CN106523003A - Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway - Google Patents
Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway Download PDFInfo
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- CN106523003A CN106523003A CN201610854612.6A CN201610854612A CN106523003A CN 106523003 A CN106523003 A CN 106523003A CN 201610854612 A CN201610854612 A CN 201610854612A CN 106523003 A CN106523003 A CN 106523003A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000005065 mining Methods 0.000 title claims abstract description 16
- 230000008878 coupling Effects 0.000 title abstract 3
- 238000010168 coupling process Methods 0.000 title abstract 3
- 238000005859 coupling reaction Methods 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000009412 basement excavation Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 9
- 239000010432 diamond Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 45
- 239000004567 concrete Substances 0.000 abstract description 9
- 238000005452 bending Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- 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
- 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
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- 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
- E21D21/008—Anchoring or tensioning means
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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a rigid-flexible coupling energy absorbing support technology suitable for a deep mining roadway and belongs to the technical field of mine supports. The technology comprises the specific steps that in the roadway excavation advancement process, an anchor net and anchor rods (anchor cables) are installed at the top and the two sides of the roadway, wherein the portions, at the top of the roadway, of the anchor net and the anchor rods are connected through prestressing plates; and then high pretightening force is applied to the energy absorbing threaded anchor rods and the grouting anchor cables, then plain (or steel fiber) concrete is sprayed, and the energy absorbing threaded anchor rods are fixed to the vertex and the two sides through M-shaped steel bands. According to the rigid-flexible coupling energy absorbing support technology suitable for the deep mining roadway, the tensile strength, the bending resistance and the rigidity of the top and the two sides of the roadway are improved, larger surrounding rock deformation can be borne, and the impact load effect of rock mass internal burst, rock explosion and the like can be resisted.
Description
Technical field
The present invention relates to technical field of mine support, particularly relates to a kind of Coupled Rigid-flexible energy-absorbing for being suitable to deep mining tunnel
Support technology.
Background technology
Economic high speed sustainable development and National Security Strategy be unable to do without the exploitation of mineral resources, continuous with superficial part resource
Consume, underground mine proceeds to deep mining successively.Deep mining engineering rock mass is in heavily stressed, Gao Yanwen, Thief zone water pressure
Under the complicated geological and mechanical environment of exploitation disturbance (i.e. " three high disturbances "), its tunnel presents obvious area with surrounding rock of chamber
Not in superficial part elastic deformation, the crisp-ductility large deformation of brittle break and ductile spall, absciss layer splitting, brittle flaking off, sillar bullet
New dynamic disaster phenomenons a series of with section rock burst etc. are penetrated, causes calamity complicated mechanism, stability to be difficult to control to.Coupled Rigid-flexible energy-absorbing
Support technology can effectively buffer and absorb the huge energy discharged when roadway surrounding rock body is destroyed, and improve tunnel monolithic stability
Property, to protecting the life security of personnel and the production safety tool of job facilities to be of great significance.
At present, China's underground mining drift support type mainly has anchor pole (rope) supporting, bolting with wire mesh, grouting cable anchor and anchor
Bar combined supporting, shed ding support etc..Wherein, suspension roof support mainly prevents wall-rock crack to expand by applying pretightning force to reach
Exhibition, improves the purpose of Surrounding Rock Strength and Drift stability；Because the features such as its easy construction, cheap, applied range compared with
It is conventional.
However, deep rock mass has put aside substantial amounts of energy in long-term tectonic movement, and the engineering such as explosion, excavation
It is movable then regional area Large strain can be caused to gather suddenly, and at the top of tunnel, shoulder and bottom etc. form high stress concentrations
Region, so that cause the unstable failure in tunnel；Using Coupled Rigid-flexible energy-absorbing support technology, effectively can shift and diffusion-induced stress
Concentrated area it is heavily stressed, be evenly distributed tunnel plastic zone stress field of the surrounding rock and displacement field, so as to improve country rock body
Tunnel safety performance under the Impact Load such as internal rupture and rock burst.
The content of the invention
The present invention for tunnel deep rock mass rupture and the Impact Load such as rock burst under energy and stress concentration and
A kind of the problems such as displacement deformation, there is provided Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel.
The technology is specially：In roadway excavation tunneling process, anchor net and anchor pole, anchor cable are arranged at the top of tunnel and two
Side, is connected by prestressed slab between the anchor net and anchor pole, anchor cable wherein at the top of tunnel；Then anchor pole and anchor cable are applied
High pretightening force, prestressed slab make high pretightening force distribution tend to uniform, improve the globality of support system；Subsequently injection element or steel are fine
Dimension concrete, in tunnel, drift angle and two is helped to use M steel band of model fixing anchor bars respectively.By high intensity anchor net, prestressed slab, anchor pole,
The comprehensive reinforced concrete structure that anchor cable, concrete and M steel band of model are formed collectively as energy-absorbing support system is improving tunnel top
Portion and two tensile strength helped, bending strength and rigidity, and bigger surrouding rock deformation is born, resist rock mass internal rupture and rock burst
Deng Impact Load.
Wherein, anchor cable is grouting cable anchor, and anchor net is diamond mesh, and anchor pole is screw thread energy-absorption anchor rod, squeezes into when anchor pole and encloses
After rock, anchor pole forms a common bearing structure with country rock, and its Design of Screw Thread can be such that rock mass leads to when by the impact load
The stretcher strain for crossing screw thread itself absorbs part energy.
Prestressed slab replaces connection by three sections of arcs and level board and constitutes, and is provided with anchor pole and anchor cable is logical in the middle of level board
Hole, prestressed slab two ends are end panel, are central flat in the middle of prestressed slab, length of the end panel length more than central flat
Degree.
Prestressed slab is hot rolled steel plate, the arc length of three sections of arc two ends circular arcs may be designed as 350 according to field condition～
450mm, the arc length of middle circular arc may be designed as 700～1000mm；Prestressed slab width may be designed as 200～300mm, and end is put down
Plate is respectively 250mm and 200mm with the length of central flat.The arc length of three sections of arc two ends circular arcs is shorter and radius is larger,
The arc length of middle circular arc is larger and radius is less.
Anchor net is formed by the rolling of 8# iron wires, and mesh is 35 × 35mm, with good elastic tension performance, when tunnel occurs
Collapse, the rock mass unstable phenomenon such as inbreak or wall caving when, certain pressure release buffering and string bag energy-absorbing can be played a part of.
M steel band of model itself has certain rigidity and good flexibility, can impact lotus in rock mass internal rupture and rock burst etc.
Load effect is lower to absorb a part of impact energy, so as to play certain buffering energy-absorbing function.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The present invention first passes through energy-absorption anchor rod and grouting cable anchor and injects cement mortar at rock mass internal voids, so as to by anchor pole
Around (anchor cable) drilling, fragmentation rock mass is cemented together；Then laying high-strength degree diamond mesh is adjacent to along inwall, spray afterwards
Plain (steel fibre) concrete, stops injection when concrete layer covers diamond mesh just.Press-in is helped with two at the top of tunnel
Three sections of pre-stressed steel plates, then apply pretightning force to the threaded anchor rod in three sections of prestress steel plate holes and grouting cable anchor, so as to change
The stress distribution of country rock has been apt to it, has improve the globality of country rock, plays good energy-absorbing supporting effect.With common coagulation
Native spray-up is compared, and the program substantially increases tensile strength, bending strength and the rigidity of structure, can bear bigger surrouding rock deformation
With cracking, and certain impact energy and load can be absorbed.At the drift angle of roadway's sides be often stress concentration region and split
The multiple area in line crack, herein, first squeezes into screw thread energy-absorption anchor rod, then re-lays pre-stressed steel plate, then with horizontal, longitudinal direction M
Steel band of model carries out drift angle reinforcement, as steel band itself also has certain rigidity and appropriate flexibility, so that screw thread energy-absorbing
Anchor pole, pre-stressed steel plate and M steel band of model define a more preferable endergonic structure.When back and two helps by the impact load
When, country rock absorbs part energy in itself, while being tied by the Coupled Rigid-flexible that energy-absorption anchor rod, prestressed slab and M steel band of model are constituted
Structure absorbs part energy, finally absorbs dump energy by diamond mesh, to play a part of energy-absorbing buffering.The present invention can be with
The stability of country rock is improved to a greater degree, is absorbed the Impact Load such as rock mass internal rupture and rock burst, is played security protection
Effect.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the cross-sectional structure schematic diagram of the present invention；
Fig. 3 is the prestressed slab top view of the present invention；
Fig. 4 is the prestressed slab profile of the present invention.
Wherein:1 anchor cable；2 anchor nets；3 anchor poles；4 M steel band of model；5 prestressed slabs；6 end panels；In 7
Between flat board；8 three sections of arcs；9 anchor poles and anchor cable through hole.
Specific embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
Energy and stress of the present invention for existing tunnel under the Impact Load such as deep rock mass rupture and rock burst
A kind of the problems such as concentration and displacement deformation, there is provided Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel.
As shown in Figure 1 to 4, prestressed slab of the present invention 5 is by the three sections of arcs 8 and level for being spaced connection successively
Plate is constituted, and number can be adjusted according to tunnel or chamber size；The two ends of the prestressed slab 5 are provided with end panel 6, in advance should
It is central flat 7 in the middle of power plate 5, end panel 6 and central flat 7 are provided with anchor cable and anchor pole through hole 9.
The width B of heretofore described prestressed slab 5 is 200～300mm, is chosen according to heading sizes, central flat 7
Length L4 is 200mm, and length L1 of end panel 6 is 250mm.
As shown in figure 4, according to field condition, heretofore described three sections of arcs, 8 concrete size may be designed as：Arc
Arc length L2 of two ends circular arc is 350～450mm, and arc radius R1 is 2200～2900mm, and correspondence arc angle θ 1 is 8～10 °；
Arc length L3 of middle circular arc is 700～1000mm, and arc radius R2 is 1300～1900mm, and arc angle θ 2 is 25～35 °；And
And 1/2≤R2/R1≤2/3.Anchor pole and anchor cable through hole 9 are located at the middle position of end panel 6 and central flat 7, diameter root
Factually border anchor pole, anchor cable are chosen.
Anchor cable 1 is grouting cable anchor, and anchor net 2 is diamond mesh, is formed by the rolling of 8# iron wires, and mesh is 35 × 35mm.Anchor
Bar 3 is screw thread energy-absorption anchor rod.
Three sections of arcs 8 of the present invention and level board are pressed into by five sections of hot rolled steel plate point is curved, using hot rolled steel plate just
In the support strength for improving prestressed slab.
Cement mortar is prepared：By water and 425# Portland cements according to weight 0.3:1～0.7:1 ratio is mixed
Proportioning is closed, high efficiency water reducing agent is subsequently adding, weight is about the 1.2%～2.4% of cement consumption.
Install：By taking certain the gold ore in deep exploitation of Sanmenxia City Lingbao City of Henan Province area as an example, tunnel width 4m, prestressed slab 5
Width B is chosen for 250mm, and arc length L2 of three sections of arc two ends circular arcs is 400mm, and arc radius R1 is 2600mm, corresponding to justify
Arc angle θ 1 is 9 °；Arc length L3 of middle circular arc is 840mm, and R2 is 1600mm, and correspondence arc angle θ 2 is 30 °.First, according to
Tunnel lithology and supporting are required, it is determined that appropriate roadway layout position.Drilling construction is carried out to roadway surrounding rock with post drill,
And grouting cable anchor 1 is squeezed into along drilling, position is squeezed into at the top of tunnel, bore diameter 32mm, hole depth 5600mm, exposure length
180mm.Anchor pole 3 is then mostly installed at the top board in tunnel, two helps with footing, and bore diameter 32mm wherein top and two helps hole
Deep 2000mm, footing hole depth 2400mm, exposure length 120mm.There is rupture spillage phenomenon to prevent anchor shaft anchor cable, installing
During, anchor pole 3 and anchor cable 1 should be noted that guarantee anchor shaft anchor cable is squeezed into straight along drilling, and substantially bending should not occur.During slip casting
From bottom to top, symmetrical slip casting；Wherein help, with the slip casting of base plate boundary, the groove of 250mm need to be excavated two, by unnecessary slurry
Draw；During using bolt grouting, grouting pressure is not more than 3MPa, is not more than 5MPa using grouting pressure during grouting cable anchor.Slip casting
After the completion of, diamond mesh (anchor net 2) is adjacent to into arrangement along tunnel inwall, then the diamond-type metal mesh portions under roadway surrounding rock are sprayed
Penetrate plain (or steel fibre) concrete tentatively to be strengthened, jet thickness is with closing metal net layer.Treat that concrete coagulation is dried
Afterwards, in its underpart prestressed plate 5, horizontal, longitudinal direction M steel band of model 4 is installed and nut is tightened on anchor shaft anchor cable in drift angle and compress
Prestressed slab 5, forms " prestressing force mechanism " (see Fig. 1).
At the construction field (site), what tunnel plastic zone country rock was carried out is the active support of anchor net to the present invention.Diamond mesh elder generation
Be close to roadway surrounding rock, one layer concrete layer of fill-before-fire, this scheme substantially increase the tensile strength of superstructure, bending strength and
Rigidity.Diamond mesh is to be rolled to form by iron wire, not only there is to roadway surrounding rock after paving tensioning good shield table to support and make
With, and generation can be bloated with country rock in the dynamic impact load action such as rock mass internal rupture and rock burst and " take advantage of a situation " displacement, rise
Buffer and string bag energy-absorbing function to certain pressure that allows.Simultaneously totally enclosed shield table wire netting be also prevented from country rock roof fall, wall caving,
During avalanche, sillar launches the generation of casualty accident.While energy-absorption anchor rod (rope) is squeezed in hole, prestressed slab is applied to country rock
Higher squeezing action is added so as to bigger surrouding rock deformation and cracking can be born, with higher deformation adaptability.In advance
Stress plate provides the constraint being more uniformly distributed to anchor net jointly with M steel band of model, greatly enhances the stability of structure, rises
To the effect of security protection.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel, it is characterised in that：Tunneled in roadway excavation
Anchor net (2) and anchor pole (3), anchor cable (1) are arranged at the top of tunnel and two are helped by Cheng Zhong, the anchor net (2) and anchor wherein at the top of tunnel
Connected by prestressed slab (5) between bar (3), anchor cable (1)；Then high pretightening force is applied to anchor pole (3) and anchor cable (1),
Prestressed slab (5) makes high pretightening force distribution tend to uniform, improves the globality of support system；Element or steel fibre coagulation are sprayed subsequently
Soil, in tunnel, drift angle and two is helped to use M steel band of model (4) fixing anchor bar (3) respectively.
2. the Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel according to claim 1, it is characterised in that：Institute
It is grouting cable anchor to state anchor cable (1), and anchor net (2) is diamond mesh, and anchor pole (3) is screw thread energy-absorption anchor rod.
3. the Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel according to claim 1, it is characterised in that：Institute
Alternately connection is constituted by three sections of arcs (8) and level board to state prestressed slab (5), is provided with anchor pole and anchor cable through hole in the middle of level board
(9), prestressed slab (5) two ends are for central flat (7), end panel (6) length in the middle of end panel (6), prestressed slab (5)
More than the length of central flat (7).
4. the Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel according to claim 1 or 3, its feature exist
In：Described prestressed slab (5) are hot rolled steel plate, and the arc length of three sections of arc (8) two ends circular arcs is designed as 350 according to field condition
～450mm, the arc length of middle circular arc are designed as 700～1000mm.
5. the Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel according to claim 1 or 3, its feature exist
In：Prestressed slab (5) width is that the length of 200～300mm, end panel (6) and central flat (7) is respectively 250mm
And 200mm.
6. the Coupled Rigid-flexible energy-absorbing support technology for being suitable to deep mining tunnel according to claim 1, it is characterised in that：Institute
State anchor net (2) to be formed by the rolling of 8# iron wires, mesh is 35 × 35mm.
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| CN201610854612.6A CN106523003A (en) | 2016-09-27 | 2016-09-27 | Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795322A (en) * | 2017-11-06 | 2018-03-13 | 山东建筑大学 | A kind of assembly concrete arc plate and checkerboard type prestress anchorage cable composite supporting construction and its construction method |
| CN108571336A (en) * | 2018-06-08 | 2018-09-25 | 北京科技大学 | A kind of energy-absorbing backing plate suitable for deep mining tunnel |
| CN109488353A (en) * | 2018-10-23 | 2019-03-19 | 新汶矿业集团有限责任公司 | A kind of stope advance support system and method |
| CN110344854A (en) * | 2019-07-24 | 2019-10-18 | 辽宁工程技术大学 | Press laneway support method to a kind of thump |
| CN110344841A (en) * | 2019-07-22 | 2019-10-18 | 周俊满 | A kind of anchor rete cord shape steel bracket coupling supporting structure |
| CN110513129A (en) * | 2019-09-26 | 2019-11-29 | 黄祖军 | A kind of loose thick coal layer roadway workface fore-support supporting construction and method for protecting support |
| CN112444207A (en) * | 2020-11-19 | 2021-03-05 | 北京科技大学 | Roadway surface displacement monitoring device and method for area multipoint continuous measurement |
| CN113704861A (en) * | 2021-10-22 | 2021-11-26 | 中国矿业大学(北京) | Deep roadway energy-absorbing support design method and system |
| CN114483086A (en) * | 2022-04-01 | 2022-05-13 | 中国矿业大学(北京) | Energy-absorbing composite supporting system for protective tunnel |
| CN116499879A (en) * | 2023-06-26 | 2023-07-28 | 中国矿业大学(北京) | Underground engineering surrounding rock energy test and rock burst energy absorption control method |
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