CN115355051B - Temporary auxiliary supporting device for underground resource exploration - Google Patents
Temporary auxiliary supporting device for underground resource exploration Download PDFInfo
- Publication number
- CN115355051B CN115355051B CN202210865646.0A CN202210865646A CN115355051B CN 115355051 B CN115355051 B CN 115355051B CN 202210865646 A CN202210865646 A CN 202210865646A CN 115355051 B CN115355051 B CN 115355051B
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- Prior art keywords
- mounting
- blocks
- sliding
- bottom plate
- support
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- 238000009434 installation Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims 1
- 239000003381 stabilizer Substances 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 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
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a temporary auxiliary supporting device for underground resource exploration, which belongs to the field of auxiliary devices for resource exploration. The angle of the temporary auxiliary supporting device can be adjusted at will, the angles, the heights and the positions of the bottom plate, the support legs and the third support can be adjusted rapidly according to special terrains, so that the temporary auxiliary supporting device is uniformly stressed when supporting, can meet the requirements of different terrains, can be detached and stored when not used, can be assembled temporarily when in use, and is simple and rapid to operate.
Description
Technical Field
The invention belongs to the field of auxiliary devices for resource exploration, and particularly relates to a temporary auxiliary supporting device for underground resource exploration.
Background
Underground resources are being explored prior to exploitation and excavation, including various excavation geophysical prospecting and logging methods, such as excavation radioscopy, excavation geological radar measurement, excavation gravity measurement, electrical logging, radioactive logging, sonic logging, gravity logging, magnetic logging in wells, radio wave perspective in wells, and the like. The underground geophysical prospecting is widely applied to petroleum, coal fields, metal and nonmetal exploration, hydrogeology and engineering geological work, and well logging is an indispensable exploration means in oil, gas fields and coal field exploration; in metal deposit exploration, the purpose of in-well magnetic testing is to find blind ore bodies downhole and beside the well, determine ore body shape, extend, connect and study the ore bed structure, and verify ground magnetic anomalies, guide drilling construction, etc.
The special topography needs the manual work to get into in the deep hole and surveys, in order to prevent that the inside of deep hole or entrance to a cave from collapsing, need carry out auxiliary stay before getting into, and conventional support frame is simple bearing structure only, can not be suitable for the needs of different topography, is poor, the atress inhomogeneous to the support effect of different entrance to a cave or inside irregular deep hole, for this reason we propose a interim auxiliary stay device of underground resource exploration and be used for solving above-mentioned problem.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention aims to provide a temporary auxiliary supporting device for underground resource exploration, so as to solve the problems set forth in the background art.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a interim auxiliary stay device of underground resource exploration, interim auxiliary stay device includes symmetric distribution's supporting component, the supporting component passes through the connector and rotates to be connected, and the supporting component includes the bottom plate, and the bottom plate below is equipped with sliding fit's stabilizer blade, and the bottom plate top is equipped with sliding fit's fourth mounting bracket, and fourth mounting bracket top is equipped with the multistage hydraulic cylinder who rotates to be connected.
Preferably, the bottom plate top is equipped with welded first mounting bracket, is equipped with the first spout that runs through in the first mounting bracket, is equipped with the second spout of array distribution on the bottom plate, still is equipped with first mounting groove on the bottom plate, and bottom plate below symmetry is equipped with welded second mounting bracket, is equipped with the third spout that runs through in the second mounting bracket, and third spout both sides all are equipped with the fourth spout that runs through.
Preferably, be equipped with sliding fit's stabilizer blade in the third spout, the stabilizer blade slides to the assigned position and is fixed with the second mounting bracket, and the stabilizer blade both sides all are equipped with first guide block, and first guide block slides along the fourth spout, and the leg below is equipped with fixed connection's screw thread post, and the screw thread post outside is equipped with screw thread complex adjust knob, and the adjust knob lower extreme is equipped with rotates the first mounting panel of connecting, and first mounting panel below is equipped with the third mounting bracket of rotating the connection.
Preferably, the fourth mounting bracket both sides all are equipped with welded second mounting panel, and the fourth mounting bracket is fixed with the bottom plate after sliding to the assigned position, is equipped with the fifth spout that runs through in the fourth mounting bracket, and fourth mounting bracket below is equipped with the sliding block of array distribution, sliding block and second spout sliding fit, are equipped with the first installation piece of array distribution in the fifth spout, first installation piece and fifth spout sliding fit, and first installation piece is fixed with the fourth mounting bracket after moving to the assigned position, and first installation piece top is equipped with the push rod, and push rod one end rotates with first installation piece to be connected.
Preferably, the telescopic end of the multistage hydraulic cylinder is fixedly provided with a second support, a third support which is rotationally connected is arranged above the second support, the outer side of the multistage hydraulic cylinder is provided with a fixed sleeve which is fixedly connected, the other end of the push rod is rotationally connected with the fixed sleeve, the lower end of the multistage hydraulic cylinder is provided with a fourth support which is fixedly connected, a second installation block which is rotationally connected is arranged below the fourth support, the second installation block slides in the first sliding groove, and the second installation block is fixedly connected with the first installation frame after moving to a designated position.
Preferably, the connector comprises symmetrically distributed third mounting plates, fourth mounting plates are arranged below the third mounting plates and mounted in the first mounting grooves, the fourth mounting plates are fixedly connected with the bottom plate, symmetrically distributed bearings are arranged on one sides of the third mounting plates, rotating blocks in rotating connection are arranged between the bearings, rotating rings are arranged on the side faces of the rotating blocks, and the rotating rings are in rotating connection with each other.
The invention has the beneficial effects that:
1. the angle of the temporary auxiliary supporting device can be adjusted at will, the angles, the heights and the positions of the bottom plate, the support legs and the third support can be adjusted rapidly according to special terrains, so that the temporary auxiliary supporting device is uniformly stressed when supporting, can meet the requirements of different terrains, can be detached and stored when not used, can be assembled temporarily when in use, and is simple and rapid to operate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic view of the temporary auxiliary support device of the present invention;
FIG. 2 is a schematic view of a support assembly according to the present invention;
FIG. 3 is a schematic view of the structure of the base plate in the present invention;
FIG. 4 is a schematic view of the structure of the base plate according to the present invention;
FIG. 5 is a schematic view of the leg structure of the present invention;
FIG. 6 is a schematic view of a fourth mounting bracket according to the present invention;
FIG. 7 is a schematic view of a multi-stage hydraulic cylinder according to the present invention;
fig. 8 is a schematic view of a connector structure according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 8, a temporary auxiliary supporting device for underground resource exploration includes symmetrically distributed supporting components, which are rotatably connected by connectors 5.
Further, the support assembly comprises a bottom plate 1, support legs 2, a fourth mounting frame 3 and a multi-stage hydraulic cylinder 4.
Further, be equipped with welded first mounting bracket 11 above bottom plate 1, be equipped with the first spout 111 that runs through in the first mounting bracket 11, first spout 111 both sides all array is equipped with the first locating hole 112 that runs through, be equipped with the second spout 12 that array distributes and the second locating hole 13 that runs through on the bottom plate 1, still be equipped with first mounting groove 14 on the bottom plate 1, be equipped with the first screw rod 141 that array distributes in the first mounting groove 14, be equipped with screw-thread fit's first fastening nut 142 on the first screw rod 141, bottom plate 1 below symmetry is equipped with welded second mounting bracket 15, be equipped with the third spout 151 that runs through in the second mounting bracket 15, third spout 151 both sides all are equipped with the fourth spout 152 that runs through and the third locating hole 153 that array distributes.
Further, the third chute 151 is internally provided with the support leg 2 in sliding fit, both sides of the support leg 2 are respectively provided with the first guide block 21, the first guide block 21 slides along the fourth chute 152, the support leg 2 is internally provided with the fourth positioning hole 22 penetrating through, the fourth positioning hole 22 is internally provided with the first positioning shaft 23, the first positioning shaft 23 penetrates through the third positioning hole 153, the first positioning shaft 23 fixedly connects the support leg 2 with the second mounting frame 15, one end of the first positioning shaft 23 is provided with the pull buckle 231, the first positioning shaft 23 is provided with the second fastening nut 232 in threaded fit, the lower part of the support leg 2 is provided with the threaded column 24 in fixed connection, the outer side of the threaded column 24 is provided with the adjusting knob 25 in threaded fit, the lower end of the adjusting knob 25 is provided with the first mounting plate 251 in rotating connection, both sides of the first mounting plate 251 are respectively provided with the first rotating shaft 252, the lower part of the first mounting plate 251 is provided with the third mounting frame 26, the first bracket 261 is fixedly connected above the third mounting frame 26, the first bracket 261 is provided with the first penetrating opening 262, the first mounting plate 251 is mounted in the first bracket 261, and the first rotating shaft 252 is in rotating connection with the first opening 262.
Further, the fourth mounting frame 3 with sliding fit is arranged above the bottom plate 1, welded second mounting plates 31 are arranged on two sides of the fourth mounting frame 3, fifth positioning holes 311 distributed in an array are arranged on the second mounting plates 31, after the fourth mounting frame 3 slides to a designated position, a second positioning shaft penetrates through the fifth positioning holes 311 and is arranged in the second positioning holes 13, so that the fourth mounting frame 3 is fixedly connected with the bottom plate 1, a fifth through chute 32 is arranged in the fourth mounting frame 3, sixth positioning holes 321 distributed in an array are arranged on two sides of the fifth chute 32, sliding blocks 33 distributed in an array are arranged below the fourth mounting frame 3, the sliding blocks 33 are in sliding fit with the second chute 12, first mounting blocks 34 distributed in an array are arranged in the fifth chute 32, the first mounting blocks 34 are in sliding fit with the fifth chute 32, seventh through positioning holes are arranged in the first mounting blocks 34, the third positioning shaft penetrates through the sixth positioning holes 321, the seventh positioning holes are used for fixing the first mounting blocks 34 at the designated positions in the fifth chute 32, first mounting blocks 34 are arranged above the first mounting blocks 341, first grooves 341 are arranged on two sides of the first grooves 341, the first grooves 33 are arranged on the first grooves 33, the second grooves 35 are arranged on the second grooves 35 are symmetrically, and the other ends of the second grooves 35 are symmetrically distributed on the second shafts 351 are arranged, and the rotating shafts 35 are symmetrically arranged at the other ends of the rotating shafts 35.
Further, a second bracket 41 is fixedly arranged on the telescopic end of the multi-stage hydraulic cylinder 4, a penetrating second slot 411 is arranged in the second bracket 41, third holes 412 are formed in two sides of the second slot 411, a rotating third bracket 42 is arranged in the second slot 411, fourth rotating shafts 421 are respectively arranged on two sides of the third bracket 42, the fourth rotating shafts 421 are rotationally connected with the third holes 412, a fixed sleeve 43 is fixedly connected with the outer side of the multi-stage hydraulic cylinder 4, a seventh hole 431 is formed in the side face of the fixed sleeve 43, the third rotating shafts 352 are rotationally connected with the seventh hole 431, a fourth bracket 44 is fixedly connected with the lower end of the multi-stage hydraulic cylinder 4, fifth rotating shafts 45 are respectively arranged on two sides of the fourth bracket 44, a second mounting block 46 is arranged below the fourth bracket 44, the second mounting block 46 slides in the first chute 111, penetrating eighth positioning holes 461 are respectively arranged in the second mounting block 46, and the fourth positioning shafts penetrate through the first positioning holes 112 and the eighth positioning holes 461 so as to fix the second mounting block 46 at the appointed position in the first chute 111, a third slot 462 is arranged above the second mounting block 46, and the fourth positioning blocks 462 are rotationally connected with the fourth holes 463.
Further, the connector 5 includes a third mounting plate 51 symmetrically distributed, fifth openings distributed in an array are all provided on the third mounting plate 51, a fourth mounting plate 52 is all provided below the third mounting plate 51, sixth openings 521 and a second screw 522 distributed in an array are provided on the fourth mounting plate 52, the second screw 522 passes through the fifth openings, third fastening nuts 523 in threaded engagement are all provided on the second screw 522, the third fastening nuts 523 are screwed to fixedly connect the third mounting plate 51 with the fourth mounting plate 52, the fourth mounting plate 52 is mounted in the first mounting groove 14, the first screw 141 passes through the sixth openings 521, the first fastening nuts 142 are screwed to fixedly connect the fourth mounting plate 52 with the base plate 1, symmetrically distributed bearings 511 are provided on one side of the third mounting plate 51, a rotating block 53 in rotating connection is provided between the bearings 511, and the side faces of the rotating blocks 53 are both provided with rotating rings 54, and the rotating rings 54 are in rotating connection with each other.
Working principle:
during the use, equipment connector 5, then with connector 5 and supporting component fixed connection, adjust the position of stabilizer blade 2, multistage hydraulic cylinder 4 according to the shape of cave to and the height of stabilizer blade 2, the angle of third mounting bracket 26, third mounting bracket 26 is placed in the cave lower extreme, adjusts the position of fourth mounting bracket 3 and promotes multistage hydraulic cylinder 4 and adjust appointed angle, drives multistage hydraulic cylinder 4 through the oil pump and promotes third support 42 and rise, and third support 42 withstands cave upper portion, and interim auxiliary stay device wholly supports the cave.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (2)
1. The temporary auxiliary supporting device for underground resource exploration comprises symmetrically distributed supporting components, and is characterized in that the supporting components are rotationally connected through connectors (5), each supporting component comprises a bottom plate (1), support legs (2) in sliding fit are arranged below the bottom plates (1), a fourth installation frame (3) in sliding fit is arranged above the bottom plates (1), and a multistage hydraulic cylinder (4) in rotational connection is arranged above the fourth installation frame (3);
the novel anti-theft device is characterized in that a welded first mounting frame (11) is arranged above the bottom plate (1), a penetrating first sliding groove (111) is formed in the first mounting frame (11), second sliding grooves (12) distributed in an array mode are formed in the bottom plate (1), a first mounting groove (14) is formed in the bottom plate (1), welded second mounting frames (15) are symmetrically arranged below the bottom plate (1), a penetrating third sliding groove (151) is formed in the second mounting frame (15), and penetrating fourth sliding grooves (152) are formed in two sides of the third sliding groove (151);
the third sliding groove (151) is internally provided with a support leg (2) in sliding fit, the support leg (2) slides to a designated position and is fixed with the second mounting frame (15), both sides of the support leg (2) are respectively provided with a first guide block (21), the first guide blocks (21) slide along the fourth sliding groove (152), the lower part of the support leg (2) is provided with a fixedly connected threaded column (24), the outer side of the threaded column (24) is provided with an adjusting knob (25) in threaded fit, the lower end of the adjusting knob (25) is provided with a first mounting plate (251) in rotary connection, and the lower part of the first mounting plate (251) is provided with a third mounting frame (26) in rotary connection;
the welding device is characterized in that welded second mounting plates (31) are arranged on two sides of the fourth mounting frame (3), the fourth mounting frame (3) is fixed with the bottom plate (1) after sliding to a designated position, a fifth through chute (32) penetrating through is arranged in the fourth mounting frame (3), sliding blocks (33) distributed in an array are arranged below the fourth mounting frame (3), the sliding blocks (33) are in sliding fit with the second through chute (12), first mounting blocks (34) distributed in an array are arranged in the fifth through chute (32), the first mounting blocks (34) are in sliding fit with the fifth through chute (32), the first mounting blocks (34) are fixed with the fourth mounting frame (3) after moving to the designated position, push rods (35) are arranged above the first mounting blocks (34), and one ends of the push rods (35) are in rotating connection with the first mounting blocks (34);
the telescopic end of the multistage hydraulic cylinder (4) is fixedly provided with a second support (41), a third support (42) connected in a rotating mode is arranged above the second support (41), a fixed sleeve (43) connected in a fixed mode is arranged outside the multistage hydraulic cylinder (4), the other end of the push rod (35) is connected with the fixed sleeve (43) in a rotating mode, the lower end of the multistage hydraulic cylinder (4) is provided with a fourth support (44) connected in a fixed mode, a second installation block (46) connected in a rotating mode is arranged below the fourth support (44), the second installation block (46) slides in the first sliding groove (111), and the second installation block (46) moves to a designated position and then is fixedly connected with the first installation frame (11).
2. The temporary auxiliary supporting device for underground resource exploration according to claim 1, wherein the connector (5) comprises third mounting plates (51) which are symmetrically distributed, fourth mounting plates (52) are arranged below the third mounting plates (51), the fourth mounting plates (52) are arranged in the first mounting grooves (14), the fourth mounting plates (52) are fixedly connected with the bottom plate (1), symmetrically distributed bearings (511) are arranged on one side of the third mounting plates (51), rotating blocks (53) which are rotationally connected are arranged between the bearings (511), rotating rings (54) are arranged on the side faces of the rotating blocks (53), and the rotating rings (54) are rotationally connected with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865646.0A CN115355051B (en) | 2022-07-21 | 2022-07-21 | Temporary auxiliary supporting device for underground resource exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865646.0A CN115355051B (en) | 2022-07-21 | 2022-07-21 | Temporary auxiliary supporting device for underground resource exploration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115355051A CN115355051A (en) | 2022-11-18 |
| CN115355051B true CN115355051B (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210865646.0A Active CN115355051B (en) | 2022-07-21 | 2022-07-21 | Temporary auxiliary supporting device for underground resource exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115355051B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207377586U (en) * | 2017-10-18 | 2018-05-18 | 沈阳天安科技股份有限公司 | Stope drift active workings lateral support formula advance support rack |
| CN108643945A (en) * | 2018-05-14 | 2018-10-12 | 陈玉玲 | A kind of height-adjustable coal mine roadway suspension device |
| CN212837872U (en) * | 2020-04-25 | 2021-03-30 | 杨鹏 | Variable shield support for opposite mining |
| CN213654878U (en) * | 2020-09-25 | 2021-07-09 | 蓝春明 | Tunnel construction is with preventing strutting arrangement that collapses |
| CN216342233U (en) * | 2021-11-24 | 2022-04-19 | 浙江数智交院科技股份有限公司 | Tunnel supporting device |
-
2022
- 2022-07-21 CN CN202210865646.0A patent/CN115355051B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207377586U (en) * | 2017-10-18 | 2018-05-18 | 沈阳天安科技股份有限公司 | Stope drift active workings lateral support formula advance support rack |
| CN108643945A (en) * | 2018-05-14 | 2018-10-12 | 陈玉玲 | A kind of height-adjustable coal mine roadway suspension device |
| CN212837872U (en) * | 2020-04-25 | 2021-03-30 | 杨鹏 | Variable shield support for opposite mining |
| CN213654878U (en) * | 2020-09-25 | 2021-07-09 | 蓝春明 | Tunnel construction is with preventing strutting arrangement that collapses |
| CN216342233U (en) * | 2021-11-24 | 2022-04-19 | 浙江数智交院科技股份有限公司 | Tunnel supporting device |
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| Publication number | Publication date |
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| CN115355051A (en) | 2022-11-18 |
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