CN112360532A - Tunnel sectional type anchor rope that shears - Google Patents
Tunnel sectional type anchor rope that shears Download PDFInfo
- Publication number
- CN112360532A CN112360532A CN202011367152.7A CN202011367152A CN112360532A CN 112360532 A CN112360532 A CN 112360532A CN 202011367152 A CN202011367152 A CN 202011367152A CN 112360532 A CN112360532 A CN 112360532A
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- China
- Prior art keywords
- sections
- anchoring
- anchor cable
- annular
- roadway
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Classifications
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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
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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
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention discloses a roadway sectional type shear anchor cable which comprises a plurality of anchoring sections and a plurality of connecting sections, wherein the anchoring sections and the connecting sections are arranged at intervals and are mutually connected to form the whole anchor cable; the anchor cable has a structure connected in sections and has set connection elasticity, so that the anchor cable has good adaptability in the tensioning direction, and meanwhile, the movably connected structure also has good adaptability to resisting shearing force; due to the adoption of the segmental movable connection structure, the anchor cable and the anchor rod have the characteristics of an anchor cable and an anchor rod, can be kept from losing efficacy under the action of sharp and violent ground pressure after anchoring, have better bending resistance, shearing resistance and tensile strength, have stable anchoring force, have better adaptability to roadway deformation and surrounding rock movement, and finally are beneficial to ensuring the safety of coal mine production.
Description
Technical Field
The invention relates to the field of slope support, in particular to a roadway sectional type shear anchor cable.
Background
Coal mines in China are mainly mined underground, a large number of roadways need to be excavated underground, and roadway support is an important factor for ensuring smoothness and process safety.
Among various support modes, anchor rod (anchor cable) support is the main support mode which is the first choice of roadway, safe and efficient.
In the prior art, the anchor rod or the anchor cable is single in structure and anchoring mode; in fact, the topography around the roadway is different, and the stress condition is complex, so that complex impact force can be generated on the anchored anchor cable or anchor rod, for example, rock burst, and sharp impact force can be generated on the anchor rod, and the impact force is converted into instant tension, shear force and the like, so that the anchor cable or anchor rod is broken and fails, and the roadway has many potential safety hazards.
Therefore, the existing anchor rod or anchor cable structure needs to be improved, the anchor rod or anchor cable can be kept from failure under the action of relatively sharp and violent ground pressure, the anchor rod or anchor cable has relatively good bending resistance, shearing resistance and tensile strength, has stable anchoring force, has relatively good adaptability to roadway deformation and surrounding rock movement, and is finally beneficial to ensuring the safety of coal mine production.
Disclosure of Invention
In view of the above, the invention provides a roadway sectional type shear anchor cable, which has the common characteristics of an anchor cable and an anchor rod, can keep failure under the action of relatively sharp and violent ground pressure after anchoring, has relatively good bending resistance, shear resistance and tensile resistance, has stable anchoring force, has relatively good adaptability to roadway deformation and surrounding rock movement, and is finally beneficial to ensuring the safety of coal mine production.
The roadway sectional type shear anchor cable comprises a plurality of anchoring sections and a plurality of connecting sections, wherein the anchoring sections and the connecting sections are arranged at intervals and are connected with each other to form the whole anchor cable, and the connecting sections are movably connected with the anchoring sections and have elasticity in the tensioning direction.
Furthermore, the anchoring sections are of cylindrical structures and are fixedly provided with annular inner convex seats close to two ends of the inner circle, the connecting sections are of cylindrical structures, two ends of each connecting section penetrate through the annular inner convex seats of the adjacent anchoring sections and are coaxially sleeved into the anchoring sections, the end parts of the connecting sections penetrating through the annular inner convex seats are fixedly provided with annular outer convex seats, and pressure springs are arranged between the annular inner convex seats and the corresponding annular outer convex seats to enable the adjacent connecting sections and the anchoring sections to be connected in an elastic abutting mode.
Further, the annular inner convex seat and the corresponding annular outer convex seat are engaged at least in an anchoring state through the end face cam engagement pair.
Further, the engaging directions of the adjacent end cam engaging pairs are opposite.
Further, the outer surface of the anchor segment is finned along its length.
Furthermore, a positioning spring is arranged in the inner space of the anchoring section, and two ends of the positioning spring respectively and correspondingly abut against the annular convex seats of the two connecting sections connected with the anchoring section.
Furthermore, the end cam meshing pair comprises an anchoring section end cam arranged on the annular inner convex seat and a connecting section end cam arranged on the annular outer convex seat and meshed with the anchoring section end cam.
Further, the anchoring section end face cam is directly positioned on the axial inner side end face of the annular inner convex seat, the annular inner convex seat close to the outer circle of the annular outer convex seat axially extends to form an annular cylinder seat, and the connecting section end face cam is formed on the end face of the annular cylinder seat; the compression spring is positioned in the inner space of the annular cylinder seat and sleeved outside the connecting section.
Furthermore, the anchoring section is formed by combining and fixedly connecting two half sections of anchoring sections, and the annular inner convex seat is directly formed on the corresponding half anchoring section; alternatively, the annular inner boss is fixedly connected with the anchoring section.
The invention has the beneficial effects that: the roadway sectional type shear-resistant anchor cable disclosed by the invention adopts a structure connected in sections and has set connection elasticity, so that the anchor cable has better adaptability in a tensioning direction, and meanwhile, the movably connected structure also has better adaptability to resisting shearing force; due to the adoption of the segmental movable connection structure, the anchor cable and the anchor rod have the characteristics of an anchor cable and an anchor rod, can be kept from losing efficacy under the action of sharp and violent ground pressure after anchoring, have better bending resistance, shearing resistance and tensile strength, have stable anchoring force, have better adaptability to roadway deformation and surrounding rock movement, and finally are beneficial to ensuring the safety of coal mine production.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a cross-sectional view of a cable bolt construction according to the present invention;
FIG. 2 is a sectional view of the structure taken along line A-A in FIG. 1;
fig. 3 is a schematic view of the end cam pair in an expanded state.
Detailed Description
Fig. 1 is a sectional view of a cable bolt structure of the present invention, fig. 2 is a sectional view of the structure along the direction of a-a in fig. 1, and fig. 3 is an expanded schematic view of an end cam pair, as shown in the figure: the roadway sectional type shear anchor cable comprises a plurality of anchoring sections 1 and a plurality of connecting sections 2, wherein the anchoring sections 1 and the connecting sections 2 are arranged at intervals and are connected with each other to form the whole anchor cable, and the connecting sections are movably connected with the anchoring sections and have elasticity in the tensioning direction;
the movable connection means that the anchor cable and the anchor cable are not fixedly connected, an anchor cable structure is formed after the anchor cable and the anchor cable are connected, a certain limit is required to be formed in the transverse direction, a sufficient movable space is reserved, meanwhile, the length direction has set elasticity, and the elastic range covers the anchor tension range of the anchor cable, so that the anchor cable can still adapt to deformation and length change when the anchor region is subjected to impact of sharp tension and shearing force.
In this embodiment, the anchoring segment 1 is a cylindrical structure and is fixedly provided with annular inner convex seats 101 near two ends of an inner circle, the connecting segment 2 is a cylindrical structure, two ends of the connecting segment 2 penetrate through the annular inner convex seats 101 of the adjacent anchoring segments 1 and are coaxially sleeved into the anchoring segments 1, an annular outer convex seat 201 penetrates through the end part of the annular inner convex seat 101 and is fixedly provided, and a pressure spring 3 is arranged between the annular inner convex seat 101 and the corresponding annular outer convex seat 201 to enable the adjacent connecting segment 2 and the anchoring segment 1 to form elastic abutting connection; structurally, the connecting section 2 is sleeved in the anchoring section 1, a certain gap is formed between the annular convex seat 201 and the inner circle of the anchoring section 1 in the transverse direction (in the radial direction), so that a certain transverse displacement amount is ensured, the front shearing movement is adapted, meanwhile, the relative rotation can be generated between the anchoring section and the connecting section by the connecting mode, the torsion moment generated by the movement and deformation of surrounding rocks is offset, and finally, the connecting section can adapt to various impact forces formed around a roadway in an all-round mode.
In this embodiment, at least in the anchoring state, the annular inner convex seat 101 and the corresponding annular outer convex seat 201 are engaged by the end cam engagement pair 5, the end cam engagement pair 5 has end inclined surfaces (as shown in fig. 3) engaged with each other, when the rotation occurs, the axial relative approaching or gradually distant movement occurs between the anchoring section and the connecting section under the action of the engagement inclined surfaces, and a good anchoring force is still maintained due to the existence of the compression spring; meanwhile, the end face cam meshing pair enables a hard contact inclined plane to be formed between the anchoring section and the connecting section, so that the stress of the pressure spring is kept in the axial direction, and even if the pressure spring is deflected under the action of shearing force, the stress is still in the axial direction, and the good stress of the whole anchor cable is guaranteed.
In this embodiment, the engaging directions of the adjacent end face cam engaging pairs 5 are opposite, and the opposite engaging directions prevent the anchor segment and the connecting segment from rotating relatively when the anchor cable is tensioned, so that even if the anchor cable rotates relatively under the action of a complex external force or deforms and elongates under the action of the complex external force, the anchor cable still has hard contact due to the existence of the engaging inclined plane and the pressure spring, thereby maintaining the integrity of the anchor cable; due to the existence of the end surface meshing pair and the arrangement of the pressure spring, the whole anchor cable has good characteristics in the aspects of length and transverse deformation, and can adapt to complex geological deformation and sudden and sharp impact force; the adjacent end face cam meshing pairs refer to end face cam meshing pairs which are adjacent to each other in the length direction of the anchor cable, namely two ends of the anchor section are respectively connected with one connecting section, an end face cam meshing pair is arranged between each two connecting sections, the meshing directions of the two end face cam meshing pairs are opposite, and meanwhile, the meshing directions of the end face cam meshing pairs corresponding to the two ends of the connecting sections are also opposite; the engaging direction here can be understood as the slope rotation direction of the end cam engaging pair, and will not be described in detail here.
In this embodiment, the fins 102 are formed on the outer surface of the anchoring segment 1 along the length direction thereof, and after anchoring, the fins 102 rotate with changes when the geological conditions around the roadway deform, so that the anchoring characteristic of the whole anchor cable is maintained, and large distortion deformation is avoided; particularly, under the condition that the engaging directions of the end face cam engaging pairs are opposite, the anchoring sections cannot change the length of the whole anchor cable when rotating under the action of surrounding rocks, and therefore the integral anchoring force is guaranteed.
In this embodiment, a positioning spring 4 is disposed in the inner space of the anchoring section 1, and two ends of the positioning spring 4 respectively abut against the annular convex seats 201 of the two connecting sections 2 connected to the anchoring section 1; as shown in the figure, the two ends of the positioning spring abut against the corresponding annular convex seats, so that the anchor cable has integrity, is convenient to install and use, and is also favorable for positioning between the connecting section and the anchoring section after anchoring.
In this embodiment, the end cam engagement pair 5 includes an anchoring section end cam 502 provided on the annular inner convex seat and a connecting section end cam 501 provided on the annular outer convex seat 201 and engaged with the anchoring section end cam; as shown in fig. 3, the anchor section end cam 502 is a cam (which may be understood as helical teeth) disposed on an axial end surface of the annular inner convex seat of the anchor section, and of course, the connecting section end cam is a cam (which may be understood as helical teeth) disposed on an axial end surface of the annular outer convex seat of the connecting section, and the engagement between the inclined surfaces and the inclined surfaces is an end cam engagement pair.
In this embodiment, the anchor segment end cam 502 is directly located on the axially inner end surface of the annular inner convex seat 201, as shown, the anchor segment end cam 502 is directly formed by the existing machining method such as casting or milling, and the inner side refers to the direction axially inward of the anchor segment; an annular cylinder base 2011 is formed by axially extending an annular inner convex base which is close to the outer circle of the annular outer convex base and corresponds to the outer circle, and the connecting section end face cam 501 is formed on the end face of the annular cylinder base 2011; the pressure spring 3 is positioned in the inner space of the annular cylinder base 2011 and is sleeved outside the connecting section 2; the whole structure is simple and complete, and a good limiting stress effect is achieved.
In this embodiment, the anchoring section 1 is formed by combining and fixedly connecting two half anchoring sections 1a and 1b, the annular inner convex seat is directly formed on the corresponding half anchoring section, and the two half anchoring sections are respectively manufactured, assembled and welded in a centralized manner, that is, the two half anchoring sections are butt-jointed and welded after the corresponding connecting section compression spring is sleeved in the corresponding half anchoring section; of course, the connection segment itself may be formed by assembly welding or machining, and will not be described herein again;
of course, the anchoring section 1 may also be an integral structure, and the annular inner convex seat and the anchoring section are manufactured separately and fixedly connected, or may be welded. Mechanical connections, etc. are acceptable in the prior art for secure attachment in the anchored condition and will not be described in detail herein.
When the anchor cable is used, the anchor cable (the end head can be designed additionally) is stretched into the anchor hole, corresponding anchor materials are poured outside to anchor in a conventional mode, different numbers of anchor sections and connecting sections can be cut according to the length, and the repeated description is omitted.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides a tunnel sectional type anchor rope that shears which characterized in that: the anchor cable comprises a plurality of anchor sections and a plurality of connecting sections, wherein the anchor sections and the connecting sections are arranged at intervals and are connected with each other to form the whole anchor cable, and the connecting sections are movably connected with the anchor sections and have elasticity in the tensioning direction.
2. The roadway segmented shear anchor cable of claim 1, wherein: the anchoring sections are of cylindrical structures, annular inner convex seats are fixedly arranged at two ends close to the inner circle, the connecting sections are of cylindrical structures, two ends of each connecting section penetrate through the annular inner convex seats of the adjacent anchoring sections and are coaxially sleeved into the anchoring sections, the end parts of the connecting sections penetrating through the annular inner convex seats are fixedly provided with the annular outer convex seats, and pressure springs are arranged between the annular inner convex seats and the corresponding annular outer convex seats to enable the adjacent connecting sections and the anchoring sections to be connected in an elastic abutting mode.
3. The roadway segmented shear anchor cable of claim 2, wherein: the annular inner convex seats and the corresponding annular outer convex seats are meshed at least in an anchoring state through end face cam meshing pairs.
4. The roadway segmented shear anchor cable of claim 3, wherein: the engaging directions of the adjacent end face cam engaging pairs are opposite.
5. The roadway segmented shear anchor cable of claim 3, wherein: the outer surface of the anchor segment is finned along its length.
6. The roadway segmented shear anchor cable of claim 2, wherein: and a positioning spring is arranged in the inner space of the anchoring section, and two ends of the positioning spring respectively and correspondingly abut against the annular convex seats of the two connecting sections connected with the anchoring section.
7. The roadway segmented shear anchor cable of claim 3, wherein: the end face cam meshing pair comprises an anchoring section end face cam arranged on the annular inner convex seat and a connecting section end face cam arranged on the annular outer convex seat and meshed with the anchoring section end face cam.
8. The roadway segmented shear anchor cable of claim 7, wherein: the anchoring section end face cam is directly positioned on the axial inner side end face of the annular inner convex seat, the annular inner convex seat close to the outer circle of the annular outer convex seat axially extends to form an annular cylinder seat, and the connecting section end face cam is formed on the end face of the annular cylinder seat; the compression spring is positioned in the inner space of the annular cylinder seat and sleeved outside the connecting section.
9. The roadway segmented shear anchor cable of claim 3, wherein: the anchoring section is formed by combining and fixedly connecting two sections of half anchoring sections, and the annular inner convex seat is directly formed on the corresponding half anchoring section; alternatively, the annular inner boss is fixedly connected with the anchoring section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367152.7A CN112360532B (en) | 2020-11-29 | 2020-11-29 | Tunnel sectional type anchor rope that shears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367152.7A CN112360532B (en) | 2020-11-29 | 2020-11-29 | Tunnel sectional type anchor rope that shears |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360532A true CN112360532A (en) | 2021-02-12 |
| CN112360532B CN112360532B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011367152.7A Active CN112360532B (en) | 2020-11-29 | 2020-11-29 | Tunnel sectional type anchor rope that shears |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675742Y (en) * | 2003-07-30 | 2005-02-02 | 柳州欧维姆机械股份有限公司 | Distributed prestress finished anchor cable |
| CN103643977A (en) * | 2013-11-21 | 2014-03-19 | 中国矿业大学 | Full-anchor partition pressure transferring grouting anchor rod and application method thereof |
| CN206571514U (en) * | 2017-03-17 | 2017-10-20 | 湖南科技大学 | A kind of segmented large deformation pressure-relieving achor bar |
| CN206655711U (en) * | 2016-12-14 | 2017-11-21 | 山东科技大学 | One kind, which allows, presses large deformation anchor rod |
| CN109798142A (en) * | 2019-03-25 | 2019-05-24 | 中铁第四勘察设计院集团有限公司 | It is a kind of with allowing the mountable long anchor pole of pressure function |
| CN110761281A (en) * | 2019-10-30 | 2020-02-07 | 湖南科技大学 | Coaxial pre-adjusting type partial pressure anchor rod |
-
2020
- 2020-11-29 CN CN202011367152.7A patent/CN112360532B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675742Y (en) * | 2003-07-30 | 2005-02-02 | 柳州欧维姆机械股份有限公司 | Distributed prestress finished anchor cable |
| CN103643977A (en) * | 2013-11-21 | 2014-03-19 | 中国矿业大学 | Full-anchor partition pressure transferring grouting anchor rod and application method thereof |
| CN206655711U (en) * | 2016-12-14 | 2017-11-21 | 山东科技大学 | One kind, which allows, presses large deformation anchor rod |
| CN206571514U (en) * | 2017-03-17 | 2017-10-20 | 湖南科技大学 | A kind of segmented large deformation pressure-relieving achor bar |
| CN109798142A (en) * | 2019-03-25 | 2019-05-24 | 中铁第四勘察设计院集团有限公司 | It is a kind of with allowing the mountable long anchor pole of pressure function |
| CN110761281A (en) * | 2019-10-30 | 2020-02-07 | 湖南科技大学 | Coaxial pre-adjusting type partial pressure anchor rod |
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| Publication number | Publication date |
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| CN112360532B (en) | 2023-04-07 |
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