CN110939475A - Temporary support system and method for roof bolt of coal mine tunnel - Google Patents
Temporary support system and method for roof bolt of coal mine tunnel Download PDFInfo
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- CN110939475A CN110939475A CN201911343170.9A CN201911343170A CN110939475A CN 110939475 A CN110939475 A CN 110939475A CN 201911343170 A CN201911343170 A CN 201911343170A CN 110939475 A CN110939475 A CN 110939475A
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- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000005641 tunneling Effects 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005065 mining Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
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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
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- 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 support method for a roof bolt 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 canopy, 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, the clamping groove I and the clamping groove II are matched in an inserted manner, and the clamping groove is fixedly connected through the high-strength magnet; the forepoling beam of the top protection type forepoling is connected with the top protection device through the lock leaf; during the tunneling construction of a roadway, firstly hanging a top protection type forepoling beam, installing an anchor rod, a temporary tray and a temporary nut at the tunneling head, continuing tunneling, removing the temporary tray and the temporary nut, overlapping anchor net sheets, closing a top protection device, then moving the top protection type forepoling beam forwards, and installing a nut tray for permanent support; it has solved and has dismantled tray and nut repeatedly and lead to hanging the not good technical problem of net canopy guard effect, has improved the efficiency of coal mine tunnel temporary support.
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 a roof bolt in a coal mine roadway, which are applied to a roof easy to fall.
Background
With the continuous increase of the mining depth of western mining areas, the problems encountered by the support of mine tunnels are also increased, and as most rock strata of western mining areas are weak cemented soft rocks, the influence on the tunneling support of the tunnel is not obvious during shallow mining, and after the rock strata enter the middle-deep part, the roof caving phenomenon is easy to occur during tunneling, so that the tunneling efficiency of the tunnel is severely limited.
The combined supporting technology of the anchor rods (cables) is mostly adopted in the roadway, the timely supporting of the anchor rods and the anchor nets is one of effective means for effectively preventing and controlling the roof from falling, the anchor rods are required to be hung with the nets in time when being installed, the anchor nets are guaranteed to be attached to the wall surfaces of the roof tightly, the anchor nets play a certain supporting role on the roof, and the roof is prevented from being empty and jacked in a large range. In order to ensure the effect of timely protecting the roof, anchor rod nut trays are mostly adopted to fasten the meshes on site, after the roadway is continuously tunneled, the meshes are lapped, and the anchor rod nut trays in the lapping area are detached and taken out, and are fastened again after the lapping areas of the two meshes are compressed. Because the front row of anchor rods are at the lapping positions of the two meshes, the mesh is tightly adhered to the wall surface in a nut and tray fastening mode, the repeated disassembly and assembly process of the nuts and the trays exists in the lapping process of the meshes, the repeated disassembly has great influence on the top plate, small broken top plates are easy to fall off to hurt people, the process is complex, and the normal tunneling of a roadway is influenced; further improvements to existing temporary support systems and methods are needed.
Disclosure of Invention
The invention provides a temporary support system and a temporary support method for a roof bolt of a coal mine tunnel, and aims to solve the technical problem that a net hanging roof protection effect is poor due to repeated disassembly of a tray and a nut during tunnel support of an easily caving roof area, improve the efficiency of temporary support of the coal mine tunnel, and effectively and timely realize roof protection.
A temporary support system for a roof bolt of a coal mine roadway comprises a temporary tray, temporary nuts and a top protection type forepoling beam, wherein the temporary tray and the temporary nuts are arranged at the lap joint of anchor net meshes and are arranged on the roof 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 to the opposite side of the U-shaped opening on the plane tray; the temporary nut comprises a rubber pad, a high-strength magnet, a clamping groove I and a clamping groove II, 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 in an inserted manner, and the high-strength magnet is arranged at the inserted position of the clamping groove I and the clamping groove II; the canopy guard type forepoling bar comprises a forepoling bar, a lock leaf and a canopy guard, wherein the forepoling bar is connected with the canopy guard through the lock leaf, the forepoling bar is fixed on a top plate through a hanging ring, the lock leaf limits the rotation range of the canopy guard to be 0-90 degrees, and the canopy guard 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 between the plane tray and the plane of the U-shaped handle is 120 degrees and 150 degrees.
Preferably, 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 convex part, and the clamping groove II is provided with a concave part; the high-strength magnet is arranged at the positions of the convex part and the concave part.
Still preferably, the lock leaf is respectively welded and fixed with the forepoling bar and the top protection device, 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 arranged in the outer sleeve and 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.
A coal mine tunnel roof bolt temporary support method utilizes the coal mine tunnel roof bolt temporary support system, and the construction steps comprise:
step A, after a roadway is excavated, hanging a top protection type front canopy on a roadway roof behind an excavation head, rotating a top protection device by 90 degrees to support the roadway roof, and installing an anchor rod on the side of the excavation head;
b, mounting a temporary tray and a temporary nut on an anchor rod mounted on the heading side to form a temporary supporting area;
c, continuing tunneling the roadway, removing the temporary tray and the temporary nut, and overlapping anchor net sheets in the temporary support area;
d, rotating the top protection device to be parallel to the front canopy, and moving the top protection type front canopy forwards;
e, the top protection device rotates for 90 degrees to support the top plate, and the temporary support area is permanently supported through the nut and the tray;
and F, continuing tunneling the roadway, and repeating the steps A to E until the permanent support of the whole roadway is completed.
Further preferably, when the temporary tray is installed, the U-shaped opening of the planar tray faces towards the heading direction, and the anchor rod is clamped in the center of the planar tray; when the temporary tray is detached, the U-shaped handle is held tightly to rapidly draw out the temporary tray along the U-shaped opening.
Further preferably, when the temporary nut is installed, the rubber pad is wrapped on the anchor rod section adjacent to the temporary tray, then the anchor rod section is tightly buckled on the rubber pad by the clamping groove I and the clamping groove II, and the clamping groove I and the clamping groove II are fastened by high-strength magnets; 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.
Preferably, the top protection type forepoling beam 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; and when the top protection device and the front canopy are at right angles, the switch pin is turned on to extend the top protection device.
The invention has the beneficial effects that:
(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 roof-protecting formula forestope in time to protect the top, has improved the effect that the stock interim supporting in-process hangs the net and protects the top, has avoided the problem of dismantling 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 groove from falling off through the rubber pad, so that the friction force between the anchor rod and the temporary nut is increased, the fastening effect of the nut is ensured by the high-strength magnet, and the temporary nut is convenient to disassemble; the top protection device of the top protection type forestope ensures the close contact between the anchor net sheets and the top plate, can also provide certain supporting force and plays a role in supporting the top plate.
(3) According to the coal mine roadway roof bolt temporary supporting method, the characteristic of an easily caving roof is considered, a top protecting type front canopy supports a tunneled roof in time, the anchor bolt is quickly fixed through a temporary tray and a temporary nut, and then when an anchor net mesh is lapped in a temporary supporting area, the temporary tray and the temporary anchor bolt are quickly and conveniently detached; and the roof-protecting type front canopy moves forwards along with the advancing of the working face in a circulating mode, 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 configuration;
FIG. 2 is a schematic structural diagram of a card slot I;
FIG. 3 is a schematic structural diagram of a card slot II;
FIG. 4 is a schematic view of a temporary nut;
FIG. 5 is a schematic view of a canopy guard type front canopy;
FIG. 6 is a schematic view of the construction of the canopy guard;
FIG. 7 is a schematic view of another construction of the canopy guard;
FIG. 8 is a schematic diagram of a temporary support structure of roof bolts of a coal mine roadway;
FIG. 9 is a schematic cross-sectional view of the A-A roadway 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 tray; 11-a planar tray; 12-U-shaped handle; 2-temporary nut; 21-rubber pad; 22-high-strength magnet; 23-card slot I; 24-card slot II; 3, protecting the top type front canopy; 31-a forepoling bar; 32-locking the page; 33-a roof guard; 331-outer sleeve; 332-inner sleeve; 333-spring; 334-a switch pin; 335-a stop; 34-a lifting ring; 4-anchor rod tray; 5-anchor bolt nut; 6-anchor rod; 7-anchor net sheet.
Detailed Description
Referring to fig. 1 to 10, embodiments of a temporary support system and a temporary support method for roof bolts of a coal mine roadway provided by the invention are as follows.
After the roadway is tunneled, anchor net meshes need to be lapped, if a front canopy support is adopted, the front canopy support is extended out, and then the front anchor net is supported and controlled; the anchor rod nut and the tray which are positioned in the lap joint area need to be dismounted and taken out, and the nut and the tray are fastened again after the lap joint area of the anchor net meshes is compressed. The front row anchor rod position department of tunnelling direction is two mesh piece overlap joint positions, adopts nut, tray fastening mode to make the net piece paste the wall tightly, need dismantle installation nut and tray repeatedly at net piece overlap joint in-process, and nut and tray dismouting are inconvenient, and the dismantlement is repeatedly dismantled and probably is caused great influence to the roof, and the broken roof of easy emergence fritter drops. In addition, the assembly and disassembly processes of the anchor rod tray and the nut are complex, so that the normal tunneling of the roadway is influenced; if only adopt the forestope to support newly-laid 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 people, and be relatively poor to the control effect of roof.
A coal mine tunnel roof anchor rod temporary supporting system specifically comprises a temporary tray 1, a temporary nut 2 and a top protection type forepoling beam 3, wherein the temporary tray 1 and the temporary nut 2 are arranged at the lap joint of an anchor net mesh 7 and are arranged on an anchor rod 6, so that the disassembly of the nut and the tray in a temporary supporting area is facilitated, in addition, the top protection type forepoling beam 3 is arranged at a tunneling head, and a top protection device tightly presses the anchor net mesh to be in close contact with a roof so as to control the roof to fall; the temporary tray and the temporary nut are combined to realize quick decoration of the anchor rod tray, the top protection type front canopy is combined to protect the top in time, and the effect of hanging net top protection in the anchor rod temporary supporting process is improved.
The temporary tray 1 comprises a plane tray 11 and a U-shaped handle 12, and the plane tray 11 and the U-shaped handle 12 are made of the same material as a common tray and are made of steel materials; the size of the plane tray 11 is the same as that of the selected mine anchor rod tray, so that the plane tray is convenient to manufacture. The planar 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 of the planar tray 11, and the U-shaped handle 12 can be welded and fixed on the planar 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 between the plane of the plane tray 11 and the plane of the U-shaped handle 12 is 120-150 degrees, which is convenient for the temporary tray to be 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, the clamping groove comprises a clamping groove I23 and a clamping groove II 24, and the shape of the clamping groove I combined with the clamping groove II is the same as that of the hexagonal anchor rod nut 5. A rubber pad 21 is arranged on the inner sides of the clamping groove I and the clamping groove II and is matched with an arc surface groove of the clamping groove, and the clamping groove I and the clamping groove II are matched in an inserted manner, and the inserted manner belongs to one of connection modes between components in a structural body and belongs to rigid connection. 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 convex part, and the clamping groove II is provided with a concave part; the high-strength magnet 22 is arranged at the positions of the protruding portion and the recessed portion, the mounting grooves are formed in the butt joint faces of the protruding portion and the recessed portion and used for mounting the high-strength magnet, the high-strength magnet 22 provides strong attraction force, and the anchor rod nut is only subjected to force along the axial direction of the anchor rod after being actually mounted and cannot be subjected to force for radially breaking the nut off, so that the mounting safety can be guaranteed through the structure of the form. The inner and outer surfaces of the rubber pad of the temporary nut are provided with threads, the threads on the inner surface of the rubber pad are matched with the anchor rod, the threads on the outer surface of the rubber pad are matched with the clamping grooves, and the structure can provide large friction force for the temporary nut.
The roof protection type forepoling bar 3 comprises a forepoling bar 31, a lock leaf 32 and a roof protection device 33, wherein the lock leaf 32 is respectively welded and fixed with the forepoling bar 31 and the roof protection device 33, the forepoling bar is connected with the roof protection device through the lock leaf, the forepoling bar is fixed on a roof through a hanging ring, the lock leaf 32 limits the rotation range of the roof protection device to be 0-90 degrees, the roof protection device can be fixed at the positions of 0 degree and 90 degrees, and the roof protection device 33 is of an elastic telescopic structure. The top protection device 33 can be, as shown in fig. 6, composed of 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 connects 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 can also be as shown in fig. 7, and comprises an outer sleeve 331, an inner sleeve 332, a spring 333 and a stop block 335, wherein the spring 333 is arranged in the outer sleeve, 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 is rotated to screw the thread, the top protection device contracts, the inner sleeve is also provided with the stop block 335 in the expansion direction, the position of the stop block 335 determines the maximum expansion length of the top protection device, and the top protection device 33 extends after the thread; in addition, other flexible telescopic rod structures can be used for the roof guard 33.
A coal mine tunnel roof bolt temporary support method is mainly applied to weak cementation soft rock tunnels and under the condition that a roof is easy to fall, the coal mine tunnel roof bolt temporary support system is utilized, and the concrete construction steps comprise:
and step A, after the roadway is excavated, hanging a top protection type front canopy on a roadway roof behind the excavation head, rotating the top protection device by 90 degrees to support the roadway roof, and installing an anchor rod on one side of the excavation head.
And B, mounting a temporary tray and a temporary nut on the anchor rod arranged on the heading side in the tunneling process to form a temporary supporting area.
And C, continuing tunneling the roadway, removing the temporary tray and the temporary nut, and overlapping the anchor net and the mesh in the temporary support area.
And D, rotating the top protection device until the top protection device is parallel to the front canopy, and moving the top protection type front canopy forwards.
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 trays behind the top protection type front canopy.
And F, continuing tunneling the roadway, and repeating the steps A to E until the permanent support of the whole roadway is completed.
In the above method: when the temporary tray is installed, the U-shaped opening of the plane tray faces the heading direction, and the anchor rod is clamped in the center of the plane tray; when the temporary tray is detached, the U-shaped handle is held tightly to rapidly draw out the temporary tray along the U-shaped opening. When the temporary nut is installed, the rubber pad is wrapped on the anchor rod section adjacent to the temporary tray, then the rubber pad is tightly buckled on the rubber pad through the clamping groove I and the clamping groove II, and the clamping groove I and the clamping groove II are fastened through the high-strength magnet; when the temporary nut is disassembled, the clamping groove I and the clamping groove II are directly broken, and the rubber pad is taken down. The top protection type forepoling beam 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; and when the top protection device and the front canopy are at right angles, the switch pin is turned on to extend the top protection device.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A temporary support system for a roof bolt of a coal mine tunnel is characterized by comprising a temporary tray, a temporary nut and a top protection type forepoling beam, wherein the temporary tray and the temporary nut are arranged at the lap joint of anchor net sheets and are arranged on the roof 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 to the opposite side of the U-shaped opening on the plane tray; the temporary nut comprises a rubber pad, a high-strength magnet, a clamping groove I and a clamping groove II, 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 in an inserted manner, and the high-strength magnet is arranged at the inserted position of the clamping groove I and the clamping groove II; the canopy guard type forepoling bar comprises a forepoling bar, a lock leaf and a canopy guard, wherein the forepoling bar is connected with the canopy guard through the lock leaf, the forepoling bar is fixed on a top plate through a hanging ring, the lock leaf limits the rotation range of the canopy guard to be 0-90 degrees, and the canopy guard is of an elastic telescopic structure.
2. The coal mine roadway roof bolt temporary support system as claimed in 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 bolt, and the obtuse included angle between the plane tray and the plane of the U-shaped handle is 120-150 degrees.
3. The coal mine roadway roof bolt temporary support system according to claim 1, wherein threads are arranged on the inner surface and the outer surface of a rubber pad of the temporary nut, the threads on the inner surface of the rubber pad are matched with the bolt, 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 convex part, and the clamping groove II is provided with a concave part; the high-strength magnet is arranged at the positions of the convex part and the concave part.
4. The coal mine roadway roof bolt temporary support system according to claim 1, wherein the lock leaf is respectively welded and fixed with the forepoling beam and the roof protection device, the roof 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.
5. A coal mine tunnel roof bolt temporary support method is characterized in that the coal mine tunnel roof bolt temporary support system of any one of claims 1-4 is utilized, and the construction steps comprise:
step A, after a roadway is excavated, hanging a top protection type front canopy on a roadway roof behind an excavation head, rotating a top protection device by 90 degrees to support the roadway roof, and installing an anchor rod on the side of the excavation head;
b, mounting a temporary tray and a temporary nut on an anchor rod mounted on the heading side to form a temporary supporting area;
c, continuing tunneling the roadway, removing the temporary tray and the temporary nut, and overlapping anchor net sheets in the temporary support area;
d, rotating the top protection device to be parallel to the front canopy, and moving the top protection type front canopy forwards;
e, the top protection device rotates for 90 degrees to support the top plate, and the temporary support area is permanently supported through the nut and the tray;
and F, continuing tunneling the roadway, and repeating the steps A to E until the permanent support of the whole roadway is completed.
6. The coal mine tunnel roof bolt temporary support method according to claim 5, characterized in that when the temporary tray is installed, the U-shaped opening of the plane tray faces the heading direction, and the bolt is clamped at the center of the plane tray; when the temporary tray is detached, the U-shaped handle is held tightly to rapidly draw out the temporary tray along the U-shaped opening.
7. The coal mine tunnel roof bolt temporary support method according to claim 5, characterized in that when the temporary nut is installed, a rubber pad is firstly wrapped on a bolt section adjacent to the temporary tray, and then the bolt section is tightly buckled on the rubber pad by a clamping groove I and a clamping groove II, and a high-strength magnet fastens the clamping groove I and the clamping groove II; 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.
8. The coal mine roadway roof bolt temporary support method as claimed in claim 5, wherein the roof protection type forepoling beam is hung on the roof through a hanging ring, and the roof protection device is arranged on one side close to the tunneling head; and when the top protection device and the front canopy are at right angles, the switch pin is turned on to extend the top protection device.
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 true CN110939475A (en) | 2020-03-31 |
| CN110939475B CN110939475B (en) | 2024-05-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114810166A (en) * | 2022-05-14 | 2022-07-29 | 陕西煤业股份有限公司 | Temporary support system for roof bolt of coal mine roadway and support method thereof |
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| 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 |
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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 |
| CN114810166A (en) * | 2022-05-14 | 2022-07-29 | 陕西煤业股份有限公司 | Temporary support system for roof bolt of coal mine roadway and support 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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