CN114060077B - Quick supporting device for coal mine tunnel fault - Google Patents
Quick supporting device for coal mine tunnel fault Download PDFInfo
- Publication number
- CN114060077B CN114060077B CN202111321240.8A CN202111321240A CN114060077B CN 114060077 B CN114060077 B CN 114060077B CN 202111321240 A CN202111321240 A CN 202111321240A CN 114060077 B CN114060077 B CN 114060077B
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- CN
- China
- Prior art keywords
- arc
- support
- truss
- supporting
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003245 coal Substances 0.000 title claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Abstract
The invention discloses a rapid supporting device for coal mine roadway fault crossing, which comprises a portal frame, wherein the portal frame is a frame with a certain length, a plurality of arc trusses are uniformly distributed and fixed above the portal frame along the length direction, a plurality of liftable supporting plates with uniform arc are connected to each arc truss through supporting and adjusting components, and the width of each supporting plate is smaller than the interval between the arc trusses; the leg of the portal frame is a telescopic support, and a support hydraulic cylinder is connected between the bottom end of the telescopic support and the portal frame; the bottom of the telescopic support column and the gantry frame are also connected with a fixing screw rod, and the fixing screw rod can fixedly connect the telescopic support column and the gantry frame through bolts. Compared with the prior art, the support guard plates can be expanded in rows, the stress area is large, the stress is uniform, the roadway surface can be bonded better, and the adjacent support guard plates and the expansion guard plates can be connected into continuous arcs to seal the top of the roadway.
Description
Technical Field
The invention relates to the technical field of coal mine supporting equipment, in particular to a rapid supporting device for coal mine roadway fault passing.
Background
The existing coal mine roadway supporting methods are all passive methods, such as a shed, a ram, timely spraying slurry and the like, have the adverse factors of unsafe operation, passive operation, time consumption, trouble, material consumption and the like, are also main root causes of life safety of workers in a tunneling working face, coal mine fault is a geological breaking belt with loss of continuity and integrity of rock mass, the rock is easy to collapse during tunneling, life health of constructors is endangered, the existing supporting device is poor in stability, height adjustment cannot be carried out according to requirements, installation is inconvenient, the supporting area of the existing supporting device is small, the supporting area cannot be enlarged according to requirements, and requirements cannot be met.
In the prior art, there is a supporting device capable of expanding the supporting area function, so that the supporting device can adapt to different types of roadways, but the existing supporting device with the expanding supporting area function can generate gaps when the area is changed, so that the supporting plate is stressed unevenly, the risk that broken stone of a coal stratum falls down exists, the supporting plate is in rigid contact with the coal stratum, the roadway surface which is completely and unevenly attached cannot be played, the supporting device cannot buffer in time when vibration occurs, and the structure can be damaged. In addition, the coal strata at the coal mine fault can have the phenomenon of uneven height, and the existing supporting device can not support in a stepped mode.
Therefore, it is necessary to provide a rapid supporting device for coal mine tunnel fault crossing so as to solve the problems in the background art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the rapid supporting device for the coal mine tunnel fault comprises a portal frame, wherein the portal frame is a frame with a certain length, a plurality of arc trusses are uniformly distributed above the portal frame along the length direction, a plurality of liftable supporting plates with uniform arc shapes are connected to each arc truss through supporting and adjusting components, and the width of each supporting plate is smaller than the interval between the arc trusses;
the leg of the portal frame is a telescopic support, and a support hydraulic cylinder is connected between the bottom end of the telescopic support and the portal frame;
the bottom of the telescopic support column and the gantry frame are also connected with a fixing screw rod, and the fixing screw rod can fixedly connect the telescopic support column and the gantry frame through bolts.
Further, preferably, the support adjustment assembly includes a support rail, a plurality of support rails extend along a radial direction of the arc truss and are uniformly distributed above the arc truss, a support rod is telescopically arranged in the support rail, a through groove is formed in one surface of the support rail, a raised sliding pin is fixed in one surface of the support rod, which is close to the through groove, and the sliding pin penetrates through the through groove of the support rail;
and a supporting base is fixed in one end of the supporting rod far away from the arc truss, and the upper part of the supporting base is connected with a supporting plate.
Further, preferably, an adjusting slide plate which is in arc fit with the arc truss is further arranged above the arc truss, and the adjusting slide plate and the supporting guide rail are staggered and positioned in the direction of the slide pin;
a plurality of arc-shaped sliding grooves extending outwards from the bottom are formed in the adjusting sliding plate, and each arc-shaped sliding groove is connected to a corresponding sliding pin in a penetrating mode, so that the sliding pin is limited in the arc-shaped sliding groove.
Further, as an optimization, the adjusting slide plate is connected with the arc truss through the fixed sliding sleeve, the fixed sliding sleeve is an inverted U-shaped clamp, two sides of the bottom end of the fixed sliding sleeve are fixedly connected with the arc truss, and the adjusting slide plate is limited in gaps on two sides of the fixed sliding sleeve.
Further, as an optimization, the adjusting slide plate is further connected with the arc truss through an adjusting hydraulic cylinder, the adjusting hydraulic cylinder is arranged at two ends of the arc truss, the tail end of a cylinder body of the adjusting hydraulic cylinder is hinged in the arc truss, and the tail end of a piston rod of the adjusting hydraulic cylinder is hinged in the adjusting slide plate.
Further, preferably, the center between the support base and the support plate is connected through a universal hinge support.
Further, preferably, expansion guard plates capable of extending and retracting along the cambered surfaces of the support guard plates are arranged in two sides of the support guard plates.
Further, as an optimization, one end of the expansion guard plate far away from the support guard plate is connected with the support guide rail through a hydraulic support rod respectively, and two ends of the hydraulic support rod are respectively and movably connected with the expansion guard plate and the support guide rail through universal joints.
Further, preferably, the adjusting slide plate is attached to the fixed sliding sleeve and the arc truss through a sliding gasket, and the sliding gasket is sleeved on the periphery of the adjusting slide plate and is fixed in the fixed sliding sleeve.
Further, preferably, a pulley is provided at the bottom of the telescopic strut.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the adjusting slide plate can be driven to rotate around the center of the arc truss along the upper arc edge of the arc truss through adjusting the expansion and contraction of the hydraulic cylinder, so that the position of the sliding pin in the arc chute is changed, and the supporting rod slides and expands in the supporting guide rail to change the lifting height of the supporting base, so that the supporting plate is attached to the top of a coal mine tunnel fault, coal strata with different heights in the fault can be adapted, the stress area is large, the stress is uniform, and collapse accidents caused by the fault are prevented.
According to the invention, the universal hinge support is used for enabling the support base and the support plate to meet the corner requirement in any direction and the radial and circumferential displacement requirement to a certain extent, so that the support plate can be attached to the roadway surface better and can transfer pressure better, the universal hinge support has the performances of resisting vertical tension and horizontal force, the structure is ensured not to fall off when the roadway vibrates, good damping performance is achieved, the support transfers force through a spherical surface, the necking phenomenon of force does not occur, and the counter force acting on the upper structure and the lower structure is relatively uniform. According to the invention, when the support rods push the support plates to rise, the hydraulic support rods push the expansion plates to extend along the cambered surfaces of the support plates by extension so as to fill gaps among a plurality of support plates distributed on the arc truss, so that the adjacent support plates and the expansion plates can be connected into continuous arcs to seal the top of a roadway.
Drawings
FIG. 1 is a schematic structural view of a rapid supporting device for coal mine tunnel fault;
FIG. 2 is a schematic diagram of a support adjustment assembly of a rapid support device for coal mine roadway fault;
FIG. 3 is a schematic diagram of a hydraulic support rod structure of a rapid supporting device for coal mine tunnel fault;
FIG. 4 is a schematic diagram of a fixed sliding sleeve structure of a rapid supporting device for coal mine tunnel fault;
in the figure: 1. a portal frame; 2. arc truss; 3. a support adjustment assembly; 4. a support plate; 41. expanding a guard board; 5. adjusting a hydraulic cylinder; 6. a telescopic strut; 7. a strut hydraulic cylinder; 8. a fixed screw; 9. a pulley; 31. supporting the guide rail; 32. a support rod; 33. a support base; 34. a slide pin; 35. adjusting the sliding plate; 36. an arc chute; 37. fixing the sliding sleeve; 371. a sliding pad; 38. a universal hinged support; 39. and a hydraulic support rod.
Detailed Description
Referring to fig. 1, in the embodiment of the invention, a rapid supporting device for a coal mine roadway crossing fault comprises a portal frame 1, wherein the portal frame 1 is a frame with a certain length, a plurality of arc trusses 2 are uniformly distributed and fixed above the portal frame along the length direction, a plurality of liftable supporting plates 4 with uniform arc shapes are connected to each arc truss 2 through a supporting and adjusting assembly 3, and the width of each supporting plate 4 is smaller than the interval between the arc trusses 2;
the leg part of the portal frame 1 is a telescopic support column 6, a support column hydraulic cylinder 7 is connected between the bottom end of the telescopic support column 6 and the portal frame 1, and the height position of the telescopic support column 6 can be adjusted by driving of the support column hydraulic cylinder 7;
the bottom of the telescopic support column 6 is also connected with a fixing screw rod 8 between the bottom of the telescopic support column 6 and the portal frame 1, and the fixing screw rod 8 can fixedly connect the telescopic support column 6 with the portal frame 1 through bolts.
Referring to fig. 2, in the present embodiment, the support adjustment assembly 3 includes a support rail 31, a plurality of support rails 31 are uniformly distributed above the arc truss 2 along the radial extension of the arc truss 2, support rods 32 are telescopically arranged in the support rail 31, a through slot is formed on one surface of the support rail 31, a raised sliding pin 34 is fixed in one surface of the support rod 32 close to the through slot, and the sliding pin 34 penetrates through the through slot of the support rail 31;
and, support base 33 is fixed with in the one end that the arc truss 2 was kept away from to support pole 32, support base 33 top is connected with support plate 4.
In this embodiment, an adjusting slide plate 35 attached to the arc truss 2 in an arc shape is further disposed above the arc truss 2, and the position of the adjusting slide plate 35 and the supporting guide rail 31 are staggered and located in the direction of the slide pin 34;
a plurality of arc-shaped sliding grooves 36 extending outwards from the bottom are formed in the adjusting sliding plate 35, and each arc-shaped sliding groove 36 is connected to the corresponding sliding pin 34 in a penetrating manner, so that the sliding pin 34 is limited in the arc-shaped sliding groove 36;
that is, when the adjustment slide 35 is rotated, the position of the slide pin 34 in the arc chute 36 is changed, so that the support bar 32 is slid and extended in the support rail 31 to change the elevation of the support base 33.
In this embodiment, the adjusting slide plate 35 is connected with the arc truss 2 through the fixing slide sleeve 37, the fixing slide sleeve 37 is an inverted "U" shaped fixture, two sides of the bottom end of the fixing slide sleeve are fixedly connected with the arc truss 2, the adjusting slide plate 35 is limited in the gaps at two sides of the fixing slide sleeve, and the adjusting slide plate 35 can slide along the upper arc edge of the arc truss 2.
In this embodiment, the adjusting slide plate 35 is further connected to the arc truss 2 through an adjusting hydraulic cylinder 5, the adjusting hydraulic cylinder 5 is disposed at two ends of the arc truss 2, the end of the cylinder body of the adjusting hydraulic cylinder 5 is hinged in the arc truss 2, and the end of the piston rod of the adjusting hydraulic cylinder 5 is hinged in the adjusting slide plate 35;
the adjusting slide plate 35 can be driven to rotate around the center of the arc truss 2 along the upper arc edge of the arc truss 2 through the extension and contraction of the adjusting hydraulic cylinder 5.
Referring to fig. 3, in this embodiment, the center between the support base 33 and the support plate 4 is connected by a universal hinge support 38;
the universal hinge support 38 is used for enabling the support base 33 and the support plate 4 to meet the corner requirements in any direction and the radial and annular displacement requirements to a certain extent, so that the support plate 4 can be attached to the roadway surface better and can transfer pressure better, the universal hinge support 38 has the performances of resisting vertical tension and horizontal force, the structure is not fallen off when the roadway vibrates, good damping performance is achieved, the support passes through the spherical force transmission, the necking phenomenon of force does not occur, and the counter force acting on the upper structure and the lower structure is relatively uniform.
In this embodiment, the two sides of the support plate 4 are provided with expansion guard plates 41 that can extend and retract along the cambered surface thereof.
In this embodiment, one end of the expansion guard plate 41 away from the support guard plate 4 is respectively connected with the support guide rail 31 through a hydraulic support rod 39, and two ends of the hydraulic support rod 39 are respectively movably connected with the expansion guard plate 41 and the support guide rail 31 through universal joints;
when the supporting rods 32 push the supporting plates 4 to rise, the hydraulic supporting rods 39 push the expanding protecting plates 41 to extend along the cambered surfaces of the supporting plates 4 by extension so as to fill gaps among the supporting plates 4 distributed on the arc truss 2, so that the adjacent supporting plates 4 and the expanding protecting plates 41 can be connected into continuous arcs to seal the top of a roadway, and vice versa;
and, the both ends of hydraulic support bar 39 pass through the universal joint respectively with extend backplate 41 and support guide rail 31 swing joint so that it can cooperate universal hinge support 38 and make extend backplate 41 along with support backplate 4 adaptation corner and radial, the displacement requirement of annular to a certain extent.
Referring to fig. 4, in this embodiment, the adjusting slide plate 35 is attached to the fixing slide sleeve 37 and the arc truss 2 through a sliding pad 371, and the sliding pad 371 is sleeved on the periphery of the adjusting slide plate 35 and is fixed in the fixing slide sleeve 37;
the sliding pad 371 is made of polytetrafluoroethylene material, which can generate self-lubricating material when the self-lubricating material rubs against the adjusting slide plate 35, so that friction force between the self-lubricating material and the adjusting slide plate is reduced, and noise and vibration are reduced.
In this embodiment, the bottom of the telescopic strut 6 is provided with a pulley 9, which is convenient for installation and position adjustment.
In the concrete implementation, as the support plate 4 of the arc truss 2 can be lifted, the support plate 4 is lowered to the lowest position in the initial state, the diameter of equipment is reduced, the telescopic support 6 is adjusted to the lowest position through the support hydraulic cylinder 7, and the equipment is sent to a coal mine tunnel fault;
the telescopic support column 6 is adjusted through the support column hydraulic cylinder 7, so that the arc center of the arc truss 2 is approximately at the height which is coincident with the arc center of the top of the roadway, and the corresponding support plate 4 is attached to the fault top of the coal mine roadway by respectively adjusting each support adjusting component 3, so that the telescopic support column can adapt to coal strata with different heights in the fault, collapse accidents caused by the fault are prevented, and the concrete adjusting mode is as follows:
the telescopic driving adjusting slide plate 35 of the adjusting hydraulic cylinder 5 rotates around the center of the arc truss 2 along the upper arc edge of the arc truss 2, and the position of the sliding pin 34 in the arc chute 36 is changed, so that the supporting rod 32 slides and stretches in the supporting guide rail 31 to change the lifting height of the supporting base 33;
the universal hinge support 38 is forced to rotate, so that the support base 33 and the support plate 4 can adapt to the corner requirement in any direction, and adapt to the radial and circumferential displacement requirement to a certain extent, and the support plate 4 can be attached to the roadway surface better;
moreover, when the supporting rods 32 push the supporting plates 4 to rise, the hydraulic supporting rods 39 push the expanding protecting plates 41 to extend along the cambered surfaces of the supporting plates 4 by extension so as to fill gaps among the supporting plates 4 distributed on the arc truss 2, so that the adjacent supporting plates 4 and the expanding protecting plates 41 can be connected into continuous arcs to seal the top of the roadway, and vice versa.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a colliery tunnel crosses quick strutting arrangement of fault, includes portal frame (1), its characterized in that, portal frame (1) is for having the frame of certain length, and its top is fixed with many arc trusses (2) along length direction evenly distributed, is connected with a plurality of liftable backplate (4) that arc is even on every arc truss (2) through supporting adjustment subassembly (3), just the width of backplate (4) is less than the interval of arc truss (2);
the leg of the portal frame (1) is a telescopic support (6), and a support hydraulic cylinder (7) is connected between the bottom end of the telescopic support (6) and the portal frame (1);
a fixed screw (8) is further connected between the bottom end of the telescopic support (6) and the portal frame (1), and the fixed screw (8) can fixedly connect the telescopic support (6) with the portal frame (1) through bolts;
the support adjusting assembly (3) comprises support guide rails (31), a plurality of support guide rails (31) extend along the radial direction of the arc-shaped truss (2) and are uniformly distributed above the arc-shaped truss (2), support rods (32) are telescopically arranged in the support guide rails (31), through grooves are formed in one surface of the support guide rails (31), protruding sliding pins (34) are fixed in one surface of the support rods (32) close to the through grooves, and the sliding pins (34) penetrate through the through grooves of the support guide rails (31);
a supporting base (33) is fixed in one end of the supporting rod (32) far away from the arc truss (2), and the upper part of the supporting base (33) is connected with a supporting plate (4);
an adjusting slide plate (35) which is in arc fit with the arc truss (2) is arranged above the arc truss, and the adjusting slide plate (35) is staggered with the supporting guide rail (31) in position and is positioned in the direction of the sliding pin (34);
a plurality of arc-shaped sliding grooves (36) extending outwards from the bottom are formed in the adjusting sliding plate (35), and each arc-shaped sliding groove (36) is connected to a corresponding sliding pin (34) in a penetrating manner, so that the sliding pin (34) is limited in the arc-shaped sliding groove (36);
the adjusting slide plate (35) is connected with the arc truss (2) through a fixed sliding sleeve (37), the fixed sliding sleeve (37) is an inverted U-shaped clamp, two sides of the bottom end of the fixed sliding sleeve are fixedly connected with the arc truss (2), and the adjusting slide plate (35) is limited in gaps at two sides of the fixed sliding sleeve;
expansion guard plates (41) which can extend and retract along the cambered surfaces of the support guard plates are arranged in the two sides of the support guard plates (4);
two extend backplate (41) one end of keeping away from backplate (4) respectively through a hydraulic support bar (39) with support guide rail (31) are connected, the both ends of hydraulic support bar (39) are respectively with extend backplate (41) and support guide rail (31) swing joint through the universal joint.
2. The rapid supporting device for coal mine roadway fault passing is characterized in that the adjusting sliding plate (35) is further connected with the arc-shaped truss (2) through an adjusting hydraulic cylinder (5), the adjusting hydraulic cylinder (5) is arranged at two ends of the arc-shaped truss (2), the tail end of a cylinder body of the adjusting hydraulic cylinder (5) is hinged in the arc-shaped truss (2), and the tail end of a piston rod of the adjusting hydraulic cylinder (5) is hinged in the adjusting sliding plate (35).
3. The rapid supporting device for coal mine tunnel fault passing according to claim 1, wherein the centers of the supporting base (33) and the supporting plate (4) are connected through universal hinge supports (38).
4. The rapid supporting device for coal mine tunnel fault passing is characterized in that the adjusting slide plate (35) is attached to the fixing slide sleeve (37) and the arc truss (2) through the sliding gasket (371), and the sliding gasket (371) is sleeved on the periphery of the adjusting slide plate (35) and is fixed in the fixing slide sleeve (37).
5. The rapid supporting device for coal mine tunnel fault passing according to claim 1, wherein the bottom of the telescopic support column (6) is provided with a pulley (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321240.8A CN114060077B (en) | 2021-11-09 | 2021-11-09 | Quick supporting device for coal mine tunnel fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321240.8A CN114060077B (en) | 2021-11-09 | 2021-11-09 | Quick supporting device for coal mine tunnel fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114060077A CN114060077A (en) | 2022-02-18 |
| CN114060077B true CN114060077B (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111321240.8A Active CN114060077B (en) | 2021-11-09 | 2021-11-09 | Quick supporting device for coal mine tunnel fault |
Country Status (1)
| Country | Link |
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| CN (1) | CN114060077B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718614B (en) * | 2022-04-02 | 2022-10-11 | 河南理工大学 | Supporting construction that coal mine tunnel tunneled |
| CN115288758B (en) * | 2022-07-01 | 2023-03-21 | 河南龙宇能源股份有限公司车集煤矿 | Gob entry dynamic pressure area prevents equipment of strutting of roof fall |
| CN116717290A (en) * | 2023-07-31 | 2023-09-08 | 窑街煤电集团有限公司 | Underground rock burst preventing device |
| CN116753008B (en) * | 2023-08-11 | 2023-10-27 | 北京科技大学 | Large-section roadway flexible supporting equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3621661A (en) * | 1968-11-05 | 1971-11-23 | Gullick Dobson Ltd | Mine roof supports |
| CN210370741U (en) * | 2019-05-22 | 2020-04-21 | 贵州大学 | Scalable tunnel support bow member |
| CN210564611U (en) * | 2019-10-16 | 2020-05-19 | 王生俊 | Temporary supporting structure for coal mine excavation |
| CN211648222U (en) * | 2020-03-13 | 2020-10-09 | 田红亮 | Supporting device for coal mine tunnel |
| CN212225290U (en) * | 2020-05-11 | 2020-12-25 | 欧阳志龙 | Coal mine tunneling and supporting device |
| CN112709587A (en) * | 2021-01-20 | 2021-04-27 | 马力 | Umbrella-shaped point column type temporary supporting structure of coal mine tunnel |
| CN213269933U (en) * | 2020-08-24 | 2021-05-25 | 张奇 | Underground coal mine roadway supporting device |
| CN213928385U (en) * | 2020-11-04 | 2021-08-10 | 项斌斌 | Underground coal mine support device |
| CN113236314A (en) * | 2021-06-22 | 2021-08-10 | 霍润阁 | Colliery tunnelling supporting device with regulatory function |
-
2021
- 2021-11-09 CN CN202111321240.8A patent/CN114060077B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3621661A (en) * | 1968-11-05 | 1971-11-23 | Gullick Dobson Ltd | Mine roof supports |
| CN210370741U (en) * | 2019-05-22 | 2020-04-21 | 贵州大学 | Scalable tunnel support bow member |
| CN210564611U (en) * | 2019-10-16 | 2020-05-19 | 王生俊 | Temporary supporting structure for coal mine excavation |
| CN211648222U (en) * | 2020-03-13 | 2020-10-09 | 田红亮 | Supporting device for coal mine tunnel |
| CN212225290U (en) * | 2020-05-11 | 2020-12-25 | 欧阳志龙 | Coal mine tunneling and supporting device |
| CN213269933U (en) * | 2020-08-24 | 2021-05-25 | 张奇 | Underground coal mine roadway supporting device |
| CN213928385U (en) * | 2020-11-04 | 2021-08-10 | 项斌斌 | Underground coal mine support device |
| CN112709587A (en) * | 2021-01-20 | 2021-04-27 | 马力 | Umbrella-shaped point column type temporary supporting structure of coal mine tunnel |
| CN113236314A (en) * | 2021-06-22 | 2021-08-10 | 霍润阁 | Colliery tunnelling supporting device with regulatory function |
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| Publication number | Publication date |
|---|---|
| CN114060077A (en) | 2022-02-18 |
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