is reliable, saves material, improve resource recovery ratio；Thin coal pillar adds between tunnel
It is fixedly mounted with to put and can guarantee that coal column keeps complete under larger roof pressure and strong exploitation disturbance, not deforming, it is existing to cave in
As.
Connecting device 10 includes upper member plate 11 and lower member plate 15, and upper member plate 11 is set close to the side of lower member plate 15
There is sliding groove 12, lower member plate 15 is provided with spherical sliding block 13, spherical sliding block 13 and sliding groove 12 close to the side of upper member plate 11
Match, side of the upper member plate 11 away from sliding groove 12 be provided with upper rubber layer, lower member plate 15 away from spherical sliding block 13 one
Side is provided with lower rubber layer, and sliding groove 12 is provided with spacing hole, and the inwall of spherical sliding block 13 is provided with sliding pearl groove, and sliding pearl groove is provided with cunning
Pearl, sliding pearl matches with sliding groove 12, and sliding groove 12 is fixed with limited block close to one end of thin coal pillar 3, and sliding groove 12 is remote
One end of thin coal pillar 3 be provided with movable fixture, backplate panels 8 be high compressive strength steel plate, and backplate panels 8 provided with plus
Strong groove, strengthening groove is provided with reinforcement 9, and the first grouting layer 5 and the second grouting layer 6 are grout layer and chemical consolidation material layer,
Second grouting layer 6 is solid layer, and the two ends of the second grouting layer 6 connect the centre position of the first grouting layer 5, the first grouting layer 5 respectively
It is in triangular form structure with the second grouting layer 6, anchor cable 4 extends to two ends on backplate panels 8 and is equipped with external screw thread, fixed lockset 7
Inner side is provided with internal thread, and internal thread matches with the external screw thread, and anchor cable 4 extends to two ends on backplate panels 8 and is equipped with circle
Shape pallet, round tray is fixedly mounted on anchor cable 4, includes anchor cable 4 and shield table panels 8 by thin coal pillar 3 so that thin coal pillar
The stabilization of 3 structures, the first grouting layer 5 and the second grouting layer 6, and the first grouting layer 5 and the second slip casting are provided with by thin coal pillar 3
Layer 6 is in triangular form structure, by triangular form stability, substantially increases anti-pressure ability, passes through the upper and lower part of backplate panels 8
Connecting device 10 is equipped with, connecting device 10 includes upper member plate 11 and lower member plate 15, and upper member plate 11 and lower member plate
Sliding groove 12 and spherical sliding block 13 are respectively equipped with 15, by using cooperatively for sliding groove 12 and spherical sliding block 13, facilitates backplate
The installation and removal of panels 8, can at any time install with changing backplate panels 8, production cost and production time be saved, by upper
Rubber layer and lower rubber layer are respectively equipped with panels 11 and lower member plate 15 so that violent concussion occur in production work
When, the effect of buffering is reached, strengthening groove is provided with by backplate panels 8, strengthening groove is provided with reinforcement 9, adds resistance to compression
The stability of product, increases service life, and the present invention is simple in construction, easy for installation, quick, and supporting is reliable, saves material, improve
Resource recovery ratio；The bracing means of thin coal pillar can guarantee that coal column under larger roof pressure and strong exploitation disturbance between tunnel
Keep complete, do not deform phenomenon of caving in.
In use, by injecting the first grouting layer 5 and the second grouting layer 6 on thin coal pillar 4 so that the first grouting layer 5 and
Two grouting layers 6 are in triangular form structure, increase structural stability, connecting device is equipped with by the upper and lower part of backplate panels 8
10, connecting device 10 is provided with sliding groove 12 and spherical sliding block 13, and using cooperatively for sliding groove 12 and spherical sliding block 13 facilitates backplate
The installation and removal of panels 8, by being respectively equipped with upper rubber layer and lower rubber layer on upper member plate 11 and lower member plate 15, make
Obtain when violent concussion occurs in production work, reach the effect of buffering, strengthening groove, strengthening groove are provided with by backplate panels 8
Reinforcement 9 is provided with, the stability of resistance to compression product is added.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. the bracing means of thin coal pillar between a kind of tunnel, including thin coal pillar（3）, top plate（1）And bottom plate（2）, it is characterised in that institute
State thin coal pillar（3）Top is fixed with top plate（1）, the thin coal pillar（3）Lower section is fixed with bottom plate（2）, the thin coal pillar（3）
Including anchor cable（4）With shield table panels（8）, the thin coal pillar（3）On offer anchor hole（14）, the backplate panels（8）Gu
Dingan County is loaded on thin coal pillar（3）Both sides, and backplate panels（8）Upper and lower part is equipped with connecting device（10）, the anchor cable（4）
Positioned at the anchor hole（14）It is interior, and anchor cable（4）Through anchor hole（14）, the anchor cable（4）Two ends all extend to backplate panels
（8）On, the anchor cable（4）Two ends are equipped with fixed lockset（7）, the anchor hole（14）For five, the thin coal pillar（3）Top pair
Claim provided with two anchor holes（14）, middle part is provided with an anchor hole（14）, bottom is arranged with two, the thin coal pillar（4）It is provided with
First grouting layer（5）With the second grouting layer（6）, first grouting layer（5）Positioned at anchor hole（14）On inwall, second slip casting
Layer（6）Extend through the connection anchor hole（14）On the first grouting layer（5）.
2. the bracing means of thin coal pillar between a kind of tunnel according to claim 1, it is characterised in that the connecting device
（10）Including upper member plate（11）With lower member plate（15）, the upper member plate（11）Close to lower member plate（15）Side be provided with
Sliding groove（12）, the lower member plate（15）Close to upper member plate（11）Side be provided with spherical sliding block（13）, the spherical cunning
Block（13）With the sliding groove（12）Match, the upper member plate（11）Away from sliding groove（12）Side be provided with upper rubber
Layer, the lower member plate（15）Away from spherical sliding block（13）Side be provided with lower rubber layer.
3. the bracing means of thin coal pillar between a kind of tunnel according to claim 1, it is characterised in that the sliding groove（12）
It is provided with spacing hole, the spherical sliding block（13）Inwall is provided with sliding pearl groove, and sliding pearl groove is provided with sliding pearl, the sliding pearl and sliding groove
（12）Match, the sliding groove（12）Close to thin coal pillar（3）One end be fixed with limited block, the sliding groove（12）It is remote
Thin coal pillar（3）One end be provided with movable fixture.
4. the bracing means of thin coal pillar between a kind of tunnel according to claim 1, it is characterised in that the backplate panels
（8）For the steel plate of high compressive strength, and backplate panels（8）Strengthening groove is provided with, strengthening groove is provided with reinforcement（9）.
5. the bracing means of thin coal pillar between a kind of tunnel according to claim 1, it is characterised in that first grouting layer
（5）With the second grouting layer（6）For grout layer and chemical consolidation material layer；Second grouting layer（6）For solid layer, and second
Grouting layer（6）Two ends connect the first grouting layer respectively（5）Centre position, first grouting layer（5）With second grouting layer
（6）In triangular form structure.
6. the bracing means of thin coal pillar between a kind of tunnel according to claim 1, it is characterised in that the anchor cable（4）Prolong
Extend backplate panels（8）Upper two ends are equipped with external screw thread, the fixed lockset（7）Inner side is provided with internal thread, the internal thread
Matched with the external screw thread；The anchor cable（4）Extend to backplate panels（8）Upper two ends are equipped with round tray, the circle
Shape pallet is fixedly mounted on anchor cable（4）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710469396.8A CN107060811A (en) | 2017-06-20 | 2017-06-20 | The bracing means of thin coal pillar between a kind of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710469396.8A CN107060811A (en) | 2017-06-20 | 2017-06-20 | The bracing means of thin coal pillar between a kind of tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107060811A true CN107060811A (en) | 2017-08-18 |
Family
ID=59594881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710469396.8A Pending CN107060811A (en) | 2017-06-20 | 2017-06-20 | The bracing means of thin coal pillar between a kind of tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107060811A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410100A (en) * | 2019-07-13 | 2019-11-05 | 新疆大学 | The method that prestressed fiber cloth reinforced Room and Pillar Working Face leaves coal column |
| CN110617080A (en) * | 2019-09-10 | 2019-12-27 | 太原理工大学 | Narrow coal pillar anchor cable wall type reinforcing device and method |
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| US4775266A (en) * | 1986-12-22 | 1988-10-04 | Seegmiller Ben L | Structure and method for deterring cutter roof failure |
| CN103742171A (en) * | 2013-12-27 | 2014-04-23 | 中国矿业大学(北京) | Mining roadway coal pillar reinforcing method |
| CN103899342A (en) * | 2014-04-15 | 2014-07-02 | 中国矿业大学(北京) | Gob-side entrydriving coal pillar anchor cable through reinforcing method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN105422128A (en) * | 2015-12-14 | 2016-03-23 | 山东科技大学 | Method for preventing goaf gas leakage in deep shaft gob-side entry driving |
| CN205370610U (en) * | 2016-02-15 | 2016-07-06 | 山东科技大学 | Reinforcing apparatus of narrow coal column between tunnel |
| CN105804776A (en) * | 2016-03-15 | 2016-07-27 | 山东科技大学 | Opposite pulling type anchor rods for gob-side entrydriving small coal pillar and support method thereof |
| CN105971640A (en) * | 2016-07-08 | 2016-09-28 | 西安科技大学 | Strengthening method for gob-side entrydriving narrow coal pillar |
-
2017
- 2017-06-20 CN CN201710469396.8A patent/CN107060811A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775266A (en) * | 1986-12-22 | 1988-10-04 | Seegmiller Ben L | Structure and method for deterring cutter roof failure |
| CN103742171A (en) * | 2013-12-27 | 2014-04-23 | 中国矿业大学(北京) | Mining roadway coal pillar reinforcing method |
| CN103899342A (en) * | 2014-04-15 | 2014-07-02 | 中国矿业大学(北京) | Gob-side entrydriving coal pillar anchor cable through reinforcing method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410100A (en) * | 2019-07-13 | 2019-11-05 | 新疆大学 | The method that prestressed fiber cloth reinforced Room and Pillar Working Face leaves coal column |
| CN110617080A (en) * | 2019-09-10 | 2019-12-27 | 太原理工大学 | Narrow coal pillar anchor cable wall type reinforcing device and method |
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Application publication date: 20170818 |
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| RJ01 | Rejection of invention patent application after publication |