CN113897956A - Assembled damping yielding anchor and construction method - Google Patents
Assembled damping yielding anchor and construction method Download PDFInfo
- Publication number
- CN113897956A CN113897956A CN202111289334.1A CN202111289334A CN113897956A CN 113897956 A CN113897956 A CN 113897956A CN 202111289334 A CN202111289334 A CN 202111289334A CN 113897956 A CN113897956 A CN 113897956A
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- Prior art keywords
- cover body
- clamping
- clamping groove
- anchor
- anchor rod
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- 238000013016 damping Methods 0.000 title claims abstract description 19
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 101100387915 Caenorhabditis elegans dop-4 gene Proteins 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Clamps And Clips (AREA)
Abstract
The invention relates to the technical field of yielding anchors, in particular to an assembled damping yielding anchor and a construction method; the invention provides an assembled damping yielding anchor and a construction method, wherein a circular truncated cone-shaped chuck is arranged on an anchor rod and matched with a clamping plate with a tooth-shaped clamping groove and capable of sliding in a cover body, so that when the stress on the anchor changes, the chuck is separated from a first-stage clamping groove and moves to a second-stage clamping groove or a third-stage clamping groove, the chuck generates certain displacement, the stress is released, and yielding is realized; through the relative position of adjustment cardboard and stock, change the stub end and the draw-in groove joint volume of dop, realize the dop and break away from the adjustment of the degree of difficulty, and then the stress variation that this ground tackle can bear of adjustment, improve the application scope of this ground tackle.
Description
Technical Field
The invention relates to the technical field of pressure-yielding anchors, in particular to an assembled damping pressure-yielding anchor and a construction method.
Background
Crush anchors generally refer to anchor or anchor cable structures that are capable of both maintaining a predetermined anchoring force and forming a certain amount of "deformation" to eliminate vibrational energy or accommodate deformation.
The patent number CN201921901850.3 of Chinese utility model discloses an anchor rod tray device applied to the field of geotechnical engineering anchoring support, which comprises a rod body, a nut, a base plate, a clamping head, a clamping groove, a tray shell and rubber particles, wherein the tray shell is made of metal materials, and the rubber particles, the clamping head and three layers of clamping grooves are additionally arranged in the tray, so that when the tray is subjected to impact load or overlarge stress, the tray clamping head can slide into the next layer of clamping groove to generate a certain displacement, the stress is released to a certain degree, the tray is prevented from being damaged, and the supporting effect is influenced; when the clamping head slides into the next layer of clamping groove, the rubber particles are extruded, a good buffering and pressure relief effect can be achieved, the anchoring effect of the anchor rod is guaranteed, and the safety of engineering is improved.
But the block degree of dop and draw-in groove is fixed in this patent, just makes the dop break away from the required stress variation volume of draw-in groove relatively fixed, has restricted this patent suitability, and the flexibility is lower.
Therefore, the inventor designs an assembled damping yielding anchor and a construction method, and aims to solve the problems.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects in the prior art and provides an assembled damping pressure-yielding anchor and a construction method.
(II) technical scheme
An assembled damping yielding anchor comprises a base plate, a cover body, an anchor rod and a fixing nut, wherein one side of the base plate is pressed on a rock wall, and the other side of the base plate is provided with the cover body; the anchor rod penetrates through the cover body and the base plate, and the fixing nut is pushed in from one end of the anchor rod, which is far away from the rock wall, and fixedly connects the anchor rod with the cover body; the anchor rod is provided with a chuck; the chuck is in a round platform structure, one end close to the rock wall is small, and the other end far away from the rock wall is large;
a clamping plate is arranged in the cover body corresponding to one side of the anchor rod, a three-stage clamping groove is arranged on the side, facing the anchor rod, of the clamping plate, and the clamping groove is in a tooth shape corresponding to the shape of the clamping head; the cardboard slides in the cover body, the relative distance of adjustable and stock.
Preferably, the side wall of the cover body penetrates through and is rotatably connected with an adjusting shaft, the clamping plate is provided with a connecting sleeve back to the anchor rod side, and the inner end of the adjusting shaft is provided with threads and is in threaded connection with the connecting sleeve.
Preferably, the outer end of the adjusting shaft is provided with an adjusting hand wheel.
Preferably, the cover body is detachably connected with the backing plate through screws.
Preferably, after the anchorage device is installed, the clamping head is positioned in the clamping groove of the first stage.
Optionally, the device further comprises a warning mechanism; the warning mechanism is positioned on the other side of the anchor rod, is arranged corresponding to the positions of the two rear-stage clamping grooves, and comprises an end block, a moving rod, a pressure spring, a limiting block, an installation frame, a press switch and a warning lamp;
the triangular blocks are positioned in the cover body and are provided with two triangular blocks, wherein one triangular block is arranged corresponding to the second-stage clamping groove, and the other triangular block is arranged corresponding to the third-stage clamping groove; the side of the triangular block facing the anchor rod is an inclined plane; a pressure spring is connected between the side of the triangular block, which is far away from the anchor rod, and the inner wall of the cover body, and the side is also connected with a movable rod which penetrates out of the cover body; a limiting block is arranged on the moving rod, and the limiting block is pressed against the outer wall of the cover body by a pressure spring; the cover body outer wall still is provided with the mounting bracket, and one side of mounting bracket towards the carriage release lever is provided with press switch, opposite side are provided with the warning light, press switch, warning light one to one set of one-to-one, wherein a set of with the carriage release lever cooperation that corresponds the second grade draw-in groove, another a set of with the carriage release lever cooperation that corresponds the third grade draw-in groove.
Optionally, the two warning lights are flashing lights with different colors.
Optionally, when the chuck moves to the second-stage clamping groove, a warning lamp corresponding to the second-stage clamping groove is turned on; when the dop removed third level draw-in groove, the warning light that third level draw-in groove corresponds lights.
A construction method of an assembled shock-absorbing pressure-yielding anchor comprises the following steps,
s1, assembling the glass fiber reinforced plastic composite material,
the anchor rod penetrates through the base plate and the cover body, so that the clamping head is positioned between the base plate and the cover body and is pressed against the base plate; then the cover body is fixedly connected with the base plate through screws, and the clamping head corresponds to the first-stage clamping groove of the clamping plate; rotating the adjusting shaft to enable the clamping plate to be close to the anchor rod, and clamping the clamping head into the clamping groove;
and S2, installing the cable,
the anchor is connected with the rock wall.
Wherein, the relative distance of adjustment cardboard and stock, and then the big end of adjustment dop and draw-in groove joint volume.
(III) advantageous effects
The invention provides an assembled damping yielding anchor and a construction method, wherein a circular truncated cone-shaped chuck is arranged on an anchor rod and matched with a clamping plate with a tooth-shaped clamping groove and capable of sliding in a cover body, so that when the stress on the anchor changes, the chuck is separated from a first-stage clamping groove and moves to a second-stage clamping groove or a third-stage clamping groove, the chuck generates certain displacement, the stress is released, and yielding is realized; through the relative position of adjustment cardboard and stock, change the stub end and the draw-in groove joint volume of dop, realize the dop and break away from the adjustment of the degree of difficulty, and then the stress variation that this ground tackle can bear of adjustment, improve the application scope of this ground tackle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only for the present invention and protect some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a structural view of the card;
FIG. 3 is a block diagram of another embodiment of the present invention (station A);
FIG. 4 is a block diagram of another embodiment of the present invention (station B);
fig. 5 is an enlarged view of fig. 4.
In the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a base plate 1, a cover body 2, an anchor rod 3, a fixing nut 4, a clamping head 5, a clamping plate 6, a connecting sleeve 7, an adjusting shaft 8, a triangular block 9, a moving rod 10, a pressure spring 11, a limiting block 12, a mounting frame 13, a press switch 14 and a warning lamp 15.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and "third," if any, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
An assembled damping yielding anchorage device comprises a base plate 1, a cover body 2, an anchor rod 3 and a fixing nut 4, wherein one side of the base plate 1 is pressed on a rock wall, the cover body 2 is arranged on the other side of the base plate 1, and the cover body 2 and the base plate 1 can be detachably connected through screws due to installation convenience; the anchor rod 3 penetrates through the cover body 2 and the base plate 1, and the fixing nut 4 is pushed in from one end of the anchor rod 3, which is far away from the rock wall, and fixedly connects the anchor rod 3 with the cover body 2; a clamping head 5 is integrally formed on the anchor rod 3; the chuck 5 is in a round table structure, and one end close to the rock wall is small, and the other end far away from the rock wall is large;
a clamping plate 6 is arranged in the cover body 2 corresponding to one side of the anchor rod 3, a three-stage clamping groove is formed in the clamping plate 6 facing the anchor rod 3, and the clamping groove is in a tooth shape corresponding to the shape of the clamping head 5;
the lateral wall of the cover body 2 is penetrated and rotatably connected with an adjusting shaft 8, a connecting sleeve 7 is arranged on the side of the clamping plate 6, which is back to the anchor rod 3, and the inner end of the adjusting shaft 8 is processed with threads and is screwed into the connecting sleeve 7.
Referring to the attached drawings, the other surfaces of the clamping plate 6 are abutted against the inner wall of the cover body, so that the clamping plate cannot rotate and can only slide in the cover body 2, and the relative distance between the clamping plate and the anchor rod 3 is convenient to adjust.
In order to facilitate the force application, an adjusting hand wheel can be arranged at the outer end of the adjusting shaft 8.
The construction method of the pressure-yielding anchorage will be described below in this embodiment,
s1, assembling the glass fiber reinforced plastic composite material,
the anchor rod 3 penetrates through the base plate 1 and the cover body 2, the clamping head 5 is positioned between the base plate 1 and the cover body 2, and the clamping head 5 is propped against the base plate 1; then the cover body 2 is fixedly connected with the base plate 1 through screws, and the clamping head 5 corresponds to the first-stage clamping groove of the clamping plate 6; rotating the adjusting shaft 8 to enable the clamping plate 6 to be close to the anchor rod 3 and clamping the clamping head 5 into the clamping groove;
and S2, installing the cable,
the anchor is connected with the rock wall.
When the stress borne by the anchorage device is increased, the clamping head 4 is separated from the first-stage clamping groove and moves to the second-stage clamping groove; or also disengaged from the second level card slot, to the third level card slot; the displacement is carried out to release the stress and realize yielding.
Refer to the attached drawing, during the construction, the relative distance of adjustable cardboard 6 and stock 3, and then the big head end and the draw-in groove joint volume of adjustment dop 5, wherein the joint volume is big more, and dop 4 breaks away from the degree of difficulty and is higher, and its stress variation that can bear is big more, can improve the application scope of this ground tackle like this.
Example 2
On the basis of the example 1, the method comprises the following steps of,
the device also comprises a warning mechanism; the warning mechanism is positioned on the other side of the anchor rod 3, is arranged corresponding to the positions of the two rear-stage clamping grooves, and comprises an end block, a moving rod 10, a pressure spring 11, a limiting block 12, an installation frame 13, a press switch 14 and a warning lamp 15;
the triangular blocks 9 are positioned in the cover body 2 and are provided with two triangular blocks, wherein one triangular block is arranged corresponding to the second-stage clamping groove, and the other triangular block is arranged corresponding to the third-stage clamping groove; the side of the triangular block 9 facing the anchor rod 3 is an inclined plane; a pressure spring 11 is connected between the side of the triangular block 9 far away from the anchor rod 3 and the inner wall of the cover body 2, the side is also connected with a movable rod 10, and the movable rod 10 penetrates out of the cover body 2; the moving rod 10 is connected with a limiting block 12, and the limiting block 12 is pressed against the outer wall of the cover body 2 by a pressure spring 11; the outer wall of the cover body 2 is further connected with a mounting frame 13, one side of the mounting frame 13 facing the moving rod 10 is provided with a press switch 14, the other side of the mounting frame 13 is provided with a warning lamp 15, the press switch 14 and the warning lamp 15 form a group in a pair mode, one group is matched with the moving rod 10 corresponding to the second-stage clamping groove, and the other group is matched with the moving rod 10 corresponding to the third-stage clamping groove.
Referring to the attached drawings, when the clamping head 5 is separated from the first-stage clamping groove and moves to the second-stage clamping groove, the clamping head and the triangular block 9 at the position act to enable the moving rod 10 to move outwards and press the press switch 14, so that the warning lamp 15 corresponding to the second-stage clamping groove works; similarly, when the clamping head 5 moves to the third-stage clamping groove, the warning lamp 15 corresponding to the third-stage clamping groove is turned on.
Through setting up the warning light to back two-stage draw-in groove, can respond the stress change condition directly perceivedly.
In order to improve the warning effect, the two warning lamps 15 adopt flashing lamps with different colors, so that the distinguishing is convenient.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An assembled damping yielding anchor comprises a base plate (1), a cover body (2), an anchor rod (3) and a fixing nut (4), and is characterized in that one side of the base plate (1) is pressed on a rock wall, and the cover body (2) is arranged on the other side of the base plate (1); the anchor rod (3) penetrates through the cover body (2) and the base plate (1), the fixing nut (4) is pushed in from one end, far away from the rock wall, of the anchor rod (3), and the anchor rod (3) is fixedly connected with the cover body (2); a clamping head (5) is arranged on the anchor rod (3); the clamping head (5) is in a round table structure, and one end close to the rock wall is small, and the other end far away from the rock wall is large;
a clamping plate (6) is arranged in the cover body (2) and corresponds to one side of the anchor rod (3), a three-stage clamping groove is formed in the side, facing the anchor rod (3), of the clamping plate (6), and the clamping groove is in a tooth shape corresponding to the shape of the clamping head (5); the clamping plate (6) slides in the cover body (2), and the relative distance between the clamping plate and the anchor rod (3) can be adjusted.
2. The assembled damping and pressure-yielding anchorage device as claimed in claim 1, wherein the side wall of the cover body (2) is connected with an adjusting shaft (8) in a penetrating and rotating manner, the side of the clamping plate (6) opposite to the anchor rod (3) is provided with a connecting sleeve (7), and the inner end of the adjusting shaft (8) is provided with threads and is screwed into the connecting sleeve (7).
3. The assembled damping and pressure-yielding anchorage device as claimed in claim 2, wherein an adjusting hand wheel is arranged at the outer end of the adjusting shaft (8).
4. The assembled damping and pressure-yielding anchorage device as claimed in claim 1, wherein the cover body (2) is detachably connected with the base plate (1) through screws.
5. The assembled damping and pressure-yielding anchor device as claimed in claim 1, wherein the chuck (5) is located in the first-stage slot after the anchor device is installed.
6. The assembled damping and pressure-yielding anchor device as claimed in claim 1, further comprising a warning mechanism; the warning mechanism is positioned on the other side of the anchor rod (3), is arranged corresponding to the positions of the two rear-stage clamping grooves, and comprises an end block, a moving rod (10), a pressure spring (11), a limiting block (12), an installation frame (13), a press switch (14) and a warning lamp (15);
the triangular blocks (9) are positioned in the cover body (2) and are provided with two triangular blocks, wherein one triangular block is arranged corresponding to the second-stage clamping groove, and the other triangular block is arranged corresponding to the third-stage clamping groove; the side of the triangular block (9) facing the anchor rod (3) is an inclined plane; a pressure spring (11) is connected between the side of the triangular block (9) far away from the anchor rod (3) and the inner wall of the cover body (2), the side is also connected with a movable rod (10), and the movable rod (10) penetrates out of the cover body (2); a limiting block (12) is arranged on the moving rod (10), and the limiting block (12) is abutted against the outer wall of the cover body (2) by the aid of the pressure spring (11); the outer wall of the cover body (2) is further provided with a mounting frame (13), one side, facing the moving rod (10), of the mounting frame (13) is provided with a press switch (14), the other side is provided with a warning lamp (15), the press switch (14) and the warning lamp (15) form a group in a pair mode, one group of the press switch and the warning lamp is matched with the moving rod (10) corresponding to the second-stage clamping groove, and the other group of the press switch and the warning lamp is matched with the moving rod (10) corresponding to the third-stage clamping groove.
7. The assembled damping and pressure-yielding anchorage device as claimed in claim 6, wherein the two warning lights (15) are flashing lights of different colors.
8. The assembled damping pressure-yielding anchorage device according to claim 5, wherein when the clamping head (5) moves to the second-stage clamping groove, the warning lamp (15) corresponding to the second-stage clamping groove is turned on; when the clamping head (5) moves to the third-level clamping groove, the warning lamp (15) corresponding to the third-level clamping groove is turned on.
9. A construction method of an assembled shock-absorbing pressure-yielding anchor device is characterized by comprising the following steps,
s1, assembling the glass fiber reinforced plastic composite material,
the anchor rod (3) penetrates through the base plate (1) and the cover body (2), the clamping head (5) is located between the base plate (1) and the cover body (2), and the clamping head (5) is abutted against the base plate (1); then the cover body (2) is fixedly connected with the base plate (1) through screws, and the clamping head (5) corresponds to the first-stage clamping groove of the clamping plate (6); rotating the adjusting shaft (8) to enable the clamping plate (6) to be close to the anchor rod (3), and clamping the clamping head (5) into the clamping groove;
and S2, installing the cable,
the anchor is connected with the rock wall.
10. The assembled damping and pressure-yielding anchorage device as claimed in claim 9, wherein the relative distance between the clamping plate (6) and the anchor rod (3) is adjusted according to actual requirements, so as to adjust the clamping amount between the large head end of the clamping head (5) and the clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111289334.1A CN113897956A (en) | 2021-11-02 | 2021-11-02 | Assembled damping yielding anchor and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111289334.1A CN113897956A (en) | 2021-11-02 | 2021-11-02 | Assembled damping yielding anchor and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN113897956A true CN113897956A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111289334.1A Pending CN113897956A (en) | 2021-11-02 | 2021-11-02 | Assembled damping yielding anchor and construction method |
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| Country | Link |
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| CN (1) | CN113897956A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117145526A (en) * | 2023-10-31 | 2023-12-01 | 华能煤炭技术研究有限公司 | Constant-resistance large-deformation truss anchor cable supporting device |
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| CN213233807U (en) * | 2020-08-31 | 2021-05-18 | 天津市众恒预应力机械有限公司 | Dragline anchorage device with spherical hinge structure |
| CN213540447U (en) * | 2020-11-07 | 2021-06-25 | 山东科技大学 | High-strength yielding type anchor rod tray |
| CN213812114U (en) * | 2021-01-06 | 2021-07-27 | 安徽皖丰建筑工程有限公司 | Building curtain wall automatic checkout device convenient to installation |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606181A (en) * | 2012-03-19 | 2012-07-25 | 中国矿业大学 | Hyperstatic scour prevention four-dimensional roadway support device and support method thereof |
| CN206928960U (en) * | 2017-05-26 | 2018-01-26 | 中铁十四局集团第二工程有限公司 | A kind of multistage allows pressure to warn anchor pole |
| CN211144540U (en) * | 2019-11-06 | 2020-07-31 | 山东科技大学 | Protecting against shock lets pressure type stock tray |
| CN213233807U (en) * | 2020-08-31 | 2021-05-18 | 天津市众恒预应力机械有限公司 | Dragline anchorage device with spherical hinge structure |
| CN213540447U (en) * | 2020-11-07 | 2021-06-25 | 山东科技大学 | High-strength yielding type anchor rod tray |
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| CN117145526A (en) * | 2023-10-31 | 2023-12-01 | 华能煤炭技术研究有限公司 | Constant-resistance large-deformation truss anchor cable supporting device |
| CN117145526B (en) * | 2023-10-31 | 2024-01-30 | 华能煤炭技术研究有限公司 | Constant-resistance large-deformation truss anchor cable supporting device |
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