CN209040870U - 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system - Google Patents
3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system Download PDFInfo
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- CN209040870U CN209040870U CN201821903515.2U CN201821903515U CN209040870U CN 209040870 U CN209040870 U CN 209040870U CN 201821903515 U CN201821903515 U CN 201821903515U CN 209040870 U CN209040870 U CN 209040870U
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 65
- 239000011435 rock Substances 0.000 title claims abstract description 28
- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 238000004873 anchoring Methods 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000007569 slipcasting Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000012407 engineering method Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram 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
- 230000036316 preload Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system, including depth supporting construction and peripheral surface supporting construction；Depth supporting construction includes several 3rd area collaboration supporting assembled bolts；3rd area cooperate with supporting assembled bolt along tunnel top plate, two help to be arranged circumferentially and with bottom plate through anchoring rupture zone, plastic zone and elastic region；Peripheral surface supporting construction includes girder steel, metal mesh and concrete hardening layer, and girder steel and metal mesh cooperate the top plate along tunnel, two to help to carry out supporting, and concrete hardening layer is laid on the bottom plate in tunnel." rupture zone, plastic zone and elastic region " three regions are combined into an entirety by the utility model, effectively increase the integrated carrying ability and non-deformability of roadway surrounding rock, it is possible to prevente effectively from rupture zone or collapsing for plastic zone appearance emit phenomenon, give full play to the bearing capacity of elastic region, it is ensured that the stability of roadway surrounding rock.
Description
Technical field
The utility model belongs to mine support engineering cable bolting technical field, and in particular to association, 3rd area of breaking surrounding rock tunnel
With coupling supporting system.
Background technique
In colliery tunnel support engineering, cable bolting is the common type of roof timbering.The common anchor cable of coal mine is 7 strands
Or 19 strands of strand structure, common anchor cable diameter are 15.2mm, 17.8mm, 20mm, 22mm.Compared with suspension roof support, anchor
Rigging has the advantages that intensity is big, length is big, and anchor cable can anchor to top plate deep and stablize in rock stratum, therefore cable bolting is to top plate
Stability control has remarkable effect.But with the gradually exploitation of coal resources, roadway surrounding rock ambient stress runs down,
In roadway with large deformation, weak surrounding rock tunnel and high stress workings subject to dy namic pressure, anchor cable fracture problem is increasingly prominent.Some complicated tired
Under the conditions of difficulty, even also there is fracture in the high-strength anchor cable of some diameter 22mm.Field observation shows that the position of anchor cable fracture is equal
Occur close to first 1/3 section of aperture, or the shearing changing of the relative positions rock stratum bed plane at；From the point of view of fracture morphology, anchor cable is " to cut
Destroy and pull open bad " fracture under collective effect.To find out its cause, current cable bolting is primarily present, " stress raisers, steel are twisted
Line is defeated in detail under the drawing effect of cutting and is broken by root (stock) " technical problem, how to improve the anti-of anchor cable stress collection middle section
The globality of tensile strength, shearing strength and steel strand wires becomes the critical issue for solving anchor cable fracture.
Utility model content
The utility model is of the existing technology to overcome the problems, such as, provides a kind of 3rd area of breaking surrounding rock tunnel collaboration coupling branch
Protecting system, it is intended to cooperate with coupling supporting technology by 3rd area for roadway surrounding rock " rupture zone, plastic zone and elastic region ", effectively
Solve it is existing in the prior art " three area's relevances are poor, top plate two is helped and bottom plate relevance is poor, grouted anchor bar length is short, rupture
Area and plastic zone, which easily collapse, to be emitted " etc. technical problems.
To achieve the above object, the utility model uses following technical scheme:
3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system, including depth supporting construction and peripheral surface supporting construction；
Depth supporting construction includes several 3rd area collaboration supporting assembled bolts, and 3rd area are rupture zone, plastic zone
And elastic region, it is rupture zone close to tunnel, is plastic zone on the inside of rupture zone, is elastic region on the inside of plastic zone；3rd area collaboration branch
Shield assembled bolt along tunnel top plate, two help to be arranged circumferentially and with bottom plate through anchoring rupture zone, plastic zone and elasticity
Area；
Peripheral surface supporting construction includes girder steel, metal mesh and concrete hardening layer, and girder steel and metal mesh cooperation are along tunnel
Top plate, two help to carry out supporting, concrete hardening layer is laid on the bottom plate in tunnel.
It includes the screw-thread steel body of rod, connecting tube, hollow lever, pallet and nut, screw-thread steel that 3 area, which cooperate with supporting assembled bolt,
The outer end of the body of rod is connected as one by the way that the inner end of connecting tube and hollow lever is coaxial, several notes are offered on hollow lever
Hole is starched, is anchored in elastic region by resin anchoring agent for one section on the inside of the screw-thread steel body of rod, the screw thread steel pole being anchored in elastic region
This section of body is known as elastic region anchoring section, has annular gap between plastic zone for one section on the outside of the screw-thread steel body of rod, between annular
One section of screw-thread steel body of rod in gap is known as plastic zone free segment, and hollow lever is located in rupture zone, and water is injected in hollow lever
Mud, cement slurry are injected into rupture zone by the injected hole on hollow lever, this section of cement slurry in rupture zone is known as
Rupture zone slip casting section；Pallet is set on hollow lever outer end and is pressed on girder steel and/or metal mesh, during nut thread is connected to
Empty body of rod outer end and with pallet compression fit.
The connecting tube is interior thin outer thick reducer pipe, and the outer diameter of hollow lever is greater than the outer diameter of the screw-thread steel body of rod, screw thread
The outer end of steel pole body and hollow lever inner end are threadedly coupled with the inner port of connecting tube and external port respectively.
By adopting the above technical scheme, the construction method of 3rd area of breaking surrounding rock tunnel collaboration coupling supporting system, including it is following
Construction procedure:
(1) according to tunnel working condition and geomechanical condition, usage and the length of service, tunnel section design is determined
Parameter, including fracture morphology and its size；
(2) it is determined based on tunnel section design parameter using theory analysis, numerical simulation and engineering method of investigation and study
Back, two help and the rupture zone of bottom plate, plastic zone, the boundary of elastic region and range；
(3) it is helped and peripherally outwardly extending three regions of bottom plate for back, two: rupture zone, plastic zone, elasticity
Area, using 3rd area collaboration supporting assembled bolt by rupture zone, plastic zone and elastic region be together in series and complexed metal net, girder steel into
Row active support forms and is directed to the trizonal Coupled load structure interknited；By top plate, two are helped and bottom plate use
3rd area cooperate with supporting assembled bolt complexed metal net, girder steel to carry out active support, form the closed Coupled load interknited
Circle.
The Specific construction process of step (3) is,
The first, according to tunnel productive geological conditions and top plate, two help and " rupture zone, plastic zone, the elasticity of bottom plate
The trizonal boundary in area " and range, determine top plate, two help and bottom plate used by 3rd area collaboration supporting assembled bolt material
Matter, diameter, length, the specification and dosage of resin anchoring agent and the position of assembled bolt and therebetween array pitch；
The second, the position according to 3rd area collaboration supporting assembled bolt and array pitch therebetween, set bolthole using jumbolter；
Third is connected the front end of the rear end of the screw-thread steel body of rod and hollow lever using connecting tube, and uses screw thread
Resin anchoring agent is sent into the bottom hole of bolthole by the front end of steel pole body, and is stirred using drilling machine to resin anchoring agent, is formed
Elastic region anchoring section；
4th, after the completion of resin anchoring agent anchoring, metal mesh and girder steel is laid with and pallet and nut are installed, and nut is pressed
It is pre-tightened according to design torque, active support is carried out to country rock；
5th, slip casting is carried out using hollow lever of the slip casting equipment to 3rd area collaboration supporting assembled bolt, forms rupture zone
Slip casting section；
After the completion of six, the three areas cooperate with the construction of supporting assembled bolt, the bottom slab concreting concrete in tunnel is carried out at hardening
Reason.
The length of the 3rd area collaboration elastic region anchoring section of supporting assembled bolt, plastic zone free segment and rupture zone slip casting section is answered
It is determined according to the range of roadway surrounding rock rupture zone, plastic zone and elastic region.
Top plate, two help and bottom plate used by 3rd area collaboration supporting assembled bolt specification, including elastic region anchoring section, modeling
The length of property area's free segment and rupture zone slip casting section, should help and the rupture zone of bottom plate, plastic zone and elastic region according to top plate, two
Range determines；By top plate, two are helped and bottom plate using 3rd area cooperate with supporting assembled bolt complexed metal net, girder steel carry out actively
Supporting, the closed Coupled load circle that formation is helped by top plate, two and bottom plate forms.
In conclusion the utility model has the following beneficial effects:
1) coupling supporting technology is cooperateed with by using 3rd area for " rupture zone, plastic zone and elastic region ", it will " rupture
The region of area, plastic zone and elastic region " three is combined into an entirety, effectively increases the integrated carrying ability of roadway surrounding rock and resists
Deformability, it is possible to prevente effectively from rupture zone or collapsing for plastic zone appearance emit phenomenon；
2) by using " 3rd area cooperate with supporting assembled bolt ", " rupture zone, plastic zone and elastic region " can be connected
Come, effectively improves the overall stability of country rock: rupture can effectively be reinforced by the slip casting to assembled bolt rupture zone slip casting section
The bearing capacity and deformation resistance of rupture zone are improved in area；It, not only can be with by the preload to assembled bolt plastic zone free segment
It realizes the active support to country rock, and makes full use of the elongation percentage of the body of rod；By using resin anchoring to elastic region anchoring section
Assembled bolt can be anchored to elastic region and stablized in rock stratum by agent anchoring, can give full play to the bearing capacity of elastic region.
3) it by being helped to top plate, two and bottom plate using 3rd area cooperates with supporting combined bolt support technology, not only increases " broken
The region entirety stability of split plot, plastic zone and elastic region " three and relevance, and form and helped for top plate, two and bottom plate
Closed Coupled load circle, effectively prevent tunnel occur " local failure → destruction extension → tunnel unstability " unstability mould
Formula, it is ensured that the stability of roadway surrounding rock.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
3rd area Tu2Wei cooperates with the structure of supporting combined bolt support to use figure；
Appended drawing reference is respectively as follows: 1 for tunnel in figure, and 2 be top plate, and 3 help for two, and 4 be bottom plate, and 5 be rupture zone, and 6 be plasticity
Area, 7 be elastic region, and 8 cooperate with supporting assembled bolt for 3rd area, and 9 be metal mesh, and 10 be girder steel, and 11 be concrete hardening layer, and 12 are
Elastic region anchoring section；13 be plastic zone free segment；14 be rupture zone slip casting section；15 be the screw-thread steel body of rod；16 be injected hole；17 are
Hollow lever；18 be pallet；19 be nut；20 be resin anchoring agent；21 be connecting tube；22 be bolthole.W is head-room, G
For span length.
Specific embodiment
As depicted in figs. 1 and 2, specific embodiment of the present invention is as follows:
3rd area of breaking surrounding rock tunnel of the utility model cooperates with coupling supporting system, including depth supporting construction and circumferential table
Face supporting construction；
Depth supporting construction includes several 3rd area collaboration supporting assembled bolts 8, and 3rd area are rupture zone 5, plasticity
Area 6 and elastic region 7 are rupture zone 5 close to tunnel 1, are plastic zone 6 on the inside of rupture zone 5, are elastic region 7 on the inside of plastic zone 6；
3rd area cooperate with top plate 2, two of the supporting assembled bolt 8 along tunnel 1 help 3 and bottom plate 4 be arranged circumferentially and through anchoring rupture
Area 5, plastic zone 6 and elastic region 7；
Peripheral surface supporting construction includes girder steel 10, metal mesh 9 and concrete hardening layer 11, and girder steel 10 and metal mesh 9 are matched
It closes the top plate 2, two along tunnel 1 and helps 3 carry out supportings, concrete hardening layer 11 is laid on the bottom plate 4 in tunnel 1.
It includes the screw-thread steel body of rod 15, connecting tube 21, hollow lever 17, pallet 18 and spiral shell that 3 area, which cooperate with supporting assembled bolt 8,
Mother 19, the outer end of the screw-thread steel body of rod 15 are connected as one by the way that the inner end of connecting tube 21 and hollow lever 17 is coaxial, hollow stem
Several injected holes 16 are offered on body 17, one section of 15 inside of the screw-thread steel body of rod is anchored at elastic region 7 by resin anchoring agent 20
Interior, the screw-thread steel body of rod 15 this section being anchored in elastic region 7 is known as elastic region anchoring section 12,15 one section of outside of the screw-thread steel body of rod
There is annular gap between plastic zone 6, one section of screw-thread steel body of rod 15 in annular gap is known as plastic zone free segment 13, in
The empty body of rod 17 is located in rupture zone 5, and cement slurry is injected in hollow lever 17, and cement slurry passes through the injected hole on hollow lever 17
16 are injected into rupture zone 5, this section of cement slurry in rupture zone 5 is known as rupture zone slip casting section 14；During pallet 18 is set on
Empty 17 outer end of the body of rod is simultaneously pressed on girder steel 10 and/or metal mesh 9, nut 19 be threaded in 17 outer end of hollow lever and with support
18 compression fit of disk.
The connecting tube 21 is interior thin outer thick reducer pipe, and the outer diameter of hollow lever 17 is greater than the outer of the screw-thread steel body of rod 15
Diameter, the outer end of the screw-thread steel body of rod 15 and 17 inner end of hollow lever connect with the inner port of connecting tube 21 and external port screw thread respectively
It connects.
1st three area of breaking surrounding rock tunnel cooperates with the construction method of coupling supporting system, including following construction procedure:
(1) according to 1 working condition of tunnel and geomechanical condition, usage and the length of service, determine that 1 section of tunnel is set
Count parameter, including fracture morphology and its size；1 section of tunnel is rectangle, and lanewidth is W meters, and lane is G meters a height of；
(2) it is determined based on 1 section design parameter of tunnel using theory analysis, numerical simulation and engineering method of investigation and study
1 top plate 2, two of tunnel helps rupture zone 5, plastic zone 6, the boundary of elastic region 7 and the range of 3 and bottom plate 4；
(3) 3 and 4 peripherally outwardly extending three regions of bottom plate: rupture zone 5, plastic zone are helped for 1 top plate 2, two of tunnel
6, rupture zone 5, plastic zone 6 and elastic region 7 are together in series and gold conjugate by elastic region 7 using 3rd area collaboration supporting assembled bolt 8
Belong to net 9, the progress active support of girder steel 10, is formed and be directed to the trizonal Coupled load structure interknited；By to top plate
2, two help 3 and bottom plate 4 using 3rd area collaboration 8 complexed metal net 9 of supporting assembled bolt, girder steel 10 carry out active support, formed envelope
The Coupled load circle interknited closed.
The Specific construction process of step (3) is,
The first, according to tunnel 1 productive geological conditions and top plate 2, two help 3 and bottom plate 4 " rupture zone 5, plastic zone 6,
The trizonal boundary in elastic region 7 " and range determine that top plate 2, two helps the collaboration of 3rd area used by 3 and bottom plate 4 supporting combination anchor
Material, diameter, the length of bar 8, the specification and dosage of resin anchoring agent 20 and the position of assembled bolt and therebetween array pitch；
The second, the position according to 3rd area collaboration supporting assembled bolt 8 and array pitch therebetween, set bolthole using jumbolter
22；
The front end of the rear end of the screw-thread steel body of rod 15 and hollow lever 17 is connected using connecting tube 21, and adopted by third
Resin anchoring agent 20 is sent into the bottom hole of bolthole 22 with the front end of the screw-thread steel body of rod 15, and using drilling machine to resin anchoring agent 20
It is stirred, forms elastic region anchoring section 12；
4th, after the completion of resin anchoring agent 20 anchors, metal mesh 9 and girder steel 10 is laid with and pallet 18 and nut 19 are installed,
And nut 19 is pre-tightened according to design torque, active support is carried out to country rock；
5th, slip casting is carried out using hollow lever 17 of the slip casting equipment to 3rd area collaboration supporting assembled bolt 8, forms rupture
Area's slip casting section 14；
After the completion of six, the three areas cooperate with supporting assembled bolt 8 to construct, 4 casting concrete of bottom plate in tunnel 1 is hardened
Processing.
Elastic region anchoring section 12, plastic zone free segment 13 and the rupture zone slip casting section 14 of 3 area collaboration supporting assembled bolt 8
Length should according to 1 broken rock zone 5 of tunnel, plastic zone 6 and the range of elastic region 7 determine.
Top plate 2, two helps the specification of the collaboration of 3rd area used by 3 and bottom plate 4 supporting assembled bolt 8, including elastic region anchoring
Section 12, the length of plastic zone free segment 13 and rupture zone slip casting section 14, should be helped according to top plate 2, two 3 and bottom plate 4 rupture zone 5,
The range of plastic zone 6 and elastic region 7 determines；By helping 3 and the use of bottom plate 4 3rd area collaboration supporting assembled bolt 8 to top plate 2, two
Complexed metal net 9, girder steel 10 carry out active support, are formed and help 3 and the closed Coupled load that forms of bottom plate 4 by top plate 2, two
Circle.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (3)
1. 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system, it is characterised in that: including depth supporting construction and peripheral surface
Supporting construction；
Depth supporting construction includes several 3rd area collaboration supporting assembled bolts, and 3rd area are rupture zone, plastic zone and bullet
Property area, be rupture zone close to tunnel, be plastic zone on the inside of rupture zone, be elastic region on the inside of plastic zone；3rd area cooperate with supporting group
Close anchor pole along tunnel top plate, two help to be arranged circumferentially and with bottom plate through anchoring rupture zone, plastic zone and elastic region；
Peripheral surface supporting construction includes girder steel, metal mesh and concrete hardening layer, and girder steel and metal mesh cooperate along the top in tunnel
Plate, two help to carry out supporting, and concrete hardening layer is laid on the bottom plate in tunnel.
2. 3rd area of breaking surrounding rock tunnel as described in claim 1 cooperates with coupling supporting system, it is characterised in that: 3rd area collaboration branch
Protecting assembled bolt includes the screw-thread steel body of rod, connecting tube, hollow lever, pallet and nut, and the outer end of the screw-thread steel body of rod passes through connection
Pipe with the inner end of hollow lever is coaxial is connected as one, several injected holes are offered on hollow lever, in the screw-thread steel body of rod
One section of side is anchored in elastic region by resin anchoring agent, and the screw-thread steel body of rod this section being anchored in elastic region is known as elastic region
Anchoring section, one section of screw-thread steel body of rod outside have annular gap, one section of screw thread steel pole in annular gap between plastic zone
Body is known as plastic zone free segment, and hollow lever is located in rupture zone, and cement slurry is injected in hollow lever, and cement slurry passes through hollow
Injected hole on the body of rod is injected into rupture zone, this section of cement slurry in rupture zone is known as rupture zone slip casting section；Pallet is worn
It covers in hollow lever outer end and is pressed on girder steel and/or metal mesh, nut thread is connected to hollow lever outer end and and pallet
Compression fit.
3. 3rd area of breaking surrounding rock tunnel as claimed in claim 2 cooperates with coupling supporting system, it is characterised in that: the connecting tube
For interior thin outer thick reducer pipe, the outer diameter of hollow lever is greater than the outer diameter of the screw-thread steel body of rod, and the outer end of the screw-thread steel body of rod is in
Empty body of rod inner end is threadedly coupled with the inner port of connecting tube and external port respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821903515.2U CN209040870U (en) | 2018-11-19 | 2018-11-19 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821903515.2U CN209040870U (en) | 2018-11-19 | 2018-11-19 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209040870U true CN209040870U (en) | 2019-06-28 |
Family
ID=67042792
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821903515.2U Withdrawn - After Issue CN209040870U (en) | 2018-11-19 | 2018-11-19 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system |
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| Country | Link |
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| CN (1) | CN209040870U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252882A (en) * | 2018-11-19 | 2019-01-22 | 河南理工大学 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system and its construction method |
-
2018
- 2018-11-19 CN CN201821903515.2U patent/CN209040870U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252882A (en) * | 2018-11-19 | 2019-01-22 | 河南理工大学 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system and its construction method |
| CN109252882B (en) * | 2018-11-19 | 2024-03-15 | 河南理工大学 | Three-region cooperative coupling supporting system for broken surrounding rock roadway and construction method of three-region cooperative coupling supporting system |
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