CN114060070A - Supporting device for underground narrow tunnel construction engineering - Google Patents
Supporting device for underground narrow tunnel construction engineering Download PDFInfo
- Publication number
- CN114060070A CN114060070A CN202010822530.XA CN202010822530A CN114060070A CN 114060070 A CN114060070 A CN 114060070A CN 202010822530 A CN202010822530 A CN 202010822530A CN 114060070 A CN114060070 A CN 114060070A
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- support
- supporting
- construction engineering
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000746 Structural steel Inorganic materials 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a supporting device for underground narrow roadway construction engineering, which comprises a mine supporting net, an extension sleeve plate, supporting columns, a positioning threaded rod, a supporting seat and a longitudinal supporting rod, wherein the supporting columns are clamped and sleeved on the lower sides inside the supporting sleeve rods, the positioning threaded rod is inserted into the supporting columns, the extension sleeve plate is installed on the upper end face of a fixed angle iron, the mine supporting net is welded on the upper end face of the supporting sleeve rod, the supporting seats are symmetrically welded on the front end face and the rear end face of the supporting sleeve rod, and the longitudinal supporting rod is installed inside the supporting seat.
Description
Technical Field
The invention discloses a support device for underground narrow roadway construction engineering, and belongs to the technical field of underground roadway construction.
Background
Roadways are various passages drilled between the earth's surface and the ore body for transporting ore, ventilation, drainage, pedestrians, and various necessary preparation works for newly digging ore for mining metallurgical equipment. The passages are called as tunnels, coal mines in China are mainly mined underground, a large number of tunnels need to be excavated underground, and tunnel support is adopted to keep the tunnels smooth and surrounding rocks stable, so that the method has important significance for coal mine construction and production. The basic purpose of supporting the roadway is to alleviate and reduce the movement of surrounding rocks, so that the section of the roadway is not excessively reduced, and meanwhile, the scattered and damaged surrounding rocks are prevented from falling off, in the general aspect, to prevent and treat the roof accidents of the roadway, the roadway is prevented from being arranged in a high stress area caused by mining or in a very soft and weak broken rock stratum when the roadway is excavated, the excavation working face is strictly forbidden to carry out open top operation, in soft coal, rock stratum or quicksand stratum and a geological broken zone, a forepoling support or other measures are required to be adopted, firm timbers or pull rods are required to be arranged among supports, when the roadway support is replaced, the support is reinforced before the original support is removed, after the original support is removed, top wall live waste rocks are removed in time, a permanent support is erected, and temporary support measures are required to be adopted if necessary.
However, most traditional supporting devices adopt an integrated welding structure, the self size can not be adjusted after installation, and when the supporting devices are used in narrow horizontal roadways in the pit, the supporting devices can not be used.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the underground narrow roadway construction engineering supporting device to solve the problems in the background art.
In order to achieve the purpose, the invention is realized by the following technical scheme: a supporting device for underground narrow roadway construction engineering comprises a supporting sleeve rod, a fixed bottom plate, a mechanism convenient to adjust and use and a fixed angle iron, wherein the fixed bottom plate is welded on the lower side of the supporting sleeve rod, the mechanism convenient to adjust and use is arranged on the lower side inside the supporting sleeve rod, the fixed angle iron is installed on the upper side of the right end face of the supporting sleeve rod, the mechanism convenient to adjust and use is arranged on the right side of the supporting sleeve rod, the mechanism convenient to adjust and use comprises a mine supporting net, a connecting plate, an extending sleeve plate, a reinforcing inclined rod, a supporting column, a positioning threaded rod, a reinforcing plate, a supporting seat and a longitudinal supporting rod, the supporting sleeve rod is clamped and sleeved on the lower side inside the supporting sleeve rod, the positioning threaded rod is inserted inside the supporting column, the reinforcing plates are symmetrically welded on the left side and the right side of the upper end face of the fixed bottom plate, the reinforcing inclined rod is installed on the upper end face of the supporting sleeve rod, and the extending sleeve plate is installed on the upper end face of the fixed angle iron, the extension sleeve plate is internally clamped and sleeved with a connecting plate, the upper end face of the support sleeve rod is welded with a mine support net, the front end face and the rear end face of the support sleeve rod are symmetrically welded with support seats, and longitudinal support rods are arranged in the support seats.
Further, it is two sets of to extend the lagging and install, and two sets of lagging specifications that extend are the same, and are two sets of extend the lagging inside spacing chamber of all having seted up, and spacing chamber and connecting plate phase-match.
Further, the support column welding has two sets ofly, and two sets of support column specifications are the same, and are two sets of positioning hole has all been seted up to the support column inside, the multiunit has been seted up to positioning hole, and multiunit positioning hole all with positioning threaded rod phase-match.
Furthermore, the right side of the lower end face of the extension sleeve plate is engaged with two groups of positioning bolts, and the specifications of the two groups of positioning bolts are the same.
Furthermore, four groups of supporting seats are welded on the supporting seats, the specifications of the four groups of supporting seats are the same, the four groups of supporting seats are of concave structures, and fixing bolts are meshed in the middle positions of the lower end faces of the supporting seats.
Further, the support loop bar is installed two sets ofly, and two sets of support loop bar specifications are the same, and is two sets of support loop bar is inside all to have seted up spacing chamber of going, and spacing chamber of going and support column phase-match.
Furthermore, the fixed angle iron and the reinforcing diagonal bar are both of detachable structures.
Furthermore, the reinforcing plate welding has the multiunit, and multiunit reinforcing plate is the triangle-shaped structure.
Furthermore, four groups of positioning threaded rods are inserted in the positioning threaded rods, the specifications of the four groups of positioning threaded rods are the same, and fixing nuts are meshed with the annular side faces of the four groups of positioning threaded rods.
The invention has the beneficial effects that: according to the support device for the underground narrow roadway construction engineering, the mine support net, the connecting plate, the extension sleeve plate, the reinforcing inclined rod, the support column, the positioning threaded rod, the reinforcing plate, the support seat and the longitudinal support rod are added, so that the support device is convenient to support in the narrow roadway, is convenient to adjust, use and disassemble, solves the problem that the original support device is not adjustable, so that the support device is inconvenient to assemble and use in the narrow roadway, and improves the convenient adjustment and use effect.
Because of extending the lagging and installing two sets ofly, and two sets of lagging specifications that extend are the same, two sets of inside spacing chambeies that have all seted up of extension lagging, and spacing chamber and connecting plate phase-match, this design makes things convenient for the connecting plate to carry out flexible adjustment in extension lagging, because of extending the meshing of lagging lower terminal surface right side has positioning bolt, positioning bolt meshing has two sets ofly, and two sets of positioning bolt specifications are the same, this design convenience is fixed a position the connecting plate, because of the gusset plate welding has the multiunit, and multiunit gusset plate is the triangle-shaped structure, multiunit gusset plate has improved the stability of being connected between PMKD and the support column, the invention is rational in infrastructure, possess height adjustable and control width adjustability, and convenient dismouting use, the practicality is strong.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a support device for construction engineering of an underground narrow roadway, according to the invention;
FIG. 2 is a front sectional view of a mechanism convenient to adjust and use in the support device for underground narrow roadway construction engineering of the invention;
FIG. 3 is a left sectional view of a mechanism convenient to adjust and use in the support device for construction engineering of an underground narrow roadway according to the invention;
in the figure: 1-supporting sleeve rod, 2-fixing bottom plate, 3-mechanism convenient to adjust and use, 4-fixing angle iron, 31-mine supporting net, 32-connecting plate, 33-extending sleeve plate, 34-reinforcing inclined rod, 35-supporting column, 36-positioning threaded rod, 37-reinforcing plate, 38-supporting seat, 39-longitudinal supporting rod, 331-positioning bolt, 351-positioning through hole and 381-fixing bolt.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a narrow tunnel construction engineering supporting device in pit, includes support loop bar 1, PMKD 2, is convenient for adjust use mechanism 3 and fixed angle bar 4, and the welding of 1 downside of support loop bar has PMKD 2, supports 1 inside downside of loop bar and is provided with and is convenient for adjust use mechanism 3, and fixed angle bar 4 is installed to 1 right-hand member face upside of support loop bar, and support 1 right side of loop bar is provided with and is convenient for adjust use mechanism 3.
The mechanism 3 convenient to adjust and use comprises a mine support net 31, a connecting plate 32, an extension sleeve plate 33, a reinforcing inclined rod 34, a supporting column 35, a positioning threaded rod 36, a reinforcing plate 37, a supporting seat 38 and a longitudinal supporting rod 39, the supporting column 35 is clamped and sleeved at the lower side inside the support sleeve rod 1, the positioning threaded rod 36 is inserted into the supporting column 35, the reinforcing plates 37 are symmetrically welded at the left side and the right side of the upper end face of the fixed bottom plate 2, the reinforcing inclined rod 34 is installed at the upper side of the right end face of the support sleeve rod 1, the extension sleeve plate 33 is installed at the upper end face of the fixed angle iron 4, the connecting plate 32 is clamped and sleeved inside the extension sleeve plate 33, the mine support net 31 is welded at the upper end face of the support sleeve rod 1, the supporting seat 38 is symmetrically welded at the front end face and the rear end face of the support sleeve rod 1, and the longitudinal supporting seat 39 is installed inside the supporting seat 38, this design has been solved original supporting device and has not possessed adjustable ability, leads to inconvenient problem of assembling the use in narrow tunnel.
As an embodiment of the present invention: extend the lagging 33 and install two sets ofly, and two sets of lagging 33 specifications that extend are the same, two sets of inside spacing chambeies of all having seted up of lagging 33 that extend, and spacing chamber and connecting plate 32 phase-match, this design makes things convenient for connecting plate 32 to stretch out and draw back the adjustment in that extends lagging 33 is inside, support column 35 welding has two sets ofly, and two sets of support column 35 specifications are the same, positioning hole 351 has all been seted up to two sets of support column 35 inside, positioning hole 351 has seted up the multiunit, and multiunit positioning hole 351 all with positioning threaded rod 36 phase-match, this design makes things convenient for positioning bolt 331 to fix a position support column 35, the terminal surface right side meshing has positioning bolt 331 under the lagging 33 that extends, positioning bolt 331 meshes has two sets ofly, and two sets of positioning bolt 331 specifications are the same, this design convenience is fixed a position connecting plate 32.
As an embodiment of the present invention: four groups of supporting seats 38 are welded, the specifications of the four groups of supporting seats 38 are the same, the four groups of supporting seats 38 are of concave structures, the middle position of the lower end face of each supporting seat 38 is meshed with a fixing bolt 381, the design is convenient to install and fix a longitudinal support rod 39, two groups of support sleeve rods 1 are installed, the specifications of the two groups of support sleeve rods 1 are the same, limit cavities are formed in the two groups of support sleeve rods 1 and are matched with support columns 35, the limit cavities facilitate lifting adjustment of the support columns 35 in the support sleeve rods 1, fixed angle iron 4 and reinforcing inclined rods 34 are of detachable structures, the design is convenient to detach and mount extension sleeve plates 33, a plurality of groups of reinforcing plates 37 are welded, the plurality of groups of reinforcing plates 37 are of triangular structures, the connecting stability between a fixed bottom plate 2 and the support columns 35 is improved by the plurality of groups of reinforcing plates 37, four groups of positioning threaded rods 36 are inserted, the specifications of the four groups of positioning threaded rods 36 are the same, the annular side surfaces of the four groups of positioning threaded rods 36 are respectively meshed with a fixing nut, the positioning threaded rods 36 are conveniently fixed through the design, and the situation that the positioning threaded rods 36 fall off in the use process is avoided.
As an embodiment of the present invention: firstly, a fixed bottom plate 2 is installed and fixed at an appointed position of the ground of an external underground roadway through an external expansion bolt, then a support sleeve rod 1 is clamped on the outer end face of a support column 35 and is fixed through a positioning threaded rod 36, then an extension sleeve plate 33 is installed and fixed through a fixed angle iron 4 and a reinforcing inclined rod 34, then a positioning bolt 331 is screwed by an external wrench, a connecting plate 32 is positioned, a longitudinal support rod 39 is installed and fixed inside a support seat 38 through a fixing bolt 381, further the support sleeve rod 1 between the front and the rear is spliced and fixed, then a mine support net 31 is cut to be required size and is welded and fixed on the upper end faces of the support sleeve rod 1, the extension sleeve plate 33 and the longitudinal support rod 39, when the height position of the support sleeve rod 1 needs to be adjusted, a fixing nut is loosened by the external wrench and the positioning threaded rod 36 is pulled out, then, the support sleeve rod 1 can be adjusted to move up and down, and after the adjustment is completed, the positioning threaded rod 36 is inserted into the corresponding positioning through hole 351 and the fixing nut is screwed down.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a narrow tunnel construction engineering supporting device in pit, includes support loop bar, PMKD, is convenient for adjust use mechanism and fixed angle bar, its characterized in that: a fixed bottom plate is welded on the lower side of the support sleeve rod, a mechanism convenient to adjust and use is arranged on the lower side in the support sleeve rod, a fixed angle iron is arranged on the upper side of the right end face of the support sleeve rod, and a mechanism convenient to adjust and use is arranged on the right side of the support sleeve rod;
the mechanism of being convenient for adjust and using includes that the mine props up protecting wire net, connecting plate, extension lagging, consolidates down tube, support column, positioning screw rod, gusset plate, supporting seat and vertical vaulting pole, the inside downside card cover of support lagging has the support column, the inside interlude of support column has positioning screw rod, the symmetrical welding of PMKD up end left and right sides has the gusset plate, support the right-hand member face upside of lagging and install the reinforcement down tube, fixed angle bar up end is installed and is extended the lagging, the inside card cover of extension lagging has the connecting plate, support the welding of lagging up end has the mine props up wire net, the symmetrical welding of terminal surface has the supporting seat around supporting the lagging, supporting seat internally mounted has vertical vaulting pole.
2. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the extension sleeve plate is provided with two sets of extension sleeve plates, the specifications of the two sets of extension sleeve plates are the same, and the extension sleeve plates are both provided with limiting cavities which are matched with the connecting plates.
3. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the support column welding has two sets ofly, and two sets of support column specifications are the same, and are two sets of positioning hole has all been seted up to the support column inside, the multiunit has been seted up to positioning hole, and multiunit positioning hole all with positioning threaded rod phase-match.
4. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the right side of the lower end face of the extension sleeve plate is engaged with two groups of positioning bolts, and the specifications of the two groups of positioning bolts are the same.
5. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the supporting seat is welded with four groups, the specifications of the four groups of supporting seats are the same, the four groups of supporting seats are of concave structures, and fixing bolts are meshed in the middle of the lower end face of each supporting seat.
6. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the support loop bar is installed two sets ofly, and two sets of support loop bar specifications are the same, and are two sets of support loop bar is inside all to have seted up spacing chamber of going, and spacing chamber of going and support column phase-match.
7. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the fixed angle iron and the reinforcing diagonal rod are of detachable structures.
8. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: the reinforcing plate welding has the multiunit, and multiunit reinforcing plate is the triangle-shaped structure.
9. The support device for the underground narrow roadway construction engineering according to claim 1, wherein: four groups of positioning threaded rods are inserted in the positioning threaded rods, the specifications of the four groups of positioning threaded rods are the same, and the annular side faces of the four groups of positioning threaded rods are all meshed with fixing nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822530.XA CN114060070A (en) | 2020-08-05 | 2020-08-05 | Supporting device for underground narrow tunnel construction engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822530.XA CN114060070A (en) | 2020-08-05 | 2020-08-05 | Supporting device for underground narrow tunnel construction engineering |
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| Publication Number | Publication Date |
|---|---|
| CN114060070A true CN114060070A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010822530.XA Pending CN114060070A (en) | 2020-08-05 | 2020-08-05 | Supporting device for underground narrow tunnel construction engineering |
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| CN (1) | CN114060070A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593341A (en) * | 2022-03-17 | 2022-06-07 | 江苏沙钢集团有限公司 | Steel band off tracking check out test set based on vision |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207795286U (en) * | 2018-01-29 | 2018-08-31 | 裴春敏 | A kind of temporary supporter for mine tunnel |
| CN209761464U (en) * | 2019-01-11 | 2019-12-10 | 王鹏 | Supporting safety protection device for underground mining |
| CN210317357U (en) * | 2019-08-13 | 2020-04-14 | 舒渊 | Mineral engineering tunnel supporting construction |
| CN210460706U (en) * | 2019-09-23 | 2020-05-05 | 张荣秋 | Underground roadway supporting device for coal mining |
| CN211008765U (en) * | 2019-11-21 | 2020-07-14 | 李永军 | Coal mine tunneling and supporting device |
| CN211008683U (en) * | 2019-11-23 | 2020-07-14 | 张勇 | Colliery tunnelling supporting device with regulatory function |
| CN211174151U (en) * | 2019-10-11 | 2020-08-04 | 袁秋根 | Temporary support bracket for coal mine tunnel |
-
2020
- 2020-08-05 CN CN202010822530.XA patent/CN114060070A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207795286U (en) * | 2018-01-29 | 2018-08-31 | 裴春敏 | A kind of temporary supporter for mine tunnel |
| CN209761464U (en) * | 2019-01-11 | 2019-12-10 | 王鹏 | Supporting safety protection device for underground mining |
| CN210317357U (en) * | 2019-08-13 | 2020-04-14 | 舒渊 | Mineral engineering tunnel supporting construction |
| CN210460706U (en) * | 2019-09-23 | 2020-05-05 | 张荣秋 | Underground roadway supporting device for coal mining |
| CN211174151U (en) * | 2019-10-11 | 2020-08-04 | 袁秋根 | Temporary support bracket for coal mine tunnel |
| CN211008765U (en) * | 2019-11-21 | 2020-07-14 | 李永军 | Coal mine tunneling and supporting device |
| CN211008683U (en) * | 2019-11-23 | 2020-07-14 | 张勇 | Colliery tunnelling supporting device with regulatory function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593341A (en) * | 2022-03-17 | 2022-06-07 | 江苏沙钢集团有限公司 | Steel band off tracking check out test set based on vision |
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Application publication date: 20220218 |