CN108049890A - A kind of suspension device and method for protecting support to empty lane - Google Patents
A kind of suspension device and method for protecting support to empty lane Download PDFInfo
- Publication number
- CN108049890A CN108049890A CN201810094504.2A CN201810094504A CN108049890A CN 108049890 A CN108049890 A CN 108049890A CN 201810094504 A CN201810094504 A CN 201810094504A CN 108049890 A CN108049890 A CN 108049890A
- Authority
- CN
- China
- Prior art keywords
- filling bag
- laminate layer
- bag
- suspension device
- empty lane
- 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
- 239000000725 suspension Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 13
- 229920001778 nylon Polymers 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000003442 weekly effect Effects 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A kind of suspension device and method for protecting support to empty lane, it is related to Mine construction engineering field, including filling bag and Grouting Pipe, the laminate layer that allows positioned at the branch sheath of filling bag bottom and at the top of filling bag is filled in filling bag, one end of Grouting Pipe be located at allow laminate layer it is corresponding filling bag side wall on, the other end is connected with pump, and filling bag is equipped with multiple suppending holes；A kind of suspension device to empty lane of the present invention, supporting performance is good, and it can guarantee the verticality and self stability of device, it can destructiveness of the restraint device material under pressure-bearing to a certain degree, so as to more effectively improve the integrated carrying ability of pillar, the design of laminate layer is allowed more effectively to ensure that fill bag realizes its whole supporting carrying effect in underground complex condition.
Description
Technical field
The present invention relates to Mine construction engineering field, more particularly to a kind of suspension device and method for protecting support to empty lane.
Background technology
The hollow lane in coal seam crushes near empty lane there are certain stress deformation region and ore deposit broken because being influenced by variation is adopted
Region, supporting when disclosing empty lane is difficult and wall caving, roof fall etc. easily occurs.The presence in empty lane efficiently produces band to mine safety
Carry out hidden danger, how it is safe and efficient a unavoidable engineering roadblock is just become by empty lane, and solve the key of this problem
It is to cut down the country rock movement of working face Cai Dongduikong lanes and destroys the dramatic impact generated.
At present, the technical measures in domestic coal mine fully-mechanized mining fully mechanized coal face Guo Kong lanes, abandoned working and small kiln old area are mainly reflected in
Strengthen empty lane technology and improve two aspect of coal winning technology.By consulting relevant information, this is solved without practicable method
Problem, it is therefore desirable to find a kind of practicable method and effective supporting is carried out to empty lane.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of suspension device to empty lane, and described device includes filling bag
And Grouting Pipe, the interior laminate layer that allows being filled with positioned at the branch sheath of filling bag bottom and at the top of filling bag of filling bag, Grouting Pipe
One end be located at allow laminate layer it is corresponding filling bag side wall on, the other end with pump connect, filling bag be equipped with multiple suppending holes.
The filling bag is equipped with multi-turn reinforcement, and the often circle reinforcement in multi-turn reinforcement is wrapped in described by iron wire and wiring
On the outer wall of the corresponding filling bag of branch sheath, and the spacing of the reinforcement per two adjacent rings is 13~15cm.
It is bag-shaped that the filling bag by nylon fiber cloth surrounds column, there is waterproof coat on nylon fiber cloth.
The top of the filling bag is equipped with gas vent.
Each suppending hole in the multiple suppending hole is the hole for being arranged on suppending hole cloth center, each suppending hole
5 correspond to one piece of suppending hole cloth, and suppending hole cloth is nylon fiber cloth, and are respectively positioned on the junction at the top of the filling bag with side wall.
The slip casting length of tube is 100-200mm, a diameter of 50-100mm, and the Grouting Pipe and the filling bag pass through glue
The mode connect is connected.
It is described that laminate layer height is allowed to be 300-500mm.
It is described that laminate layer is allowed to include water and allow laminate layer main material, and water and the mass ratio of laminate layer main material is allowed to be 1：(1.3-
1.5), wherein laminate layer main material is allowed to include hydraulic cementing materials and filler, the mass ratio of hydraulic cementing materials and filler is
1：(2-3).
The branch sheath includes water and branch sheath main material, and the mass ratio of water and branch sheath main material is 1：(1-1.5),
Branch sheath main material includes portland cement and filler, and the mass ratio of portland cement and filler is 1：(2-3).
A kind of method for protecting support of suspension device to empty lane includes：
Step 1: preparation：Grouting pump is placed in lane or removes frame passage；
Step 2: suspension described device：By the filling bag inflation, the multiple suppending hole is then fixed on lane
It on metal mesh at the top of road and tightens, and the bottom of described device is located at design position, and the filling bag is allowed to hang down naturally；
Step 3: fixed described device：The surrounding of the filling bag is uniformly bundled in more battens, and is close to described fill
Bag is filled out, and with four weekly check described device of messenger wire whether perpendicular to bottom plate；
Step 4: filling described device：Slurries are injected from the Grouting Pipe by pump, the branch sheath has once been filled
Into and after solidifying, refill it is described allow laminate layer, equally once filling is completed.
Description of the drawings
Fig. 1 is a kind of structure diagram of suspension device to empty lane provided by the invention；
Fig. 2 is a kind of suspension process schematic representation of suspension device to empty lane provided by the invention；
Fig. 3 is a kind of grouting construction process schematic diagram of suspension device to empty lane provided by the invention；
Fig. 4 is a kind of roof weighting stressing conditions schematic diagram of suspension device to empty lane provided by the invention：Wherein scheme a
Top schematic diagram is connect for device, figure b connects top first weighting schematic diagram for device；
Wherein,
1 filling bag, 2 Grouting Pipes, 3 sheaths, 4 allow laminate layer, 5 suppending holes, 6 reinforcements, 7 gas vents.
Specific embodiment
Existing in the prior art in order to solve the problems, such as, as shown in Figures 1 to 4, the present invention provides a kind of branch to empty lane
Protection unit, the device include filling bag 1 and Grouting Pipe 2, and it is bag-shaped that filling bag 1 by nylon fiber cloth surrounds column, on nylon fiber cloth
There is waterproof coat, waterproof coat is waterproof for sealing filling bag 1, and waterproof coat can use cement common on the market
It is mixed with waterproofing agent plus water, and is coated in the outer surface of filling bag 1；The parameter of nylon fiber cloth is：Perpendicular to filling bag 1
Axial rift elongation is 20%, drawing force 3000N；Axial rift elongation parallel to filling bag 1 is 30%, drawing force
For 1900N；
The top for filling bag 1 is equipped with gas vent 7, drains in time to fill the air in bag 1 during slip casting；Fill bag 1 also
Equipped with multiple suppending holes 5, so as to construction site, filling bag 1 with iron wire suspension to be fixed on underworkings top plate anchor online, more
Each suppending hole 5 in a suppending hole 5 is the hole for being arranged on suppending hole cloth center, and each suppending hole 5 corresponds to one piece of suppending hole
Cloth, suppending hole cloth are nylon fiber cloth, and can be set at 1 top of filling bag and the junction of side wall, each suppending hole 5
Put becket.
The branch sheath 3 that is located at filling bag 1 bottom is filled in filling bag 1 and allows laminate layer 4 positioned at 1 top of filling bag, is allowed
4 height of laminate layer is 300-500mm, allows the deflection of laminate layer 4 as 100~200mm, fills the height of bag 1 depending on actual conditions,
Such as：When the height for filling bag 1 is 4000mm, 4 height of laminate layer is allowed as 300-500mm, and the height of branch sheath 3 is then filling bag
1 height, which subtracts, allows laminate layer 4 highly, i.e. 4000mm- (300-500mm)=3700-3500mm；
Laminate layer 4 is allowed to include water and allow laminate layer main material, and water and the mass ratio of laminate layer main material is allowed to be 1：(1.3-1.5) its
In laminate layer main material is allowed to include hydraulic cementing materials and filler, the mass ratio of hydraulic cementing materials and filler is 1：(2-3),
The hydraulic cementing materials allowed in laminate layer main material includes sulphate aluminium cement and portland cement, sulphate aluminium cement and silicic acid
The mass ratio of salt cement is (2-3)：1, the filler allowed in laminate layer main material can be aggregate coarse aggregate, i.e., large-sized stone；
Water and laminate layer main material is allowed to be prepared by mixer stirring allow laminate layer slurries, laminate layer slurries is allowed according to actual conditions can in right amount to be added
Add adjustable solidification agent, laminate layer slurries is allowed to be filled into filling bag 1, formed at the top of filling bag 1 and allow laminate layer 4；
Branch sheath 3 includes water and branch sheath main material, and the mass ratio of water and branch sheath main material is 1：(1-1.5), branch
Sheath main material includes portland cement and filler, and the mass ratio of portland cement and filler is 1：(2-3), branch sheath 3 is with allowing
Laminate layer 4 can use identical filler, water and branch sheath main material to be prepared into branch sheath slurries, branch sheath slurry by mixer stirring
Liquid can add thickener and adjustable solidification agent in right amount according to actual conditions；Branch sheath slurries are filled into filling bag 1, in filling bag 1
Bottom form branch sheath 3, after branch sheath grout cures, density 1350g/cm3-1400g/cm3, it is a kind of dry powder-shaped, nothing
Malicious, non-corrosive inorganic material.
One end of Grouting Pipe 2, which is located at, to be allowed on the side wall of the corresponding filling bag 1 of laminate layer 4, and the other end of Grouting Pipe 2 connects with pump
Connect, 2 length of Grouting Pipe be 100-200mm, a diameter of 50-100mm, Grouting Pipe 2 with fill bag 1 be connected by way of splicing.
It fills bag 1 and is equipped with multi-turn reinforcement 6, the often circle reinforcement 6 in multi-turn reinforcement 6 is wrapped in supporting by iron wire and wiring
On the outer wall of 3 corresponding filling bag 1 of layer, and the spacing of the reinforcement 6 per two adjacent rings is 13~15cm；Reinforcement 6 can be steel wire,
Wire gauge is 2.65mm diameters, and tensile strength is 21MPa or so, firm welding between steel wire.
A kind of method for protecting support of suspension device to empty lane includes：
Step 1: preparation：Grouting pump is placed in lane or removes frame passage；Fed distance is about 250~300m；
Step 2: suspension described device：1 inflation of bag first will be filled with underground pressure air, then multiple suppending holes 5 will be consolidated
It is scheduled on the metal mesh at the top of tunnel and tightens, and the bottom of device is made to be located at design position, filling bag 1 is allowed to hang down naturally.It fills
It is particularly significant to fill out suspension and the fixation of bag 1, directly influences whether that the accurate location of pillar during slip casting, pillar connect very good bad property；
Step 3: fixed described device：As shown in Fig. 2, the surrounding of filling bag 1 is uniformly bundled in more battens, and it is tight
Patch filling bag 1, is bundled in thin wire on filling bag 1, and filling bag 1 is made to ensure that top bottom is respectively perpendicular to the roof and floor in tunnel, and
It does not glance off, and 4~6 3~5cm is used whether in bottom plate, the present embodiment with four weekly check described device of messenger wire
Wide and thick batten is close to fill bag 1, and length is 3m or so；
Step 4: filling described device：Slurries are injected from the Grouting Pipe 2 by pump, branch sheath 3 is once filled to completion
It and after solidifying, refills and allows laminate layer 4, equally once filling is completed.As shown in figure 3, in the output terminal of pump, can to connect three general
To fill two filling bags 1 simultaneously, so it is convenient in construction full of the safe and reliable control that bag filling is changed after filling bag 1, supporting
The once filling of layer 3 is forming in place, it can be ensured that the uniformity and mechanical uniformity of material；Fill 1 construction usage of bag when by
Power situation is as shown in Figure 4.
A kind of suspension device to empty lane of the present invention, supporting performance is good, can be in major diameter and higher supporting height
It is molded next time, and can guarantee the verticality and self stability of device；The filling bag 1 has stronger restraining force and waterproof
Property, can destructiveness of the restraint device material under pressure-bearing to a certain degree, so as to more effectively improve the integrated carrying ability of pillar,
Bearing capacity improves 38%.The design of laminate layer 4 is allowed more effectively to ensure that fill bag 1 realizes its entirety in underground complex condition
Supporting carrying effect.It allows laminate layer 4 that there is the compressive strain ability that centainly allows, can preferably meet " allow-resist " theory, be conducive to pillar
Allowing under underground different phase dynamic pressure variation presses characteristic, is released effectively and resists roof pressure, so as to better ensure that pillar
Effective load-carrying properties.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of suspension device to empty lane, which is characterized in that described device includes filling bag (1) and Grouting Pipe (2), fills bag
(1) the branch sheath (3) that is located at filling bag (1) bottom is filled in and allows laminate layer (4) at the top of filling bag (1), Grouting Pipe
(2) one end be located at allow laminate layer (4) it is corresponding filling bag (1) side wall on, the other end with pump connect, filling bag (1) be equipped with it is more
A suppending hole (5).
2. the suspension device according to claim 1 to empty lane, which is characterized in that the filling bag (1) adds equipped with multi-turn
Muscle (6), it is corresponding described that the often circle reinforcement (6) in multi-turn reinforcement (6) is wrapped in the branch sheath (3) by iron wire and wiring
On the outer wall for filling bag (1), and the spacing of the reinforcement (6) per two adjacent rings is 13~15cm.
3. the suspension device according to claim 1 to empty lane, which is characterized in that the filling bag (1) is by nylon fiber
It is bag-shaped that cloth surrounds column, there is waterproof coat on nylon fiber cloth.
4. the suspension device according to claim 1 to empty lane, which is characterized in that the top of the filling bag (1) is equipped with
Gas vent (7).
5. the suspension device according to claim 1 to empty lane, which is characterized in that every in the multiple suppending hole (5)
A suppending hole (5) is the hole for being arranged on suppending hole cloth center, and each suppending hole (5) corresponds to one piece of suppending hole cloth, suppending hole cloth
For nylon fiber cloth, and it is respectively positioned on the junction at the top of the filling bag (1) with side wall.
6. the suspension device according to claim 1 to empty lane, which is characterized in that Grouting Pipe (2) length is 100-
200mm, a diameter of 50-100mm, the Grouting Pipe (2) are connected with the filling bag (1) by way of splicing.
7. the suspension device according to claim 1 to empty lane, which is characterized in that described that laminate layer (4) is allowed highly to be 300-
500mm。
8. the suspension device according to claim 1 to empty lane, which is characterized in that described that laminate layer (4) is allowed to include water and allow
Laminate layer main material, and water and allow laminate layer main material mass ratio be 1：(1.3-1.5), wherein laminate layer main material is allowed to include the hydraulicity
The mass ratio of cementitious material and filler, hydraulic cementing materials and filler is 1：(2-3).
9. the suspension device according to claim 1 to empty lane, which is characterized in that the branch sheath (3) includes water and branch
Sheath main material, and the mass ratio of water and branch sheath main material is 1：(1-1.5), branch sheath main material include portland cement and
The mass ratio of filler, portland cement and filler is 1：(2-3).
10. a kind of method for protecting support of suspension device to empty lane described in claim 1, which is characterized in that the described method includes：
Step 1: preparation：Grouting pump is placed in lane or removes frame passage；
Step 2: suspension described device：By described filling bag (1) inflation, then the multiple suppending hole (5) is fixed on
It on metal mesh at the top of tunnel and tightens, and the bottom of described device is located at design position, and the filling bag (1) is allowed to hang down naturally
Under；
Step 3: fixed described device：The surrounding of the filling bag (1) is uniformly bundled in more battens, and is close to described fill
Bag (1) is filled out, and with four weekly check described device of messenger wire whether perpendicular to bottom plate；
Step 4: filling described device：Slurries are injected from the Grouting Pipe (2) by pump, the branch sheath (3) is once filled
After completing and solidifying, the laminate layer (4), equally once filling completion of allowing is refilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094504.2A CN108049890A (en) | 2018-01-31 | 2018-01-31 | A kind of suspension device and method for protecting support to empty lane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094504.2A CN108049890A (en) | 2018-01-31 | 2018-01-31 | A kind of suspension device and method for protecting support to empty lane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108049890A true CN108049890A (en) | 2018-05-18 |
Family
ID=62125026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810094504.2A Pending CN108049890A (en) | 2018-01-31 | 2018-01-31 | A kind of suspension device and method for protecting support to empty lane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108049890A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868838A (en) * | 2018-07-20 | 2018-11-23 | 天地科技股份有限公司 | The strong mine of underground coal mine presses tunnel high strength support system and method |
| CN109653778A (en) * | 2018-07-20 | 2019-04-19 | 天地科技股份有限公司 | A kind of working face return channel high strength support system and method |
| CN110761792A (en) * | 2019-12-02 | 2020-02-07 | 六盘水师范学院 | Old hole cutting device for coal face and application method |
| CN117307244A (en) * | 2023-11-02 | 2023-12-29 | 中国矿业大学 | A self-stabilizing integrated into one piece column type fills structure for underground mine |
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| CN102392660A (en) * | 2011-09-29 | 2012-03-28 | 辽宁工程技术大学 | Three-dimensional pressure-relieving supporting method for prolonging service lives of deep soft rock supports |
| CN102852552A (en) * | 2012-09-17 | 2013-01-02 | 扬州中矿建筑新材料科技有限公司 | High-water material filling column and construction method thereof |
| CN202851078U (en) * | 2012-09-17 | 2013-04-03 | 扬州中矿建筑新材料科技有限公司 | High water material filling column bag body |
| CN104500109A (en) * | 2014-12-19 | 2015-04-08 | 北京瑞诺安科新能源技术有限公司 | Underground support pillar and construction method thereof |
| CN106285738A (en) * | 2016-09-28 | 2017-01-04 | 山东科技大学 | A kind of " steel reinforced concrete hydraulic pressure " roadside support device for deep tunnel and method for protecting support |
| CN207905819U (en) * | 2018-01-31 | 2018-09-25 | 辽宁工程技术大学 | A kind of suspension device to empty lane |
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| US20100104376A1 (en) * | 2007-01-18 | 2010-04-29 | Nils Mittet Skarbovig | Grout bag type of underground support |
| CN102392660A (en) * | 2011-09-29 | 2012-03-28 | 辽宁工程技术大学 | Three-dimensional pressure-relieving supporting method for prolonging service lives of deep soft rock supports |
| CN102852552A (en) * | 2012-09-17 | 2013-01-02 | 扬州中矿建筑新材料科技有限公司 | High-water material filling column and construction method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868838A (en) * | 2018-07-20 | 2018-11-23 | 天地科技股份有限公司 | The strong mine of underground coal mine presses tunnel high strength support system and method |
| CN109653778A (en) * | 2018-07-20 | 2019-04-19 | 天地科技股份有限公司 | A kind of working face return channel high strength support system and method |
| CN109653778B (en) * | 2018-07-20 | 2021-03-02 | 天地科技股份有限公司 | High-strength support system and method for working face retraction channel |
| CN108868838B (en) * | 2018-07-20 | 2021-04-30 | 天地科技股份有限公司 | High-strength support system and method for underground high-pressure mine roadway of coal mine |
| CN110761792A (en) * | 2019-12-02 | 2020-02-07 | 六盘水师范学院 | Old hole cutting device for coal face and application method |
| CN117307244A (en) * | 2023-11-02 | 2023-12-29 | 中国矿业大学 | A self-stabilizing integrated into one piece column type fills structure for underground mine |
| CN117307244B (en) * | 2023-11-02 | 2024-05-07 | 中国矿业大学 | A self-stabilizing integrated into one piece column type fills structure for underground mine |
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