CN110939475B - Temporary support system and support method for roof anchor rod of coal mine tunnel - Google Patents
Temporary support system and support method for roof anchor rod of coal mine tunnel Download PDFInfo
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- CN110939475B CN110939475B CN201911343170.9A CN201911343170A CN110939475B CN 110939475 B CN110939475 B CN 110939475B CN 201911343170 A CN201911343170 A CN 201911343170A CN 110939475 B CN110939475 B CN 110939475B
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- 239000003245 coal Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005641 tunneling Effects 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005065 mining Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010878 waste rock Substances 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
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- 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
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- 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)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a temporary support system and a temporary support method for roof bolts of a coal mine tunnel, which relate to the technical field of tunnel support and comprise a temporary tray, a temporary nut and a top protection type front cantilever, wherein the temporary tray comprises a plane tray and a U-shaped handle, and the plane tray is provided with a U-shaped opening; the rubber pad of the temporary nut is arranged on the inner side of the clamping groove, and the clamping groove I and the clamping groove II are matched through plugging, so that the clamping groove is fixedly connected through the high-strength magnet; the front cantilever of the top protection type front cantilever is connected with the top protection device through a lock page; during tunnel tunneling construction, firstly hanging a top protection type front cantilever, installing an anchor rod, a temporary tray and a temporary nut at the tunneling head, continuing tunneling, dismantling the temporary tray and the temporary nut, overlapping anchor net sheets, closing the top protection device, moving the top protection type front cantilever forward, and installing the nut tray for permanent support; the technical problem that the hanging net top protection effect is poor due to repeated disassembly of the tray and the nuts is solved, and the temporary support efficiency of the coal mine tunnel is improved.
Description
Technical Field
The invention relates to the technical field of mine roadway support, in particular to a temporary support system and a temporary support method for roof bolts in a coal mine roadway, which are applied to a roof prone to falling.
Background
As the mining depth of the western mining area is continuously increased, the problems encountered in the support of the mine tunnel are also increased, and as most rock layers of the western mining area are weak cementing soft rock, the influence on the tunnel tunneling support is not obvious during shallow mining, and roof caving phenomenon easily occurs during tunnel tunneling after the mining area enters the middle-deep part, so that the tunnel tunneling efficiency is severely restricted.
The anchor rod (rope) combined supporting technology is mostly adopted in the roadway, the anchor rod and the anchor net are used for supporting in time, the anchor rod and the anchor net are one of effective means for effectively preventing and controlling the roof from falling off, the anchor rod is hung in time when being installed, the anchor net is guaranteed to be tightly attached to the wall surface of the roof, the anchor net plays a certain supporting role on the roof, and the roof is prevented from being on a large scale and empty. In order to ensure the timely roof protection effect, the anchor rod nut tray is used for fastening the net sheet on site, net sheet lap joint is carried out after the roadway is driven continuously, and the anchor rod nut tray positioned in the lap joint area is dismounted, taken out and tightly pressed in the two net sheet lap joint areas and then fastened again. Because the front row of anchor rods are arranged at two net piece lap joint positions, the net piece is tightly adhered to the wall surface by adopting a nut and tray fastening mode, the nut and tray repeated disassembly and installation processes exist in the net piece lap joint process, the repeated disassembly has great influence on the top plate, the small broken top plate is easy to fall off to hurt people, the process is complex, and the normal tunneling of a roadway is influenced; therefore, further improvements to existing temporary support systems and support methods are needed.
Disclosure of Invention
In order to solve the technical problem that the hanging net roof protection effect is poor due to repeated disassembly of a tray and nuts during supporting of a roadway in an area of a top plate which is prone to falling, the efficiency of temporary supporting of a coal mine roadway is improved, and roof protection is effectively and timely achieved, the invention provides a coal mine roadway roof anchor rod temporary supporting system and a supporting method, and the concrete technical scheme is as follows.
The temporary support system for the roof bolt of the coal mine tunnel comprises a temporary tray, a temporary nut and a top protection type front cantilever, wherein the temporary tray and the temporary nut are arranged at the lap joint of an anchor net sheet and are arranged on the anchor bolt; the temporary tray comprises a plane tray and a U-shaped handle, a U-shaped opening is formed in the plane tray, and the U-shaped handle is fixed on the opposite side of the U-shaped opening side of the plane tray; the temporary nut comprises a rubber pad, a high-strength magnet, a clamping groove I and a clamping groove II, wherein the rubber pad is arranged on the inner sides of the clamping groove I and the clamping groove II, the clamping groove I and the clamping groove II are matched through plugging, and the high-strength magnet is arranged at the plugging position of the clamping groove I and the clamping groove II; the top protection type front cantilever comprises a front cantilever, a lock page and a top protection device, wherein the front cantilever is connected with the top protection device through the lock page, the front cantilever is fixed on a top plate through a hanging ring, the lock page limits the rotation range of the top protection device to 0-90 degrees, and the top protection device is of an elastic telescopic structure.
Preferably, the U-shaped opening of the temporary tray is from the center of the tray to the edge of the tray, the width of the U-shaped opening is equal to the diameter of the anchor rod, and the obtuse included angle of the plane tray and the U-shaped handle is 120-150 degrees.
It is also preferable that the inner surface and the outer surface of the rubber pad of the temporary nut are both provided with threads, the threads on the inner surface of the rubber pad are matched with the anchor rod, and the threads on the outer surface of the rubber pad are matched with the clamping groove; the clamping groove I is provided with a protruding part, and the clamping groove II is provided with a recessed part; the high-strength magnet is arranged at the positions of the protruding part and the recessed part.
Still preferably, the lock leaf respectively with preceding cantilever beam, overhead guard welded fastening, overhead guard includes outer tube, interior sleeve pipe, spring and switch pin, interior sleeve pipe sets up in the outer tube, is provided with the spring in the outer tube, spring coupling outer tube bottom and interior sheathed tube bottom, the switch pin sets up on the lateral wall of outer tube.
The temporary support method for the roof bolt of the coal mine tunnel utilizes the temporary support system for the roof bolt of the coal mine tunnel, and comprises the following construction steps:
step A, after a roadway is tunneled, hanging a roof protection type front cantilever on a roadway top plate behind a tunnelling head, rotating a roof protection device by 90 degrees to support the roadway top plate, and installing an anchor rod on the tunnelling head-on side;
step B, installing a temporary tray and a temporary nut on an anchor rod installed on the head-on side of tunneling to form a temporary support area;
step C, continuously tunneling a tunnel, removing a temporary tray and temporary nuts, and overlapping anchor net sheets in a temporary support area;
d, rotating the top protection device to be parallel to the front cantilever, and moving the top protection front cantilever forward;
E, rotating the top protection device by 90 degrees to support the top plate, and permanently supporting the temporary supporting area through nuts and a tray;
and F, continuously tunneling the tunnel, and repeating the steps A to E until the permanent support of the whole tunnel is completed.
It is further preferable that the U-shaped opening of the planar tray faces the heading head direction when the temporary tray is installed, and the anchor rod is clamped in the center of the planar tray; when the temporary tray is removed, the U-shaped handle is gripped to rapidly withdraw the temporary tray along the U-shaped opening.
It is further preferable that when the temporary nut is installed, the rubber pad is wrapped on the anchor rod section adjacent to the temporary tray, and then the clamping groove I and the clamping groove II are fastened on the rubber pad, and the high-strength magnet is used for fastening the clamping groove I and the clamping groove II; and when the temporary nut is detached, the clamping groove I and the clamping groove II are directly broken off, and the rubber pad is taken down.
It is further preferable that the top protection type front cantilever is hung on the top plate through a hanging ring, and the top protection device is arranged on one side close to the tunneling head; when the top protection device and the front cantilever form a right angle, the switch pin top protection device is opened to extend.
The beneficial effects of the invention are as follows:
(1) The utility model provides a colliery tunnel roof stock temporary support system utilizes interim tray and interim nut combination to realize the quick fitment of stock tray, combines the timely roof protection of roof-protecting type cantilever, has improved the effect of hanging net roof protection in the stock temporary support process, has avoided dismantling the problem of nut and tray repeatedly.
(2) The temporary tray of the system is disassembled and assembled through the handle, so that the operation is more convenient, the construction is simplified, and the working efficiency is improved; the temporary nut prevents the nut formed by the clamping grooves from falling through the rubber pad, so that the friction force between the anchor rod and the temporary nut is increased, the high-strength magnet ensures the fastening function of the nut, and meanwhile, the temporary nut is convenient to detach; the top protection device of the top protection type front cantilever guarantees the close contact between the anchor net sheet and the top plate, can provide a certain supporting force and plays a role in supporting the top plate.
(3) According to the temporary support method for the roof bolt of the coal mine tunnel, the characteristics of a roof which is easy to fall are considered, the roof after tunneling is supported timely through the roof protection type front cantilever, the temporary tray and the temporary nut are used for rapidly fixing the roof bolt, and then the temporary tray and the temporary roof bolt are rapidly and conveniently detached when the temporary support area is overlapped with the anchor net sheet; the roof-protecting type front cantilever is moved forward along with the pushing circulation of the working face, so that the installation of the anchor rod nut and the tray is completed, and the permanent support of the roadway is realized.
Drawings
FIG. 1 is a schematic view of a temporary pallet structure;
FIG. 2 is a schematic diagram of the structure of the clamping groove I;
FIG. 3 is a schematic diagram of a structure of a clamping groove II;
FIG. 4 is a schematic view of a temporary nut construction;
FIG. 5 is a schematic view of a roof-top style front canopy;
FIG. 6 is a schematic view of the construction of the roof guard;
FIG. 7 is a schematic view of another construction of a roof guard;
FIG. 8 is a schematic view of a temporary support structure for roof bolts of a coal mine roadway;
FIG. 9 is a schematic cross-sectional view of the lane A-A of FIG. 8;
FIG. 10 is a schematic cross-sectional view of the B-B roadway of FIG. 8;
In the figure: 1-a temporary pallet; 11-a planar tray; 12-U-shaped handles; 2-a temporary nut; 21-a rubber pad; 22-high-strength magnets; 23-clamping groove I; 24-clamping groove II; 3, roof-protecting type front cantilever; 31-front cantilever; 32-locking pages; 33-a roof guard; 331-outer sleeve; 332-inner sleeve; 333-a spring; 334—a switch pin; 335-a stop; 34-hanging rings; 4-an anchor rod tray; 5-anchor rod nuts; 6-anchor rod; 7-anchoring net pieces.
Detailed Description
Referring to fig. 1 to 10, the embodiment of the temporary support system and the support method for the roof bolt of the coal mine tunnel provided by the invention is as follows.
After tunneling, the anchor net sheet is needed to be overlapped, if a front cantilever is adopted for supporting, the anchor net at the front part is supported and controlled after the front cantilever extends out; the anchor rod nuts and the trays positioned in the overlapping area are detached and taken out, and the nuts and the trays are fastened again after the overlapping area of the anchor net sheet is pressed. The front row anchor rod position of the tunneling direction is the position of two net sheets in lap joint, the net sheets are tightly adhered to the wall surface by adopting a nut and tray fastening mode, the nut and the tray are required to be repeatedly disassembled and assembled in the net sheet lap joint process, the nut and the tray are inconvenient to disassemble and assemble, the repeated disassembly can cause great influence on the top plate, and small broken top plates are easy to drop. In addition, the dismounting process of the anchor rod tray and the nut is complex, and normal tunneling of a roadway is affected; if only adopt the forestope to support newly laying net piece, because the space between forestope and the roof is great, only can prevent that the roof from dropping the massive waste rock and hurting the people, and the control effect to the roof is relatively poor.
The temporary support system for the roof bolt of the coal mine tunnel comprises a temporary tray 1, a temporary nut 2 and a top protection type front cantilever 3, wherein the temporary tray 1 and the temporary nut 2 are arranged at the lap joint of an anchor net sheet 7 and are arranged on an anchor bolt 6, so that the nuts and the tray in the temporary support area can be conveniently detached, in addition, the top protection type front cantilever 3 is arranged at the head of a tunneling machine, and a top protection device is used for tightly pressing the anchor net sheet to be in close contact with a roof so as to control the roof to fall; the combination of the temporary tray and the temporary nut is utilized to realize the rapid decoration of the anchor rod tray, and the effect of hanging net and protecting the roof in the temporary support process of the anchor rod is improved by combining the roof-protecting type front cantilever and protecting the roof timely.
The temporary tray 1 comprises a plane tray 11 and a U-shaped handle 12, wherein the manufacturing materials of the plane tray 11 and the U-shaped handle 12 are the same as those of a common tray, and steel materials are selected; the size of the plane tray 11 is the same as the size of the mine anchor rod tray selected, so that the mine anchor rod tray is convenient to manufacture. The plane tray 11 is provided with a U-shaped opening, the U-shaped handle 12 is fixed on the opposite side of the U-shaped opening side of the plane tray 11, and the U-shaped handle 12 can be welded and fixed on the plane tray. The U-shaped opening of the temporary tray 1 is from the center of the tray to the edge of the tray, and the width of the U-shaped opening is equal to the diameter of the anchor rod, so that the installation, the fixation and the disassembly are convenient; the obtuse included angle of the plane where the plane tray 11 and the U-shaped handle 12 are positioned is 120-150 degrees, so that the temporary tray can be conveniently detached.
The temporary nut 2 comprises a rubber pad 21, a high-strength magnet 22, a clamping groove I23 and a clamping groove II 24, wherein the clamping groove comprises the clamping groove I23 and the clamping groove II 24, and the combined shape of the clamping groove I and the clamping groove II is the same as that of the hexagonal anchor rod nut 5. Its rubber pad 21 sets up in draw-in groove I and the inboard of draw-in groove II, cooperatees with the cambered surface groove of draw-in groove, and draw-in groove I and draw-in groove II pass through the grafting cooperation, and the grafting belongs to one of the connected mode between the component in the structure, belongs to just connecting. The high-strength magnet 22 is arranged at the inserting position of the clamping groove I and the clamping groove II, specifically the clamping groove I is provided with a protruding part, and the clamping groove II is provided with a recessed part; the high-strength magnet 22 is arranged at the position of the protruding part and the concave part, the butt joint surface of the protruding part and the concave part is provided with a mounting groove for mounting the high-strength magnet, the high-strength magnet 22 provides strong attractive force, and the structure of the form can ensure the mounting safety because the anchor rod nut is only subjected to the axial force along the anchor rod but not the radial force of breaking the nut after being actually mounted. The inner surface and the outer surface of the rubber pad of the temporary nut are provided with threads, the threads of the inner surface of the rubber pad are matched with the anchor rod, and the threads of the outer surface of the rubber pad are matched with the clamping groove.
The top protection type front cantilever 3 comprises a front cantilever 31, a lock page 32 and a top protection device 33, wherein the lock page 32 is welded and fixed with the front cantilever 31 and the top protection device 33 respectively, the front cantilever is connected with the top protection device through the lock page, the front cantilever is fixed on a top plate through a hanging ring, the lock page 32 limits the rotation range of the top protection device to 0-90 degrees, the top protection device can be fixed at the positions of 0-90 degrees, and the top protection device 33 is of an elastic telescopic structure. The roof protection device 33 may comprise an outer sleeve 331, an inner sleeve 332, a spring 333 and a switch pin 334, wherein the inner sleeve 332 is arranged in the outer sleeve 331, the spring 333 is connected with the bottom of the outer sleeve 331 and the bottom of the inner sleeve 332, and the switch pin 334 is arranged on the side wall of the outer sleeve.
The top protection device 33 may further comprise an outer sleeve 331, an inner sleeve 332, a spring 333 and a stop block 335, wherein the outer sleeve is internally provided with the spring 333, the spring 333 is connected with the bottom of the outer sleeve 331 and the bottom of the inner sleeve 332, a section of thread is arranged on the outer sleeve 331, the outer sleeve is compressed and then screwed down, the top protection device is contracted, the stop block 335 is further arranged on the inner sleeve in the telescopic direction, the position of the stop block 335 determines the maximum telescopic length of the top protection device, and the top protection device 33 is extended after the thread is unscrewed; other resilient telescopic rod arrangements may be used for the roof guard 33.
The temporary support method of the roof bolt of the coal mine tunnel is mainly applied to a weak cemented soft rock tunnel, and under the condition that a roof is easy to fall, the temporary support system of the roof bolt of the coal mine tunnel is utilized, and the concrete construction steps comprise:
and A, after a roadway is tunneled, hanging a roof protection type front cantilever on a roadway top plate behind a tunnelling head, rotating the roof protection device by 90 degrees to support the roadway top plate, and installing an anchor rod on the tunnelling head-on side.
And B, installing a temporary tray and a temporary nut on an anchor rod installed on the head-on side of tunneling to form a temporary support area.
And C, continuing tunneling the tunnel, removing the temporary tray and the temporary nuts, and overlapping the anchor net sheet in the temporary support area.
And D, rotating the top protection device until the top protection device is parallel to the front cantilever, and moving the top protection front cantilever forward.
And E, rotating the top protection device by 90 degrees to support the top plate, and permanently supporting the temporary supporting area through nuts and a tray behind the top protection type front cantilever.
And F, continuously tunneling the tunnel, and repeating the steps A to E until the permanent support of the whole tunnel is completed.
In the above method: when the temporary tray is installed, the U-shaped opening of the planar tray faces the heading direction, and the anchor rod is clamped in the center of the planar tray; when the temporary tray is removed, the U-shaped handle is held tightly to rapidly withdraw the temporary tray along the U-shaped opening. When the temporary nut is installed, firstly, a rubber pad is wrapped on an anchor rod section adjacent to the temporary tray, then the clamping groove I and the clamping groove II are fastened on the rubber pad, and the clamping groove I and the clamping groove II are fastened by the high-strength magnet; and when the temporary nut is disassembled, the clamping groove I and the clamping groove II are directly broken off, and the rubber pad is taken down. The top protection type front cantilever is hung on the top plate through a hanging ring, and the top protection device is arranged on one side close to the tunneling head; when the top protection device and the front cantilever form a right angle, the switch pin top protection device is opened to extend.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (6)
1. The temporary support system for the roof bolt of the coal mine tunnel is characterized by comprising a temporary tray, a temporary nut and a top protection type front cantilever, wherein the temporary tray and the temporary nut are arranged at the lap joint of an anchor net sheet and are arranged on the anchor bolt;
The temporary tray comprises a plane tray and a U-shaped handle, wherein the plane tray is provided with a U-shaped opening, and the U-shaped handle is fixed on the opposite side of the U-shaped opening side of the plane tray; the temporary nut comprises a rubber pad, a high-strength magnet, a clamping groove I and a clamping groove II, wherein the rubber pad is arranged on the inner sides of the clamping groove I and the clamping groove II, the clamping groove I and the clamping groove II are matched through plugging, and the high-strength magnet is arranged at the plugging position of the clamping groove I and the clamping groove II; the top protection type front cantilever comprises a front cantilever, a lock page and a top protection device, wherein the front cantilever is connected with the top protection device through the lock page, the front cantilever is fixed on a top plate through a hanging ring, the lock page limits the rotation range of the top protection device to 0-90 degrees, and the top protection device is of an elastic telescopic structure; threads are formed on the inner surface and the outer surface of the rubber pad of the temporary nut, the threads on the inner surface of the rubber pad are matched with the anchor rod, and the threads on the outer surface of the rubber pad are matched with the clamping groove; the clamping groove I is provided with a protruding part, and the clamping groove II is provided with a recessed part; the high-strength magnet is arranged at the positions of the protruding part and the recessed part; the lock page is fixed with the front cantilever and the top protection device respectively by welding, the top protection device comprises an outer sleeve, an inner sleeve, a spring and a switch pin, the inner sleeve is arranged in the outer sleeve, the spring is connected with the bottom of the outer sleeve and the bottom of the inner sleeve, and the switch pin is arranged on the side wall of the outer sleeve.
2. The temporary support system for roof bolts of a coal mine tunnel according to claim 1, wherein the U-shaped opening of the temporary tray is from the center of the tray to the edge of the tray, the width of the U-shaped opening is equal to the diameter of the bolts, and the obtuse included angle of the plane of the planar tray and the U-shaped handle is 120-150 °.
3. A method for temporary support of roof bolts of a coal mine tunnel, characterized in that the method for temporary support of roof bolts of a coal mine tunnel by using the system for temporary support of roof bolts of a coal mine tunnel according to claim 1 or 2 comprises the following construction steps:
step A, after a roadway is tunneled, hanging a roof protection type front cantilever on a roadway top plate behind a tunnelling head, rotating a roof protection device by 90 degrees to support the roadway top plate, and installing an anchor rod on the tunnelling head-on side;
step B, installing a temporary tray and a temporary nut on an anchor rod installed on the head-on side of tunneling to form a temporary support area;
step C, continuously tunneling a tunnel, removing a temporary tray and temporary nuts, and overlapping anchor net sheets in a temporary support area;
d, rotating the top protection device to be parallel to the front cantilever, and moving the top protection front cantilever forward;
E, rotating the top protection device by 90 degrees to support the top plate, and permanently supporting the temporary supporting area through nuts and a tray;
and F, continuously tunneling the tunnel, and repeating the steps A to E until the permanent support of the whole tunnel is completed.
4. The temporary support method for the roof bolts of the coal mine tunnel according to claim 3, wherein when the temporary tray is installed, the U-shaped opening of the planar tray faces the heading direction, and the bolts are clamped in the center of the planar tray; when the temporary tray is removed, the U-shaped handle is gripped to rapidly withdraw the temporary tray along the U-shaped opening.
5. The temporary support method for the roof anchor of the coal mine tunnel according to claim 3, wherein when the temporary nut is installed, a rubber pad is wrapped on an anchor rod section adjacent to the temporary tray, and then the clamping groove I and the clamping groove II are fastened on the rubber pad, so that the clamping groove I and the clamping groove II are fastened by the high-strength magnet; and when the temporary nut is detached, the clamping groove I and the clamping groove II are directly broken off, and the rubber pad is taken down.
6. The temporary supporting method for the roof bolt of the coal mine tunnel according to claim 3, wherein the roof protection type front cantilever is hung on the roof through a hanging ring, and the roof protection device is arranged on one side close to the tunneling head; when the top protection device and the front cantilever form a right angle, the switch pin top protection device is opened to extend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343170.9A CN110939475B (en) | 2019-12-24 | 2019-12-24 | Temporary support system and support method for roof anchor rod of coal mine tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343170.9A CN110939475B (en) | 2019-12-24 | 2019-12-24 | Temporary support system and support method for roof anchor rod of coal mine tunnel |
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| CN110939475A CN110939475A (en) | 2020-03-31 |
| CN110939475B true CN110939475B (en) | 2024-05-24 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111734460A (en) * | 2020-06-22 | 2020-10-02 | 河南理工大学 | Temporary support device for coal mine tunnel and construction method thereof |
| CN114810166B (en) * | 2022-05-14 | 2024-04-09 | 陕西煤业股份有限公司 | Temporary support system for roof anchor rod of coal mine tunnel and support method thereof |
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| CN104265748A (en) * | 2014-08-12 | 2015-01-07 | 侯福川 | Separate nut component |
| CN206035514U (en) * | 2016-08-31 | 2017-03-22 | 山西铺龙湾煤业有限公司 | Temporary support for drivage face |
| CN208010749U (en) * | 2018-04-04 | 2018-10-26 | 张家港市东恺五金工具有限公司 | A kind of locking nut |
| CN109973501A (en) * | 2019-03-13 | 2019-07-05 | 杭州钜力锚杆科技有限公司 | A kind of detachable Separated nut |
| CN109838253A (en) * | 2019-03-22 | 2019-06-04 | 河南理工大学 | A kind of systemic circulation combination beam type gib roof control device and its construction method |
| CN211500687U (en) * | 2019-12-24 | 2020-09-15 | 鄂尔多斯市昊华红庆梁矿业有限公司 | Temporary support system for roof anchor rod of coal mine tunnel |
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