CN214836457U - Novel downthehole yielding full-anchor cable - Google Patents
Novel downthehole yielding full-anchor cable Download PDFInfo
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- CN214836457U CN214836457U CN202120292065.3U CN202120292065U CN214836457U CN 214836457 U CN214836457 U CN 214836457U CN 202120292065 U CN202120292065 U CN 202120292065U CN 214836457 U CN214836457 U CN 214836457U
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Abstract
The utility model relates to a novel downthehole yielding full anchor cable, including the cavity slip casting anchor cable body and sealed yielding device, the cavity slip casting anchor cable body is including stretch-draw section, slip casting section and the grout outlet section that sets gradually, and the one end that the slip casting section was kept away from in the stretch-draw section sets up the slip casting mouth, and the grout outlet section sets up the grout outlet, and the surface cover of slip casting section is equipped with the isolation sleeve; the sealing yielding device comprises an outer sleeve sleeved at the joint of the grouting section and the grout outlet section, and a threaded sleeve and a yielding pier tube which are positioned in the outer sleeve, wherein the threaded sleeve is connected with the outer sleeve through threads, the threaded sleeve and the grout outlet section are relatively and fixedly arranged in the axial direction, and the yielding pier tube and the grouting section are relatively and fixedly arranged in the axial direction; the hole of outer tube is equipped with the internal thread with the threaded sleeve adaptation including threaded hole section, taper hole section and the slip joint hole section that sets gradually in the threaded hole section, and the taper hole section is close to the one end diameter of slip joint hole section and is less than the other end, lets press the mound pipe to be located the taper hole section, and lets the external diameter that presses the mound pipe be greater than slip joint hole section internal diameter 1~2 mm.
Description
Technical Field
The utility model relates to a mine tunnel supports technical field for tunnel support or reinforcement anchor rope under the high stress large deformation country rock condition, tunnel support and reinforcement engineering under the specially adapted rock burst condition specifically indicate a novel downthehole full anchor rope of stepping down.
Background
With the increase of coal mining depth in China, the deep tunnel is buried deeply and has high stress level, the pressure of ore is displayed severely after the tunnel is excavated, the deformation of surrounding rock is difficult to be effectively limited by the traditional anchor cable supporting means, the surrounding rock is broken and expanded, and the anchor cable is also moved out together with the contraction of the section of the tunnel, so that the supporting failure is caused; particularly, in deep high stress and rock burst tendency roadway support, the rigid support elongation of the anchor net cable is low, the yielding condition is poor, the phenomenon of stress concentration aggravation and even rock burst is often caused, and simultaneously, under the condition of high tensile force, the rock mass is subjected to transverse dislocation caused by the rock burst to cause the shearing breakage of the cable body.
Aiming at the support of the roadway with the rock burst tendency, the energy absorption performance of the support material is improved by mainly adopting a special treatment process material with high extensibility at present, or the surrounding rock support is carried out by adopting an anchor rope or an anchor rod which is matched with a yielding or constant-resistance device and used for mining, and certain disadvantages are caused: firstly, the pretightning force is little to cause preliminary bracing to protect the table intensity low, secondly lets the pressure scope be difficult to master and causes the scene adaptability poor, thirdly the end anchor rope free section causes the cable body to be sheared and became invalid because of the rock stratum horizontal dislocation.
Disclosure of Invention
In order to overcome prior art and to warp greatly in the deep and have the impact tendency tunnel and let the pressure strut the scope little, the operating procedure is complicated, the anti shearing capability of anchor rope poor not enough, the utility model provides a novel downthehole full anchor cable of letting down carries out full anchor to the deep rock burst tunnel and lets the pressure strut the reinforcement, can satisfy the tunnel and warp greatly and let the pressure energy-absorbing needs, can show improvement anchor rope anti shearing performance again.
The utility model is realized by the following technical scheme, a novel in-hole yielding full anchor cable is provided, which comprises a hollow grouting anchor cable body and a sealing yielding device, wherein the hollow grouting anchor cable body comprises a tensioning section, a grouting section and a grout outlet section which are sequentially arranged, one end of the tensioning section, which is far away from the grouting section, is provided with a grouting port, the grout outlet section is provided with a grout outlet, and the outer surface of the grouting section is sleeved with an isolation sleeve;
the sealing yielding device comprises an outer sleeve sleeved at the joint of the grouting section and the grout outlet section, and a threaded sleeve and a yielding pier tube which are positioned in the outer sleeve, wherein the threaded sleeve is connected with the outer sleeve through threads, the threaded sleeve and the grout outlet section are relatively and fixedly arranged along the axial direction, and the yielding pier tube and the grouting section are relatively and fixedly arranged along the axial direction; the hole of outer tube is equipped with the internal thread with the threaded sleeve adaptation including threaded hole section, taper hole section and the slip joint hole section that sets gradually in the threaded hole section, and the taper hole section is close to the one end diameter of slip joint hole section and is less than the other end, lets press the mound pipe to be located the taper hole section, and lets the external diameter that presses the mound pipe be greater than slip joint hole section internal diameter 1~2 mm.
According to the scheme, grouting is carried out through the grouting port during anchoring, and slurry flows out of the slurry outlet and then fills gaps between the cable body and the surrounding rock holes, so that full-length anchoring of the hollow grouting anchor cable is realized, the free section of the anchor cable is eliminated, the cable body and the surrounding rock are connected into a whole, and tensioning and pre-tightening are carried out through the tray and the lock; during pre-tightening, the pressure-yielding pier tube is blocked by the side wall of the sliding connection hole section and cannot move relative to the outer sleeve, when the surrounding rock deforms, the pulling force borne by the cable body is increased, the pressure-yielding pier tube enters the sliding connection hole section under the guiding action of the conical surface of the conical hole section, axial displacement occurs, pressure yielding is achieved, and the cable body is prevented from being cut and broken.
A first sealing ring is arranged between the threaded sleeve and the yielding pier tube. This optimization scheme is through setting up first sealing ring for first sealing ring receives the screw sleeve pipe and screws up back compression effect, carries out circumference to screw sleeve pipe and let and press the gap between the sleeve pipe and seal, and the hole of first sealing ring forms thick liquid passageway, and thick liquid infiltration outer tube inner cavity when can preventing the later stage slip casting.
Preferably, a second sealing ring is arranged between one end of the outer sleeve, which is far away from the slurry outlet section, and the isolation sleeve. The gap between the isolation sleeve and the outer sleeve is plugged through the second sealing ring, and slurry is prevented from entering the inner cavity of the outer sleeve during grouting.
Furthermore, one end of the outer sleeve pipe, which is far away from the slurry outlet section, is provided with a sealing table extending towards the cable body, and the side surface of the sealing table, which faces the sliding connection hole section, is a conical surface; the second sealing ring comprises an integrally formed conical ring and a column ring, the conical surface of the conical ring is matched with the conical surface of the sealing platform, the column ring extends between the isolation sleeve and the sealing platform, the outer diameter of the column ring is matched with the inner diameter of the sealing platform, and a through hole which penetrates through the conical ring and the column ring and is matched with the outer diameter of the isolation sleeve is further formed in the second sealing ring. According to the optimized scheme, the sealing platform is arranged, so that the yielding pier tube is prevented from being separated from the outer sleeve, and the yielding range is favorably controlled; meanwhile, the second sealing ring is limited by the sealing table, the second sealing ring is prevented from falling off from the outer sleeve, the conical surface of the sealing table is attached to the conical ring, and the sealing effect is improved.
As optimization, the slurry outlet section comprises a slurry outlet hollow steel pipe and a steel wire twisted on the outer surface of the slurry outlet hollow steel pipe, a first through hole matched with the slurry outlet hollow steel pipe and a plurality of steel wire through holes which are positioned on the periphery of the first through hole and matched with the steel wire are arranged on the threaded sleeve; the grouting section comprises a hollow grouting core pipe and steel wires twisted on the outer surface of the hollow grouting core pipe, a second through hole matched with the hollow grouting core pipe is formed in the yielding pier pipe, and a plurality of steel wires which are located on the periphery of the second through hole and matched with the steel wires penetrate through the hole. According to the optimized scheme, the steel wire of the grout outlet section rope body passes through the threaded sleeve, the steel wire of the grouting section rope body passes through the yielding pier tube, the fixed connection of the threaded sleeve and the steel wire and the fixed connection of the yielding pier tube and the steel wire are facilitated, the pier head mode can be adopted in the fixed connection mode, and the lockset clamping piece structure can also be adopted.
And optimally, a limiting bulge larger than the steel wire passing hole is arranged on the steel wire between the threaded sleeve and the yielding pier tube. This optimization scheme realizes the solid antithetical couplet through set up spacing arch on the steel wire, prevents that the slip casting section steel wire from letting to press the mound pipe to deviate from, prevents that the thick liquid section steel wire from deviating from the threaded sleeve pipe, has guaranteed the reliability of biography power.
Preferably, a lubricating layer is arranged between the isolation sleeve and the cable body. This optimization scheme is through setting up the lubricant film, conveniently carries out the pretension to the cable body.
The utility model has the advantages that: the hollow grouting anchor cable body and the grouting stone body are provided with pressure yielding sealing outer sleeves, so that the normal stress extension deformation pressure yielding performance of the anchor cable is ensured, and the stress is prevented from being concentrated in an orifice; the full anchor is realized, the free section of the anchor cable is eliminated through full anchor reinforcement, the shearing resistance of the cable body of the hollow grouting anchor cable is improved, and the anchor cable is prevented from being sheared due to rock stratum dislocation; the surrounding rock deformation constraint effect is improved by pre-tightening in advance, and the staged quantitative yielding mode of pressure and energy absorption is more suitable for the condition of rock burst tendency roadway large deformation through cable body extension first.
Drawings
FIG. 1: a structural schematic diagram of a novel yielding full-anchor cable;
FIG. 2: FIG. 1 is a sectional view taken along line A-A' of a grout outlet section of a hollow grouting anchor cable body;
FIG. 3: FIG. 1 is a sectional view of a section B-B' of a grouting section of a hollow grouting anchor cable body;
FIG. 4: FIG. 1 is a C-C' cross-sectional view of a tension section of a hollow grouting anchor cable body;
FIG. 5: FIG. 1 is a sectional view of a threaded sleeve structure of a sealing and pressure-yielding device;
FIG. 6: FIG. 1 is a sectional view of a structure of a sealing yielding device yielding pier tube;
FIG. 7: FIG. 1 is a cross-sectional view of an outer sleeve structure of the sealing and pressure-yielding device;
FIG. 8: FIG. 1 is a schematic structural view of a sealing and pressure-yielding device;
FIG. 9: a novel yielding full-anchor cable field implementation example;
shown in the figure:
1. the anchor cable body is grouted in cavity, 11, stretch-draw section, 111, slip casting mouth, 112, stretch-draw hollow steel pipe, 12, the slip casting section, 121, cavity slip casting core pipe, 13, the section of puting out thick liquid, 131, the hollow steel pipe of puting out thick liquid, 132, the mouth of puting out thick liquid, 2, the steel wire, 3, the spacer tube, 4, sealed yielding device, 41, threaded sleeve, 42, yield and press mound pipe, 43, outer tube, 44, first sealing ring, 45, second sealing ring, 5, the grout stop plug, 6, tray, 7, tool to lock, 8, slip casting material, 9, drilling, 10, country rock.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 1, the novel hole yielding full anchor cable comprises a hollow grouting anchor cable body 1, an isolation sleeve 3, a grout stop plug 5, a tray 6, a lock 7 and a sealing yielding device 4, wherein the grout stop plug 5 is sleeved on a grouting section 12 of the hollow grouting anchor cable body and is arranged at the front end of the tray 6, and the tray 6 and the lock 7 are sequentially sleeved on a tensioning section 11 of the hollow grouting anchor cable body. The grout stop plug is a cone with an inner hole, the diameter of the cone top is larger than that of the cable body of the hollow grouting anchor cable, the diameter of the cone bottom is larger than that of the drill hole, and the grout stop plug is sleeved on the grouting section of the cable body of the hollow grouting anchor cable and is arranged at the hole opening of the drill hole. The tray is a steel plate with small holes and is sleeved on the tensioning section of the cable body of the hollow grouting anchor cable. The lock is a single-hole mining anchor cable lock and is sleeved on the tensioning section of the hollow grouting anchor cable body.
The hollow grouting anchor cable body 1 comprises a tensioning section 11, a grouting section 12 and a grout outlet section 13 which are sequentially arranged, an isolation sleeve 3 is sleeved on the outer surface of the grouting section, the isolation sleeve is made of a tubular material, and the length of the isolation sleeve is the same as that of the grouting section of the hollow grouting anchor cable body. Specifically, the isolation sleeve is made of a heat-shrinkable tubular material, a lubricating layer is arranged between the isolation sleeve and the cable body, namely, the isolation lubricating material is coated on the inner wall of the isolation sleeve 3, the isolation sleeve is fixed with the grouting section through heating and diameter reduction, the isolation sleeve 3 can be made of the heat-shrinkable material with lubricating grease inside, and a rigid or flexible sleeve can be adopted to be tightly attached to the grouting section 12.
The tensioning section 11 comprises a tensioning hollow steel pipe 112 and a steel wire twisted on the outer surface of the tensioning hollow steel pipe 112, one end of the tensioning section, which is far away from the grouting section, is provided with a grouting opening 111, and the other end of the tensioning section is connected with the grouting section 12. Go out thick liquid section one end and sealed letting press device 4 and link to each other, a plurality of grout outlets 132 are arranged to the other end, it includes out thick liquid cavity steel pipe 131 and twists in the steel wire 2 of play thick liquid cavity steel pipe surface to go out the thick liquid section, sealed let be equipped with on the threaded sleeve of press device with go out the first through-hole of thick liquid cavity steel pipe adaptation, and be located first through-hole periphery and pass the hole with a plurality of steel wires of steel wire adaptation, it sets up grout outlet 132 to go out the thick liquid section, for improving out thick liquid efficiency, this embodiment sets up to tip grout outlet at the one end of keeping away from the slip casting section with play thick liquid cavity steel pipe 131, set up a plurality of lateral part grout outlet on the lateral wall of play thick liquid cavity steel pipe 131, the thick liquid that flows out the thick liquid by lateral part grout outlet passes the gap between the steel wire and enters into the country rock hole. Grouting section one end is connected with stretch-draw section, and the other end lets pressure device with sealed to be connected, and the grouting section includes cavity slip casting core pipe 121 and twists in the steel wire of cavity slip casting core pipe surface, and sealed letting pressure device let be equipped with on the mound pipe with the second through-hole of cavity slip casting core pipe adaptation to and be located the second through-hole periphery and pass the hole with a plurality of steel wires of steel wire adaptation. Go out thick liquid section steel wire and threaded sleeve and connect firmly, slip casting section steel wire with let press the mound pipe and connect firmly, connect the mode admittedly and can adopt the pier nose mode, also can adopt tool to lock clamping piece structure, this embodiment is equipped with the spacing arch that is greater than the steel wire and passes the hole on threaded sleeve and let the steel wire between pressing the mound pipe, go out the spacing arch on the thick liquid section steel wire and restrict a thick liquid section steel wire and threaded sleeve separation, spacing arch on the slip casting section steel wire restricts slip casting section steel wire and lets press the sleeve separation.
The sealing yielding device 4 is arranged between the grouting section 12 and the grout outlet section 13 of the hollow grouting anchor cable, and specifically comprises an outer sleeve 43 sleeved at the joint of the grouting section and the grout outlet section, and a threaded sleeve 41 and a pressure-yielding pier tube 42 which are positioned in the outer sleeve, wherein the pressure-yielding pier tube 42 is a cylindrical structure with a smooth side surface, the threaded sleeve is a cylindrical structure with an external thread on the side surface, the threaded sleeve 41 is connected with the outer sleeve 43 through a thread, and the threaded sleeve and the grout outlet section are relatively and fixedly arranged along the axial direction, the pressure-yielding pier tube 42 and the grouting section are relatively and fixedly arranged along the axial direction, a first sealing ring 44 with a cylindrical annular structure is arranged between the threaded sleeve and the pressure-yielding pier tube, a second sealing ring 45 is arranged between one end of the outer sleeve far away from the grout outlet section and the isolation sleeve, through setting up first sealing ring and second sealing ring, avoid the thick liquid to get into the outer tube inner chamber to form the thick liquid that solidifies in avoiding the outer tube and hinder and let the pressure realize.
The hole of outer tube is including the screw hole section that sets gradually, taper hole section and slip joint hole section, the cable body passes the screw hole section in proper order, the hole of taper hole section and slip joint hole section, be equipped with in the screw hole section with the internal thread of screw sleeve adaptation, the one end diameter that the taper hole section is close to the slip joint hole section is less than the other end, let press the mound pipe to be located the taper hole section, and let the external diameter that presses the mound pipe be greater than slip joint hole section internal diameter 1~2mm, can make and let press the mound pipe to pass through under certain pulling force. One end of the outer sleeve pipe, which is far away from the grout outlet section, is provided with a sealing table extending towards the cable body, the pressing pier pipe is limited by the sealing table to be pulled out of the outer sleeve pipe, and the side surface of the sealing table, which faces the sliding connection hole section, is a conical surface; the second sealing ring comprises an integrally formed conical ring and a column ring, the conical surface of the conical ring is matched with the conical surface of the sealing platform, the column ring extends between the isolation sleeve and the sealing platform, the outer diameter of the column ring is matched with the inner diameter of the sealing platform, and a through hole which penetrates through the conical ring and the column ring and is matched with the outer diameter of the isolation sleeve is further formed in the second sealing ring.
The construction application process of the novel in-hole yielding full-anchor cable in the embodiment is described by taking the diameter of the hollow grouting anchor cable body 1 as 22mm and the outer sleeve outer diameter of the sealing yielding device as an example:
1. drilling: firstly, constructing a drill hole 9 in the surrounding rock 10, wherein the diameter of the drill hole is 55-60mm, and the depth of the drill hole is smaller than the length of the novel in-hole yielding full-anchor cable by 200-300 mm;
2. and (3) anchor cable installation: sending the parts of the novel in-hole yielding full-anchor cable except the tray 6 and the lockset 7 into the drill hole 9, and reliably fixing;
3. grouting and anchoring: grouting the anchor cable through a grouting opening 111 of a tensioning section of the hollow grouting anchor cable to enable grouting materials 8 to fill the space between the drill hole 9 and the surrounding rock 10 cracks, so that full-anchor reinforcement of the anchor cable is realized;
4. tensioning and pre-tightening: after the grouting material 8 is completely solidified, the tray 6 and the lock 7 are sleeved in the hollow grouting anchor cable tensioning section 11, and a tensioning machine is adopted to tension and pre-tighten the anchor cable.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a novel downthehole let presses full anchor rope which characterized in that: the grouting anchor cable comprises a hollow grouting anchor cable body (1) and a sealing yielding device (4), wherein the hollow grouting anchor cable body comprises a tensioning section (11), a grouting section (12) and a grout outlet section (13) which are sequentially arranged, one end, far away from the grouting section, of the tensioning section is provided with a grouting port (111), the grout outlet section is provided with a grout outlet (132), and an isolation sleeve (3) is sleeved on the outer surface of the grouting section;
the sealing yielding device comprises an outer sleeve (43) sleeved at the joint of the grouting section and the grout outlet section, a threaded sleeve (41) and a yielding pier tube (42) which are positioned in the outer sleeve, wherein the threaded sleeve (41) is connected with the outer sleeve (43) through threads, the threaded sleeve and the grout outlet section are relatively and fixedly arranged in the axial direction, and the yielding pier tube (42) and the grouting section are relatively and fixedly arranged in the axial direction;
the hole of outer tube is equipped with the internal thread with the threaded sleeve adaptation including threaded hole section, taper hole section and the slip joint hole section that sets gradually in the threaded hole section, and the taper hole section is close to the one end diameter of slip joint hole section and is less than the other end, lets press the mound pipe to be located the taper hole section, and lets the external diameter that presses the mound pipe be greater than slip joint hole section internal diameter 1~2 mm.
2. The novel in-hole yielding full-anchor cable according to claim 1, wherein: a first sealing ring (44) is arranged between the threaded sleeve and the yielding pier tube.
3. The novel in-hole yielding full-anchor cable as claimed in claim 1 or 2, wherein: a second sealing ring (45) is arranged between one end of the outer sleeve pipe far away from the pulp outlet section and the isolation sleeve pipe.
4. The novel in-hole yielding full-anchor cable according to claim 3, wherein: one end of the outer sleeve pipe, which is far away from the grout outlet section, is provided with a sealing table extending towards the cable body, and the side surface of the sealing table, which faces the sliding connection hole section, is a conical surface; the second sealing ring comprises an integrally formed conical ring and a column ring, the conical surface of the conical ring is matched with the conical surface of the sealing platform, the column ring extends between the isolation sleeve and the sealing platform, the outer diameter of the column ring is matched with the inner diameter of the sealing platform, and a through hole which penetrates through the conical ring and the column ring and is matched with the outer diameter of the isolation sleeve is further formed in the second sealing ring.
5. The novel in-hole yielding full-anchor cable according to claim 1, wherein: the slurry outlet section comprises a slurry outlet hollow steel pipe (131) and a steel wire (2) twisted on the outer surface of the slurry outlet hollow steel pipe, a first through hole matched with the slurry outlet hollow steel pipe and a plurality of steel wire through holes which are positioned on the periphery of the first through hole and matched with the steel wire are arranged on the threaded sleeve;
the grouting section comprises a hollow grouting core pipe (121) and steel wires twisted on the outer surface of the hollow grouting core pipe, a second through hole matched with the hollow grouting core pipe is formed in the yielding pier pipe, and a plurality of steel wire penetrating holes are formed in the periphery of the second through hole and matched with the steel wires.
6. The novel in-hole yielding full-anchor cable according to claim 5, wherein: and a limiting bulge larger than the steel wire passing hole is arranged on the steel wire between the threaded sleeve and the yielding pier tube.
7. The novel in-hole yielding full-anchor cable according to claim 1, wherein: a lubricating layer is arranged between the isolation sleeve and the cable body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120292065.3U CN214836457U (en) | 2021-02-02 | 2021-02-02 | Novel downthehole yielding full-anchor cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120292065.3U CN214836457U (en) | 2021-02-02 | 2021-02-02 | Novel downthehole yielding full-anchor cable |
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| Publication Number | Publication Date |
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| CN214836457U true CN214836457U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120292065.3U Active CN214836457U (en) | 2021-02-02 | 2021-02-02 | Novel downthehole yielding full-anchor cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183180A (en) * | 2021-12-17 | 2022-03-15 | 辽宁有色勘察研究院有限责任公司 | Down-placing tool and down-placing method for deep hole cross-fault Newton force NPR anchor cable |
| CN115182765A (en) * | 2022-09-14 | 2022-10-14 | 北京中矿创新联盟能源环境科学研究院 | Slip casting NPR anchor cable |
-
2021
- 2021-02-02 CN CN202120292065.3U patent/CN214836457U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183180A (en) * | 2021-12-17 | 2022-03-15 | 辽宁有色勘察研究院有限责任公司 | Down-placing tool and down-placing method for deep hole cross-fault Newton force NPR anchor cable |
| CN115182765A (en) * | 2022-09-14 | 2022-10-14 | 北京中矿创新联盟能源环境科学研究院 | Slip casting NPR anchor cable |
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