CN110410123B - Novel high-strength anchor rod supporting equipment for coal mine - Google Patents
Novel high-strength anchor rod supporting equipment for coal mine Download PDFInfo
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- CN110410123B CN110410123B CN201910738758.8A CN201910738758A CN110410123B CN 110410123 B CN110410123 B CN 110410123B CN 201910738758 A CN201910738758 A CN 201910738758A CN 110410123 B CN110410123 B CN 110410123B
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- anchor
- grouting
- anchoring
- sleeve
- rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of coal mine anchor rod support, and discloses novel high-strength anchor rod support equipment for a coal mine, wherein a support anchor rod mechanism comprises an outer anchor rod, an inner anchor sleeve and an outer plugging fixing component, the inner anchor sleeve can be well connected with the inner wall of a drill hole by utilizing a reinforcing structure extending in the radial direction of the inner anchor sleeve, the inner anchor sleeve is of a circumferential expansion structure and is easy to extend into the drill hole, special grouting is carried out on the inner anchor sleeve by utilizing the grouting equipment, the integral performance of the inner anchor sleeve and the inner wall of the anchor hole is ensured, the reinforcing structure can extend into a rock stratum of the anchor hole, and a segmented grouting anchoring mode can ensure that anchoring grout is filled more fully, the anchoring reliability can be improved, the binding force with the wall of the anchor drill hole is improved, and the anchoring effect is ensured; in addition, the fragile part of the joint of the inner anchoring sleeve and the outer anchoring rod can be effectively improved in the mode of arranging the plurality of radial fins, and the supporting capacity is guaranteed.
Description
Technical Field
The invention relates to the technical field of coal mine anchor rod support, in particular to novel high-strength anchor rod support equipment for a coal mine.
Background
The stock support equipment general structure about the colliery in the existing market is comparatively single, generally utilize the anchor rod of a similar reinforcing bar to stretch into the anchor downthehole anchor of carrying out, this kind of mode protection support performance is not enough, there is not fine engaging force between anchor rod and the stratum after the anchor, only rely on the inflation of slip casting to fasten between the two, this kind of mode makes anchor rod and slip casting liquid appear droing or crack very easily, it is not hard up to appear easily, can't realize axial and radial effective anchor to the anchor rod, influence and strut the ability, after meetting the too big stress of stratum and shifting, because not structure as an organic whole between anchor rod and the stratum, this makes anchor rod fracture scheduling problem appear very easily, influence and strut the ability, greatly reduced anchor rod's strut effect.
Therefore, the invention provides a novel high-strength anchor rod supporting device for a coal mine, which aims to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide novel high-strength anchor rod supporting equipment for a coal mine, and the novel high-strength anchor rod supporting equipment is used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel high-strength anchor rod supporting device for a coal mine comprises a supporting anchor rod mechanism, a grouting device and a supporting anchor net, wherein the grouting device and the supporting anchor net are matched with the supporting anchor rod mechanism; it is characterized in that the preparation method is characterized in that,
the support anchor rod mechanism comprises an outer anchor rod, an inner anchor sleeve and an outer plugging fixing component, wherein the inner anchor sleeve extends into the innermost part of the anchoring drill hole, and the inner end of the outer anchor rod can be sleeved in the inner anchor sleeve; the outer end of the outer anchoring rod is provided with the outer plugging fixing component which is positioned at the outer port of the anchoring drill hole;
when the anchor rod is supported, firstly, the inner anchoring sleeve extends into the innermost part of the anchoring drill hole, and grouting is carried out on the inner anchoring sleeve by using the grouting equipment, so that the inner anchoring sleeve expands and extends into the peripheral side wall of the anchoring drill hole; and then, the outer anchoring rod extends into and is connected with the outer end of the inner anchoring sleeve, the outer plugging fixing component is installed, and then grouting anchoring is carried out on the outer side of the outer anchoring rod by using the grouting equipment.
Further, as a preferred option, the inner anchoring sleeve is of an expandable elastic structure in the circumferential direction, a plurality of groups of reinforcing structures are axially spaced at the periphery of the inner anchoring sleeve, and each group of reinforcing structures comprises at least two reinforcing structures in a circumferential array.
Further, preferably, the inner anchoring sleeve is of a hollow structure with a cavity, the front end of the inner anchoring sleeve is a conical tip of a solid structure, and an elastic open slot extending along the axial direction of the inner anchoring sleeve is further arranged on the inner anchoring sleeve, and the inner anchoring sleeve is expandable in the circumferential direction through the elastic open slot.
Further, preferably, a plurality of radial grout holes are further provided on the outer peripheral side of the inner anchor bushing.
Further, as preferred, the additional strengthening is including strengthening the pedestal, the top of strengthening the pedestal is provided with horizontal conical head, and strengthens the bottom of pedestal and be provided with the slant and advance the thick liquid mouth, the bottom of strengthening the pedestal is located one side that the slant advances the thick liquid mouth and is fixed with the arch, the outside of strengthening the pedestal is run through and is provided with the thick liquid hole.
Preferably, a stepped connecting column is arranged at the front end of the outer anchoring rod, the stepped connecting column is sleeved at the outer end of the inner anchoring sleeve in a threaded manner, a plurality of radial fins in circumferential arrays are arranged on the part, close to one side of the outer anchoring rod, of the stepped connecting column, and the radial fins are arranged to abut against the end part of the inner anchoring sleeve.
Further, as preferred, slip casting equipment includes high-pressure slip casting ware, slip casting control connecting seat, slip casting high-pressure pipe, locating lever, slip casting pipeline and slip casting section expansion control bag piece, the top of high-pressure slip casting ware is provided with the slip casting control connecting seat, the grout outlet of slip casting control connecting seat is connected the slip casting high-pressure pipe, the end connection locating lever of slip casting high-pressure pipe, the end connection of locating lever have can with the slip casting pipeline that the outer end cooperation of interior anchor cover stretched into, the periphery of locating lever still overlaps and is equipped with slip casting section expansion control bag piece, slip casting section expansion control bag piece can expand and contract to anchor drilling inner wall seals to support, realizes the control in slip casting section space.
Further, preferably, an expansion control air pump or a hydraulic pump for controlling the expansion and contraction of the grouting section expansion control bag block is arranged on the grouting control connecting seat.
Further, as preferred, the fixed subassembly of outer shutoff includes location screw thread, four-way nut, set nut, backing plate, ends the thick liquid stopper, wherein, the anchor is strutted and is gone up the fixed dead lever that is provided with, the dead lever passes through four-way nut and outer anchor pole fixed connection, the one end of outer anchor pole is provided with the location screw thread, the outside of outer anchor pole is connected with four-way nut, and one side that the outside of outer anchor pole is located four-way nut is connected with set nut, one side that the outside of outer anchor pole is located set nut is provided with the backing plate, and one side that the outside of outer anchor pole is located the backing plate is provided with and ends the thick liquid stopper.
Preferably, the four-way nut is a cross-shaped structure, an axial internal thread is arranged at the center of the four-way nut, and internal threads perpendicular to the axial internal thread are also arranged at four corners of the cross, so as to be in threaded connection with the fixing rod.
Compared with the prior art, the invention has the beneficial effects that:
the invention not only sets a special support anchor rod mechanism, but also designs a grouting device matched with the support anchor rod mechanism, the support anchor rod mechanism comprises an outer anchor rod, an inner anchor sleeve and an outer sealing and fixing component, the inner anchor sleeve can be well connected with the inner wall of a drill hole by utilizing a reinforcing structure extending in the radial direction of the inner anchor sleeve, meanwhile, the inner anchor sleeve is a circumferential expansion structure and is easy to extend into the drill hole, the grouting device of the invention is utilized for special grouting to ensure the integral performance of the inner anchor sleeve and the inner wall of the anchor hole, the reinforcing structure can extend into a rock stratum of the anchor hole, simultaneously, the outer anchor rod can be well sleeved together with the inner anchor sleeve by adopting threads and the like to form a whole before the grouting is completely solidified, and then the outer anchor rod is anchored, thus, the segmented grouting and anchoring mode can not only ensure that grout is filled more firmly, the anchoring reliability can be improved, the binding force with the anchoring drill hole wall is improved, and the anchoring effect is ensured; in addition, the fragile part of the joint of the inner anchoring sleeve and the outer anchoring rod can be effectively improved in the mode of arranging the plurality of radial fins, and the supporting capacity is guaranteed.
Drawings
Fig. 1 is a schematic diagram of an arrangement and connection structure of a support anchor rod mechanism of a novel high-strength anchor rod support device for a coal mine on a support anchor net;
FIG. 2 is a schematic cross-sectional view of a bolting mechanism in a high-strength bolting apparatus for a new type of coal mine;
fig. 3 is another schematic angle sectional view of a bolting mechanism in a high-strength bolting apparatus for a novel coal mine;
fig. 4 is a schematic sectional view of an inner anchoring sleeve in a novel high-strength anchor rod supporting device for coal mines;
FIG. 5 is a schematic sectional view of the joint between the inner anchoring sleeve and the outer anchoring rod of the high-strength anchor rod support device for a novel coal mine;
fig. 6 is a schematic structural diagram of a reinforcing structure in a novel high-strength anchor rod supporting device for coal mines;
FIG. 7 is a schematic structural view of grouting of an inner anchoring sleeve of a grouting device of a novel high-strength anchor rod supporting device for a coal mine;
FIG. 8 is a schematic structural diagram of a grouting device in a novel high-strength anchor rod supporting device for coal mines;
fig. 9 is a schematic structural diagram of a four-way nut in a novel high-strength bolting device for coal mines.
Detailed Description
Referring to fig. 1 to 9, in an embodiment of the present invention, a novel high-strength bolting device for a coal mine includes a bolting mechanism, a grouting device and a bolting net 2, wherein the grouting device is matched with the bolting mechanism, an outer end of the bolting mechanism is fixedly connected to the bolting net, the bolting mechanism extends into an anchoring borehole, and the grouting device is capable of injecting an anchoring agent slurry into the anchoring borehole; it is characterized in that the preparation method is characterized in that,
the support anchor rod mechanism comprises an outer anchor rod 14, an inner anchor sleeve 3 and an outer plugging fixing component, wherein the inner anchor sleeve 3 extends into the innermost part of the anchoring drill hole, and the inner end of the outer anchor rod 14 can be sleeved in the inner anchor sleeve 3; the outer end of the outer anchoring rod 14 is provided with the outer plugging fixing component which is positioned at the outer port of the anchoring drill hole;
when the anchor rod is supported, firstly, the inner anchoring sleeve 3 extends into the innermost part of the anchoring drill hole, and grouting is carried out on the inner anchoring sleeve by using the grouting equipment, so that the inner anchoring sleeve expands and extends into the peripheral side wall of the anchoring drill hole; and then, the outer anchoring rod extends into and is connected with the outer end of the inner anchoring sleeve, the outer plugging fixing component is installed, and then grouting anchoring is carried out on the outer side of the outer anchoring rod by using the grouting equipment.
In this embodiment, the inner anchoring sleeve is an expandable elastic structure in the circumferential direction, and a plurality of sets of axially spaced reinforcing structures 10 are disposed on the outer circumferential portion of the inner anchoring sleeve 3, and each set of the reinforcing structures 10 includes at least two circumferentially arrayed reinforcing structures.
In a preferred embodiment, the inner anchoring sleeve has a hollow structure with a bore, the front end of the inner anchoring sleeve is a conical tip 11 with a solid structure, and the inner anchoring sleeve is further provided with an elastic opening groove 16 extending along the axial direction of the inner anchoring sleeve, and the elastic opening groove enables the inner anchoring sleeve to be arranged in an expandable manner in the circumferential direction.
Wherein, the periphery side of the inner anchoring sleeve is also provided with a plurality of radial grout through holes 9.
As a better embodiment, the reinforcing structure 10 includes a reinforcing base 101, a transverse conical head 102 is disposed at a top end of the reinforcing base 101, an oblique grout inlet 104 is disposed at a bottom end of the reinforcing base 101, a protrusion 105 is fixed at a side of the bottom end of the reinforcing base 101, which is located at the oblique grout inlet 104, and a grout hole 103 is formed through an outer side of the reinforcing base 101.
A stepped connecting column 15 is arranged at the front end of the outer anchoring rod, the stepped connecting column 15 is sleeved at the outer end of the inner anchoring sleeve in a threaded manner, a plurality of radial fins 17 in circumferential arrays are arranged on the part, close to one side of the outer anchoring rod, of the stepped connecting column 15, and the radial fins are abutted against the end part of the inner anchoring sleeve.
The grouting equipment comprises a high-pressure grouting device 18, a grouting control connecting seat 22, a grouting high-pressure pipe 21, a positioning rod 12, a grouting pipeline 13 and a grouting section expansion control pocket block 23, wherein the grouting control connecting seat 22 is arranged at the top of the high-pressure grouting device 18, a grout outlet of the grouting control connecting seat 22 is connected with the grouting high-pressure pipe 21, the end part of the grouting high-pressure pipe is connected with the positioning rod 12, the end part of the positioning rod is connected with the grouting pipeline 13 which can be matched with the outer end of an inner anchoring sleeve to stretch into, the periphery of the positioning rod is further sleeved with the grouting section expansion control pocket block 23, and the grouting section expansion control pocket block 23 can expand and contract so as to seal and abut against the inner wall of an anchoring drill hole and realize the control of a grouting section space.
And an expansion control air pump or a hydraulic pump 19 for controlling the expansion and contraction of the grouting section expansion control bag block 22 is arranged on the grouting control connecting seat 22.
The fixed subassembly of outer shutoff includes location screw thread 4, four-way nut 5, set nut 6, backing plate 7, ends thick liquid stopper 8, wherein, the anchor is strutted and is gone up the fixed dead lever 1 that is provided with, dead lever 1 is through four-way nut 5 and 3 fixed connection of outer anchor pole, the one end of outer anchor pole 3 is provided with location screw thread 4, the outside of outer anchor pole 3 is connected with four-way nut 5, and one side that the outside of outer anchor pole 3 is located four-way nut 5 is connected with set nut 6, one side that the outside of outer anchor pole 3 is located set nut 6 is provided with backing plate 7, and one side that the outside of outer anchor pole 3 is located backing plate 7 is provided with and ends thick liquid stopper 8.
The four-way nut 5 is of a cross-shaped structure, an axial internal thread is arranged at the center of the four-way nut, and internal threads perpendicular to the axial internal thread are also arranged at four corners of the cross, so that the four-way nut is in threaded connection with the fixing rod.
The invention not only sets a special support anchor rod mechanism, but also designs a grouting device matched with the support anchor rod mechanism, the support anchor rod mechanism comprises an outer anchor rod, an inner anchor sleeve and an outer sealing and fixing component, the inner anchor sleeve can be well connected with the inner wall of a drill hole by utilizing a reinforcing structure extending in the radial direction of the inner anchor sleeve, meanwhile, the inner anchor sleeve is a circumferential expansion structure and is easy to extend into the drill hole, the grouting device of the invention is utilized for special grouting to ensure the integral performance of the inner anchor sleeve and the inner wall of the anchor hole, the reinforcing structure can extend into a rock stratum of the anchor hole, simultaneously, the outer anchor rod can be well sleeved together with the inner anchor sleeve by adopting threads and the like to form a whole before the grouting is completely solidified, and then the outer anchor rod is anchored, thus, the segmented grouting and anchoring mode can not only ensure that grout is filled more firmly, the anchoring reliability can be improved, the binding force with the anchoring drill hole wall is improved, and the anchoring effect is preferably ensured; in addition, the fragile part of the joint of the inner anchoring sleeve and the outer anchoring rod can be effectively improved in the mode of arranging the plurality of radial fins, and the supporting capacity is guaranteed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (3)
1. A novel high-strength anchor rod supporting device for coal mines comprises a supporting anchor rod mechanism, a supporting anchor net (2) and a grouting device matched with the supporting anchor rod mechanism, wherein the outer end of the supporting anchor rod mechanism is fixedly connected to the supporting anchor net, the supporting anchor rod mechanism extends into an anchor drill hole, and the grouting device can inject anchoring agent slurry into the anchor drill hole; it is characterized in that the preparation method is characterized in that,
the support anchor rod mechanism comprises an outer anchor rod (14), an inner anchor sleeve (3) and an outer plugging fixing component, wherein the inner anchor sleeve (3) extends into the innermost part of the anchoring drill hole, and the inner end of the outer anchor rod (14) can be sleeved in the inner anchor sleeve (3); the outer end of the outer anchoring rod (14) is provided with the outer plugging fixing component positioned at the outer port of the anchoring drill hole;
when the anchor rod is used for supporting, firstly, the inner anchoring sleeve (3) extends into the innermost part of the anchoring drill hole, and grouting is carried out on the inner anchoring sleeve by using the grouting equipment, so that the inner anchoring sleeve expands and extends into the peripheral side wall of the anchoring drill hole; then, the outer anchoring rod extends into the outer end of the inner anchoring sleeve, the outer plugging fixing assembly is installed, and then grouting anchoring is carried out on the outer side of the outer anchoring rod by using grouting equipment;
the inner anchoring sleeve is of an expandable elastic structure in the circumferential direction, a plurality of groups of reinforcing structures (10) are axially arranged at intervals on the periphery of the inner anchoring sleeve (3), and each group of reinforcing structures (10) comprises at least two reinforcing structures in a circumferential array;
the inner anchoring sleeve is of a hollow structure with a hole cavity, the front end of the inner anchoring sleeve is a conical tip (11) of a solid structure, an elastic open slot (16) extending along the axial direction of the inner anchoring sleeve is further arranged on the inner anchoring sleeve, and the inner anchoring sleeve can be arranged in an expandable manner in the circumferential direction through the elastic open slot;
a plurality of radial slurry through holes (9) are also formed in the outer peripheral side of the inner anchoring sleeve;
the reinforcing structure (10) comprises a reinforcing seat body (101), a transverse conical head (102) is arranged at the top end of the reinforcing seat body (101), an oblique grout inlet (104) is formed in the bottom end of the reinforcing seat body (101), a bulge (105) is fixed at one side, located at the oblique grout inlet (104), of the bottom end of the reinforcing seat body (101), and a grout hole (103) penetrates through the outer side of the reinforcing seat body (101);
a stepped connecting column (15) is arranged at the front end of the outer anchoring rod, the stepped connecting column (15) is sleeved at the outer end of the inner anchoring sleeve in a threaded manner, a plurality of radial fins (17) in a circumferential array are arranged on the part, close to one side of the outer anchoring rod, of the stepped connecting column (15), and the radial fins are abutted against the end part of the inner anchoring sleeve;
the grouting equipment comprises a high-pressure grouting device (18), a grouting control connecting seat (22), a grouting high-pressure pipe (21), a positioning rod (12), a grouting pipeline (13) and a grouting section expansion control bag block (23), wherein the grouting control connecting seat (22) is arranged at the top of the high-pressure grouting device (18), a grout outlet of the grouting control connecting seat (22) is connected with the grouting high-pressure pipe (21), the end part of the grouting high-pressure pipe is connected with the positioning rod (12), the end part of the positioning rod is connected with the grouting pipeline (13) which can be matched with the outer end of the inner anchoring sleeve to extend into, the periphery of the positioning rod is further sleeved with the grouting section expansion control bag block (23), and the grouting section expansion control bag block (23) can expand and contract so as to seal and abut against the inner wall of the anchoring drill hole and realize the control of the grouting section space;
the outer fixed subassembly of shutoff includes positioning thread (4), four-way nut (5), set nut (6), backing plate (7), ends thick liquid stopper (8), wherein, and it is provided with dead lever (1) to strut the anchor net, dead lever (1) is through four-way nut (5) and outer anchor pole (14) fixed connection, the one end of outer anchor pole (14) is provided with positioning thread (4), the outside of outer anchor pole (14) is connected with four-way nut (5), and one side that the outside of outer anchor pole (14) is located four-way nut (5) is connected with set nut (6), one side that the outside of outer anchor pole (14) is located set nut (6) is provided with backing plate (7), and one side that the outside of outer anchor pole (14) is located backing plate (7) is provided with and ends thick liquid stopper (8).
2. The novel high-strength anchor rod supporting equipment for the coal mine as claimed in claim 1, wherein an expansion control air pump or a hydraulic pump (19) for controlling the expansion and contraction of the grouting section expansion control bag block (23) is arranged on the grouting control connecting seat (22).
3. A novel high-strength anchor bolt support device for coal mine as claimed in claim 1, wherein said four-way nut (5) is cross-shaped, and its center is provided with axial internal thread, and its four corners are also provided with internal threads perpendicular to said axial internal thread, so as to be connected with said fixing rod by screw thread.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910738758.8A CN110410123B (en) | 2019-08-15 | 2019-08-15 | Novel high-strength anchor rod supporting equipment for coal mine |
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| CN201910738758.8A CN110410123B (en) | 2019-08-15 | 2019-08-15 | Novel high-strength anchor rod supporting equipment for coal mine |
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| CN110410123B true CN110410123B (en) | 2021-06-08 |
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| CN110905570B (en) * | 2019-12-10 | 2021-03-23 | 济宁学院 | A stock anchor beam supporting construction for coal mine tunnel |
| CN111424658B (en) * | 2020-04-01 | 2021-09-10 | 王炳炜 | Anchor rod construction device for constructional engineering |
| CN112302696B (en) * | 2020-09-30 | 2023-02-28 | 中煤科工开采研究院有限公司 | Anchor rod assembly |
| CN112324323B (en) * | 2020-10-30 | 2023-01-17 | 中航勘察设计研究院有限公司 | Grouting supporting type drilling and anchoring integrated machine and anchoring method |
| CN113187530A (en) * | 2021-06-07 | 2021-07-30 | 黑龙江科技大学 | Broken roof supporting device of special soft rock of mining |
| CN113339034B (en) * | 2021-07-07 | 2023-06-20 | 六盘水师范学院 | Intelligent anchor rod suitable for tunnel support and stability measurement |
| CN115839244B (en) * | 2023-02-13 | 2023-04-18 | 中铁五局集团电务工程有限责任公司 | Short-distance subway shield tunnel crossing operation supporting equipment and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4664561A (en) * | 1986-08-12 | 1987-05-12 | The Eastern Co. | Combined resin-mechanical mine roof bolt anchor |
| CN1200199C (en) * | 2002-06-24 | 2005-05-04 | 吴德兴 | A pin timbering process and sectionalized hollow mud injecting stay bolt thereof |
| CN105422153B (en) * | 2015-12-29 | 2017-12-19 | 湖南大学 | A kind of segmentation anchoring bolt reinforced for zonal fracturing roadway surrounding rock |
| CN109057840B (en) * | 2018-08-20 | 2020-03-31 | 中钢集团马鞍山矿山研究院有限公司 | Self-adaptive grouting reinforcement anchor rod under high stress and anchoring construction method thereof |
| CN109184767B (en) * | 2018-11-09 | 2020-07-28 | 石家庄铁道大学 | Tension expansion type hollow grouting anchor rod structure |
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