CN113202532A - Rigid-flexible coupling supporting walking device - Google Patents
Rigid-flexible coupling supporting walking device Download PDFInfo
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- CN113202532A CN113202532A CN202110456557.6A CN202110456557A CN113202532A CN 113202532 A CN113202532 A CN 113202532A CN 202110456557 A CN202110456557 A CN 202110456557A CN 113202532 A CN113202532 A CN 113202532A
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- crossbeam
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- 230000008878 coupling Effects 0.000 title claims abstract description 12
- 238000010168 coupling process Methods 0.000 title claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 12
- 230000010354 integration Effects 0.000 abstract 1
- 230000005641 tunneling Effects 0.000 description 11
- 238000004873 anchoring Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0013—Frame type supports
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/08—Advancing mechanisms
- E21D23/081—Advancing mechanisms forming parts of the roof supports
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
Abstract
The invention discloses a rigid-flexible coupling supporting walking device which has the advantages of integration of flexible supporting and rigid supporting, high mechanization, high stability and the like; mainly comprises a cross beam, a longitudinal beam, a pushing hydraulic cylinder, an anti-falling baffle, a longitudinal beam supporting seat and a supporting hydraulic cylinder. The improved hydraulic support is characterized in that the two sides of the cross beam are connected with the anti-falling baffle through pins, the cross beam is provided with a boss, the longitudinal beam is provided with a connecting shaft connected with the cross beam, a spring is arranged on the connecting shaft, the side face of the cross beam is provided with a connector, the pushing hydraulic cylinder is hinged to the cross beam through the connector, the anti-falling baffle is provided with an anti-falling pin, the cross beam is provided with a longitudinal beam supporting seat, and the supporting hydraulic cylinder is connected with the cross beam through a pin shaft. The invention has the advantages of simple operation, high supporting efficiency, strong safety and the like.
Description
Technical Field
The invention relates to the technical field of coal mine underground roadway advance support, in particular to a rigid-flexible coupling support walking device for a fully mechanized excavation working surface.
Background
The temporary support technology of the excavation working face is one of key factors influencing the safety production of the excavation working face of a coal mine tunnel. The temporary support of the coal mine anchor net support excavation working face in China basically adopts a hanging ring penetrating forepoling bar support mode with very limited practical function and a small single hydraulic support mode. Although experts and scholars at home and abroad have long studied the temporary support technology of the heading face, no major breakthrough is made up to now.
When the working face of the underground coal mine roadway is tunneled, a cantilever type tunneling machine and a single anchor rod drilling machine are generally matched for use. During tunneling, "one digging and one anchoring" must be strictly executed to ensure the safe operation of the working face, which can cause the tunneling machine to frequently leave the working face and reduce the tunneling efficiency; moreover, when workers on the working face perform anchoring work, the jumbolter needs to be carried back and forth, so that the auxiliary operation time is long, the occupied personnel are more, the labor intensity of the workers is high, the anchoring efficiency is low, and the safety is lower; the 'hard support' type walking equipment is used for part of underground supports, secondary damage can be carried out on the top plate when the top plate is supported, stress change of the top plate is caused, and underground safe operation is affected.
The invention patent 'a unit type fore support with tail beam' (publication number: CN212563300U) discloses a unit type fore support with tail beam, which is characterized in that: a tail beam is hinged behind the top beam of the unit type forepoling, and the tail beam is connected with the top beam through a tail beam jack and a matched hydraulic system; the tail beam is of a box-type structure, and two groups of round holes are respectively hinged and fixed with the top beam and the jack; the tail boom jack is fixed by a shaft. The support bracket has simple structure and convenient operation; the expansion and contraction of the tail beam jack is controlled through the control valve, the tail beam of the fore support is extended and retracted, the aim of supporting the roadway roof in an auxiliary mode is achieved, the mechanization degree is high, but the fore support needs the heading machine to withdraw from the working face during working, then the roof is supported, and the heading efficiency is seriously affected.
The invention discloses a frame-type advance support bracket for a mining roadway (publication number: CN203962017U), which is characterized in that: the frame is composed of two groups of integral main frames and auxiliary frames which respectively move synchronously; the main frame comprises a main front cross beam and a main rear cross beam; the auxiliary frame comprises an auxiliary front cross beam and an auxiliary rear cross beam; the main front cross beam of the main frame and the auxiliary rear cross beam of the auxiliary frame are hinged with each other by using a frame moving hydraulic cylinder, and the main frame or the auxiliary frame is driven by the frame moving hydraulic cylinder to realize integral synchronous movement. The support has compact structure, small occupied roadway space and simple and convenient operation, has good bearing capacity on the static load of the top plate, but has no good effect on the dynamic load treatment. Because of the strong mining stress in the well, if the well is not well treated by the dynamic load, the safety operation in the well is seriously influenced.
The invention patent 'a slip type flexible advance support mechanism' (publication number: CN211008705U) is characterized in that: the walking support device comprises a flexible support assembly and a walking support assembly, wherein the flexible support assembly is arranged above the walking support assembly; the flexible supporting assembly comprises a main supporting longitudinal beam assembly and an auxiliary supporting longitudinal beam assembly, and the main supporting longitudinal beam assembly and the auxiliary supporting longitudinal beam assembly are arranged in parallel; the walking support assembly comprises a main support beam assembly and an auxiliary support beam assembly, and the main support beam assembly and the auxiliary support beam assembly are overlapped and arranged in a lap joint mode. Adaptation unevenness's roof that can be better, the flexible support subassembly can fully laminate with unevenness's roof in the mechanism, avoids appearing the uneven condition of roof atress, effectively protects the roof not receive destruction. However, the support of the support for the top plate is insufficient, and the top plate can move downwards to a certain extent, so that the underground operation is unsafe.
The invention discloses a walking type anchor supporting robot for a fully-mechanized working face (publication number: CN212563280U), which comprises a supporting net system, an anchoring system, a ground supporting system and a power and turning system. The method is characterized in that: the bracing system is arranged above the ground bracing system; the anchoring system is arranged below the main beam and the middle main beam in the net supporting system through screws; the ground support system is arranged below the main beam and the middle main beam in the stay network system and provides support for the whole equipment; and two ends of the power and turning system are respectively connected with the main beam and the middle main beam in the net supporting system in a pin connection mode. The walking device has the advantages of small volume, compact structure, walking, stable operation, flexible turning and good maneuverability. However, the support is hard support, namely the fluctuating load transmitted by the top plate cannot be well filtered, and the top plate is unstable.
In order to solve the problems, a rigid-flexible coupling supporting walking device is designed. The support realizes the functions of rigid-flexible coupling supporting and walking, and has the advantages of simple structure, convenience in operation, high supporting efficiency, high safety and the like.
Disclosure of Invention
The invention aims to provide a rigid-flexible coupling supporting walking device to solve the problems in the background.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a walking device is striden to rigid-flexible coupling strut, includes crossbeam, longeron, passes the pneumatic cylinder, prevents down baffle, longeron supporting seat, supports its characterized in that of pneumatic cylinder: the improved hydraulic support is characterized in that the two sides of the cross beam are connected with the anti-falling baffle through pins, the cross beam is provided with a boss, the longitudinal beam is provided with a connecting shaft connected with the cross beam, a spring is arranged on the connecting shaft, the side face of the cross beam is provided with a connector, the pushing hydraulic cylinder is hinged to the cross beam through the connector, the anti-falling baffle is provided with an anti-falling pin, the cross beam is provided with a longitudinal beam supporting seat, and the main supporting hydraulic cylinder is connected with the cross beam through a pin shaft.
Preferably, longeron supporting seat, boss are installed to the crossbeam intermittent type, longeron supporting seat cooperation boss, spring support the longeron, be equipped with the connecting axle on the longeron, the connecting axle passes the inside hole of crossbeam and connects.
Preferably, the pushing hydraulic cylinder consists of a pushing piston rod, a piston head and a connector, and the beam is driven to advance by the expansion of the piston pushing piston rod.
Preferably, the anti-falling baffle is connected with the cross beam through a pin, the upper part of the anti-falling baffle is matched with the cross beam, and the anti-falling pin is arranged below the anti-falling baffle.
Preferably, the bottom of the supporting hydraulic cylinder is provided with a base.
Preferably, a spring is mounted in the boss.
Preferably, the pushing hydraulic cylinder has two, the crossbeam, longeron respectively have four, support hydraulic cylinder, longeron supporting seat, boss, prevent down baffle, spring respectively have eight, prevent down the round pin and have sixteen.
Compared with the prior art, the invention has the beneficial effects that:
1. the device adopts a spring and a longitudinal beam supporting seat to carry out combined support, and a flexible spring is arranged between a cross beam and a longitudinal beam on the support; when the support is in a primary support state, the support is mainly supported by the spring, and when the supporting force of the spring is not enough to support the top plate, the longitudinal beam support seat and the spring support the top plate in a combined manner, so that the combined support effectively avoids 'hard support' of an underground tunneling working surface, effectively reduces the dynamic load of a coal mine tunnel, and realizes rigid-flexible coupling support of the tunnel.
2. The support process of the advance support is highly automated, the complexity of manual operation is effectively reduced, the labor intensity of underground workers is reduced, the support equipment is prevented from moving back and forth, the advance support has the advantages of being simple in structure and convenient to operate, and the underground tunneling speed is greatly improved.
Drawings
FIG. 1 is a schematic view of a rigid-flexible coupling stent according to the present invention;
FIG. 2 is a schematic view of a cross beam structure according to the present invention;
FIG. 3 is a schematic view of the longitudinal and transverse beams of the present invention;
FIG. 4 is a schematic view of a pushing cylinder of the present invention;
FIG. 5 is a schematic view of the anti-backup baffle of the present invention;
FIG. 6 is a schematic view of a longitudinal beam support base according to the present invention;
in the figure: 1-cross beam 101-boss 102-spring 103-pin shaft 104-base 2-longitudinal beam 201-connecting shaft 3-pushing hydraulic cylinder 301-pushing piston rod 302-piston head 303-connecting head 4-anti-falling baffle 401-pin 402-anti-falling pin 5-longitudinal beam supporting seat 6-pushing hydraulic cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, a technical solution provided by the present invention is: including crossbeam, longeron, lapse pneumatic cylinder, prevent down baffle, longeron supporting seat, support pneumatic cylinder, its characterized in that: the improved hydraulic support is characterized in that the two sides of the cross beam are connected with the anti-falling baffle through pins, the cross beam is provided with a boss, the longitudinal beam is provided with a connecting shaft connected with the cross beam, a spring is arranged on the connecting shaft, the side face of the cross beam is provided with a connector, the pushing hydraulic cylinder is hinged to the cross beam through the connector, the anti-falling baffle is provided with an anti-falling pin, the cross beam is provided with a longitudinal beam supporting seat, and the main supporting hydraulic cylinder is connected with the cross beam through a pin shaft. The longitudinal beam supporting seat and the boss are mounted on the cross beam, the longitudinal beam supporting seat is matched with the boss and the spring to support the longitudinal beam, the longitudinal beam is provided with a connecting shaft, and the connecting shaft penetrates through an inner hole of the cross beam to be connected. The pushing hydraulic cylinder consists of a pushing piston rod, a piston head and a connector, and the beam is driven to advance by the expansion of the piston rod. Prevent down the baffle and be connected with the crossbeam through the pin, prevent down the baffle top and cooperate with the crossbeam, prevent down the baffle below and install and prevent down the round pin. And a base is arranged at the bottom of the supporting hydraulic cylinder. And springs are arranged inside the bosses and on the connecting shafts. The pushing hydraulic cylinder is provided with two transverse beams and four longitudinal beams, the supporting hydraulic cylinder, the longitudinal beam supporting seat, the boss, the anti-falling baffle and the spring are eight, and the anti-falling pin is sixteen.
The working principle is as follows: when the rigid-flexible coupling supporting stepping walking device reaches a tunneling working face, the supporting hydraulic cylinder (6) jacks up the support cross beam (1), when the supporting hydraulic cylinder (6) rises until the longitudinal beam (2) is in contact with the top plate, the top plate is stressed by the support, the spring (102) installed inside the boss (101) is compressed properly to form a primary supporting state, and the deformation degree of the spring (102) can be adjusted due to the fact that the longitudinal beam (2) is not flat, so that the shape of the top plate is adapted. When the heading machine starts to work, the support supporting force of the support is gradually increased, when the supporting force of the spring (102) is not enough to support the top plate, the longitudinal beam (2) is in contact with a longitudinal beam supporting seat (5) arranged on the cross beam (1), and the support generates the maximum supporting force to support the heading face in advance to the maximum extent. When the tunneling working face reaches a certain empty-top distance, the tunneling machine needs to move forwards, the forepoling needs to enter a new working face in advance, the support needs to advance, the supporting hydraulic cylinders (6) of the odd-numbered cross beams (1) shrink away from the bottom plate, a group of pushing hydraulic cylinders (3) connected with the middle of the two middle cross beams (1) of the support push the odd-numbered cross beams (1) forwards, the longitudinal beams (2) slide on the top plate anchor net, and after the certain empty-top distance is reached, the odd-numbered group of supporting hydraulic cylinders (6) extend to support the top plate. At the moment, the even-numbered groups of the supporting hydraulic cylinders (6) are contracted away from the top plate, the pushing hydraulic cylinders (6) between the cross beams (1) are extended to drive the even-numbered groups of the cross beams (1) to move, when a certain step pitch is reached, the even-numbered groups of the supporting hydraulic cylinders (6) are extended to reciprocate, when a new tunneling working face is reached, the two groups of the supporting hydraulic cylinders (6) are simultaneously jacked to support the top plate, the tunneling machine starts to work on the new working face, and the forepoling support continues to support the top plate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a walking device is striden to rigid-flexible coupling strut, includes crossbeam (1), longeron (2), passes pneumatic cylinder (3), prevents down baffle (4), longeron supporting seat (5), supports pneumatic cylinder (6) its characterized in that: crossbeam (1) both sides are connected through pin (401) and anti-falling baffle (4), crossbeam (1) is provided with boss (101), be equipped with connecting axle (201) on longeron (2) and be connected with the crossbeam, spring (102) are equipped with on connecting axle (201), crossbeam (1) side is equipped with connector (303), pass pneumatic cylinder (3) and articulate through connector (303) and crossbeam (1), prevent falling down and be equipped with on the baffle (4) and prevent falling down round pin (402), install longeron supporting seat (5) on crossbeam (1), support hydraulic cylinder (6) are connected with crossbeam (1) through round pin axle (103).
2. A rigid-flexible coupled supporting walking device according to claim 1, wherein: install longeron supporting seat (5), boss (101) on crossbeam (1), longeron supporting seat (5) cooperation boss (101), spring (102) support longeron (2), be equipped with connecting axle (201) on longeron (2), connecting axle (201) pass crossbeam (1) inside hole and connect.
3. A rigid-flexible coupled supporting walking device according to claim 1, wherein: the pushing hydraulic cylinder (3) is composed of a pushing piston rod (301), a piston head (302) and a connector (303), and the pushing piston rod (301) stretches to drive the beam (1) to advance.
4. A rigid-flexible coupled supporting walking device according to claim 1, wherein: prevent down baffle (4) and be connected with crossbeam (1) through pin (401), prevent down baffle (4) below and install and prevent down pin (402).
5. A rigid-flexible coupled supporting walking device according to claim 1, wherein: and a base (104) is arranged at the bottom of the supporting hydraulic cylinder (6).
6. A rigid-flexible coupled supporting walking device according to claim 1, wherein: and a spring (102) is arranged in the boss (101).
7. A rigid-flexible coupled supporting walking device according to claim 1, wherein: the pushing hydraulic cylinder (3) is provided with two transverse beams (1) and four longitudinal beams (2), the supporting hydraulic cylinder (6), the longitudinal beam supporting seat (5), the boss (101), the anti-falling baffle plate (4) and the spring (102) are eight in number, and the anti-falling pin (402) is sixteen in number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110456557.6A CN113202532A (en) | 2021-04-27 | 2021-04-27 | Rigid-flexible coupling supporting walking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110456557.6A CN113202532A (en) | 2021-04-27 | 2021-04-27 | Rigid-flexible coupling supporting walking device |
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| Publication Number | Publication Date |
|---|---|
| CN113202532A true CN113202532A (en) | 2021-08-03 |
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| CN202110456557.6A Pending CN113202532A (en) | 2021-04-27 | 2021-04-27 | Rigid-flexible coupling supporting walking device |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2044333A (en) * | 1979-01-12 | 1980-10-15 | Salzgitter Maschinen Ag | Temporary Tunnel Support for Holing Operations in Tunnels of Underground Mines |
| CN102031985A (en) * | 2009-09-28 | 2011-04-27 | 三一重型装备有限公司 | Walking support |
| CN102128040A (en) * | 2011-01-18 | 2011-07-20 | 阜新工大科技发展有限公司 | Hydraulic striding-type advanced-support equipment |
| CN201953390U (en) * | 2011-01-18 | 2011-08-31 | 阜新工大科技发展有限公司 | Hydraulic walking advance support equipment |
| CN202467883U (en) * | 2012-01-20 | 2012-10-03 | 北京宇田世纪矿山设备有限公司 | Light-duty hydraulic support for bistable reverse four-link mechanism |
| CN203008944U (en) * | 2013-01-09 | 2013-06-19 | 山东立业机械装备有限公司 | Comprehensive fore support for excavation head |
| CN203362198U (en) * | 2013-07-05 | 2013-12-25 | 山西潞安环保能源开发股份有限公司 | Track walking type immediate support device of fully-mechanized drivage roadway |
| CN206448833U (en) * | 2017-01-04 | 2017-08-29 | 上海创力集团股份有限公司 | A kind of stepping self-moving type bracket |
| CN207526516U (en) * | 2017-08-21 | 2018-06-22 | 大同煤矿集团有限责任公司 | A kind of removable alley hydraulic support |
| CN108442960A (en) * | 2018-05-02 | 2018-08-24 | 河南焦煤能源有限公司古汉山矿 | A kind of constant pressure automatic moving type forepoling hydraulic support |
| CN110645034A (en) * | 2019-10-29 | 2020-01-03 | 辽宁工程技术大学 | Sliding type flexible advance support mechanism and method |
| CN112096436A (en) * | 2020-10-10 | 2020-12-18 | 中国矿业大学 | Tunneling working face circulating support combined support |
-
2021
- 2021-04-27 CN CN202110456557.6A patent/CN113202532A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2044333A (en) * | 1979-01-12 | 1980-10-15 | Salzgitter Maschinen Ag | Temporary Tunnel Support for Holing Operations in Tunnels of Underground Mines |
| CN102031985A (en) * | 2009-09-28 | 2011-04-27 | 三一重型装备有限公司 | Walking support |
| CN102128040A (en) * | 2011-01-18 | 2011-07-20 | 阜新工大科技发展有限公司 | Hydraulic striding-type advanced-support equipment |
| CN201953390U (en) * | 2011-01-18 | 2011-08-31 | 阜新工大科技发展有限公司 | Hydraulic walking advance support equipment |
| CN202467883U (en) * | 2012-01-20 | 2012-10-03 | 北京宇田世纪矿山设备有限公司 | Light-duty hydraulic support for bistable reverse four-link mechanism |
| CN203008944U (en) * | 2013-01-09 | 2013-06-19 | 山东立业机械装备有限公司 | Comprehensive fore support for excavation head |
| CN203362198U (en) * | 2013-07-05 | 2013-12-25 | 山西潞安环保能源开发股份有限公司 | Track walking type immediate support device of fully-mechanized drivage roadway |
| CN206448833U (en) * | 2017-01-04 | 2017-08-29 | 上海创力集团股份有限公司 | A kind of stepping self-moving type bracket |
| CN207526516U (en) * | 2017-08-21 | 2018-06-22 | 大同煤矿集团有限责任公司 | A kind of removable alley hydraulic support |
| CN108442960A (en) * | 2018-05-02 | 2018-08-24 | 河南焦煤能源有限公司古汉山矿 | A kind of constant pressure automatic moving type forepoling hydraulic support |
| CN110645034A (en) * | 2019-10-29 | 2020-01-03 | 辽宁工程技术大学 | Sliding type flexible advance support mechanism and method |
| CN112096436A (en) * | 2020-10-10 | 2020-12-18 | 中国矿业大学 | Tunneling working face circulating support combined support |
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Application publication date: 20210803 |