CN106677813A - Novel temporary supporting device for coal mine roadway comprehensive digging face - Google Patents

Novel temporary supporting device for coal mine roadway comprehensive digging face Download PDF

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Publication number
CN106677813A
CN106677813A CN201611264544.4A CN201611264544A CN106677813A CN 106677813 A CN106677813 A CN 106677813A CN 201611264544 A CN201611264544 A CN 201611264544A CN 106677813 A CN106677813 A CN 106677813A
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CN
China
Prior art keywords
supporting
base
supporting mechanism
coal mine
oil cylinder
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.)
Pending
Application number
CN201611264544.4A
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Chinese (zh)
Inventor
郭文孝
李刚
闫殿华
宋涛
周凯
李莉
杨晓明
王晓蜂
赵建武
王�琦
张银星
朱天龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
Original Assignee
Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Filing date
Publication date
Application filed by Taiyuan Institute of China Coal Technology and Engineering Group, Shanxi Tiandi Coal Mining Machinery Co Ltd filed Critical Taiyuan Institute of China Coal Technology and Engineering Group
Priority to CN201611264544.4A priority Critical patent/CN106677813A/en
Publication of CN106677813A publication Critical patent/CN106677813A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0445Extensions of the base member supporting the conveyor
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices

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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)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention relates to the technical field of coal mine down-hole comprehensive digging face temporary supporting, in particular to a novel temporary supporting device for a coal mine roadway comprehensive digging face. The novel temporary supporting device comprises a left supporting mechanism, a right supporting mechanism, a front supporting leg, a rear supporting leg, a front beam and a telescopic beam. The left supporting mechanism and the right supporting mechanism are integrally connected with a pin shaft through connecting transverse beams, the front beam and a protecting head on beam, and the structure of the left supporting mechanism is the same with that of the right supporting mechanism, and the left supporting mechanism and the right supporting mechanism comprise a base, a guiding beam, vertical pillars and top beams. The vertical pillars are fixed to the base, the top beams are arranged at the tops of the vertical pillars, and a sliding rail is arranged in the base. The front supporting leg and the rear supporting leg are integrally connected through the sliding rail. A supporting top longitudinal beam is arranged on the connecting transverse beams, the connecting transverse beams are fixed to the top beams, and the supporting top longitudinal beam is connected with the telescopic beam through a telescopic oil cylinder. The telescopic beam and the front beam are connected through a front beam jack, the front beam and the protecting head on beam are integrally connected through a protecting head on beam jack, and a pushing oil cylinder is arranged between the base and the front supporting leg. According to the novel temporary supporting device for the coal mine roadway comprehensive digging face, the supporting procedures are simplified.

Description

New Coal Mine tunnel Zong Jue faces temporary support device
Technical field
The present invention relates to the technical field of the comprehensive pick face gib of underground coal mine, specifically a kind of new colliery Zong Jue faces The temporary support device in tunnel.
Background technology
Before the development of speedy drivage temporary shoring bracket, what most domestic underground coal mine driving face was commonly used faces When supporting have:One is hanging ring tube-through type forestope gib;Two is vehicle-mounted temporary support device for development machine;Three is using many Row's hydraulic prop increases intensity I-steel capplce method of support etc..Although these modes alleviate heading driver to a certain extent Met head on as face the pressure of supporting, improve the supporting situation of working face, but also there are many deficiencies in actual use Place, is still present larger hidden danger in safety.The safety problem of temporary support for drivage face is that long-standing problem colliery is quickly dug Enter safety in production technical barrier for many years, because top board can not in time obtain effective supporting after tunnelling, often cause Top board falls cash casualty accident, it is impossible to give full play to the efficiency of high-performance development machine.
(1)Hanging ring tube-through type forestope gib
Hanging ring wears formula forestope gib, is mainly made up of hanging ring and forestope, and ring is fixed on top board by anchor pole, preceding Beam is visited in suspension ring, rear supporting roof is leant out, its subject matter:1. steel and top board are stopped into the real back of the body tightly using half round timber and timber wedge, There is no setting load, there is great potential safety hazard;2. forestope and top board are point or linear contact lay, it is impossible to which empty top zone is carried out comprehensively Effective support, as run into roof cracking using effect if it is worse;3. operating process complexity is, it is necessary to artificial mobile, and labour intensity is big, Gib speed is slow, efficiency is low;4. bolting with wire mesh mode operator in lapping has to enter into empty top zone operation, exists greatly Potential safety hazard.
(2)Vehicle-mounted temporary support device for development machine
Device is mainly made up of left and right base, left and right frame, left and right rollover stand, left and right folding arm frame and upper frame beam, installed in driving Machine front middle part.When development machine is normally tunneled, the folding device is contracted in cut reductor back, do not disturb development machine motion and Cut operation function;By the position for operating the hydraulic control valve of supporting folding stand to control folding stand when needing supporting, make folding Superimposed is stretched out and is supported in top board, completes branch protective function.Its major defect:1. supporting area is small, it is impossible to the complete exposed top of supporting Plate;, there is great potential safety hazard in 2. operating personnel's still operation under sky top during bolting with wire mesh;3. the device is adapted to top board Property is poor.Roof and floor fluctuating is run into during driving, tunnel step-down, airborne supporting can not put to good use open completely, not reach setting load, deposit In larger potential safety hazard.
(3)Multiple rows of hydraulic prop increases intensity I-steel capplce method of support
It is first rapid after machine pick to use hydraulic single prop by empty top zone firm supporting, then tapped again, treat Chu Liwan After falling cash living, float stone, rapidly with monomer column by I-steel and steel wire top to top straight portion, network, protect top board.Install At least three people coordinate during every hydraulic prop carries out gib, and labor strength is big, high cost, and prop drawing is dangerous Greatly, there is potential safety hazard, and influence personnel and equipment to pass through, supporting effect and safety guarantee are undesirable.
The content of the invention
The present invention is in order to solve the above mentioned problem that existing underground coal mine gib is present, there is provided a kind of new colliery The temporary support device in comprehensive pick face tunnel.
The present invention takes following technical scheme:A kind of temporary support device in new colliery Zong Juemian tunnels, including a left side Supporting mechanism, right supporting mechanism, front support leg, rear support leg, front-axle beam and extensible canopy, left supporting mechanism and right supporting mechanism pass through Connecting cross beam, front-axle beam, shield meet head on beam and bearing pin is connected as a single entity, and described left supporting mechanism is identical with right supporting mechanism structure, bag Base, guide beam, column and back timber are included, column is fixed with base, column top is provided with back timber, slide rail is provided with base, preceding Supporting leg and rear support leg are connected as one by slide rail, and support longeron is arranged on connecting cross beam, and connecting cross beam is fixed on top Liang Shang, support longeron is connected with extensible canopy by telescopic oil cylinder, and extensible canopy is connected with front-axle beam by front-axle beam jack, front-axle beam with shield Beam of meeting head on is connected as a single entity by shield beam jack of meeting head on, and passage oil cylinder is respectively disposed between base and front support leg.Front support Leg and rear support leg, connect as one to form lift bottom and take a step walking mechanism by slide rail, passage oil cylinder and base.
Described extensible canopy forms telescoping mechanism, stroke and the tunnel of telescopic oil cylinder with support longeron by telescopic oil cylinder Anchor pole array pitch is consistent, is capable of achieving the gib of the super previous array pitch in comprehensive pick face tunnel.
The front end of described front-axle beam is respectively provided with steel band groove with middle part, and the steel band groove of front end can stretch receipts by front-axle beam jack Realize that steel band is laid with the mechanization of piece net.
Also include auxiliary support mechanism, described auxiliary support mechanism is connected as a single entity by bearing pin with rear support leg, when auxiliary After helping supporting mechanism support, a strong point for stabilization can be provided for temporary support device.
Described base is provided with engaging lug, can connect tuningout oil cylinder by bearing pin, and comprehensive pick face temporary support device is entered Row tuningout;Also mutual side board can be connected, prevents the coal cinder of tunnel wall caving from falling into inside comprehensive pick face temporary support device.
Described passage oil cylinder is arranged in the inside of base, simple and compact for structure.
The present invention is straddled on development machine, and when development machine is tunneled forward, temporary support device need to first withdraw shield and meet head on Beam, is moved forward followed by development machine, and immediate support is carried out to top board.When temporary support device moves forward, support before and after receiving first The oil cylinder of leg makes its liftoff, and stretching passage oil cylinder moves forward the lift bottom slideway of base before walking mechanism of taking a step, and receiving column makes support Top longeron departs from top board, and stretching the oil cylinder of front and rear supporting leg makes its support ground and lift base, and the oil cylinder for stretching auxiliary support mechanism makes Its roof supporting, receiving passage oil cylinder makes left and right supporting mechanism be moved forward along slide rail, and the oil cylinder of supporting leg makes base before and after receiving Ground connection, stretching column makes support longeron roof supporting;Development machine tunnels a row further along, and receiving column makes support longeron depart from top board, Stretching out telescopic oil cylinder makes one array pitch of front-axle beam advance support, and stretching column makes support longeron roof supporting.Before receipts front-axle beam jack makes The beam bottom, puts anchor net and steel band, and stretching front-axle beam jack makes front-axle beam connect top.Stretch shield to meet head on beam jack, its supporting is met head on, prevent The piece coal met head on drops.
It is of the invention to change traditional support pattern, easily realize tunneling boring active roof supporting in time, be conducive to the top of mine Plate safety management.
(1)Lift bottom is taken a step walking mechanism, is connected with supporting mechanism by passage oil cylinder and is realized the advanced in years of temporary support device Step formula is moved certainly.
(2)Auxiliary support mechanism, when supporting mechanism moves forward, can provide a strong point for stabilization for it, it is ensured that Temporary support device is stable to take a step forward.
(3)Extensible canopy forms telescoping mechanism with support longeron by telescopic oil cylinder, realizes the advance support in tunnel, and can be real Now tunnel two rows and move a temporary support device, simplify gib operation, reduce and move sortie number.
(4)Two steel band grooves are disposed with front-axle beam, the laying anchor net and upper steel band of mechanization is capable of achieving, work is reduced strong Degree, it is ensured that the safety of personnel.
(5)Temporary support device front end is provided with shield and meets head on beam, when manually permanent support is carried out to top board, can prevent from meeting head on Piece coal drops, it is ensured that personal security.
(6)Supporting mechanism uses sliding track mechanism, it is ensured that support vertical and horizontal stability, bears and transmit outer load, protects Hold the integral rigidity of support.And base has larger contact area, a reliable strong point can be formed and improve support Stability.
(7)Freestanding hydraulic system, hydraulic system easy to connect safety, people high to driving face scene adaptability Member is short in the danger zone set-up time, greatly improves personnel safety.
(8)Large span body supports mechanism, realizes and comprehensive pick equipment Rational Matching.With development machine independently working, do not do mutually Relate to, dependable performance, move frame it is convenient and reliable rapidly.Realize the driving --- rank of the permanent supporting of non-support --- gib --- Take over and cross, be capable of achieving the operating type of continuous driving and continuous supporting.
The present invention has following beneficial effect:The tunneling boring active roof supporting to top board is capable of achieving, simplifies supporting journey Sequence, realizes the mode of working continuously that driving, gib and permanent Anchor Care are synchronously carried out, it is to avoid operating personnel makees under sky top The potential safety hazard of industry, is conducive to the Safety Control of Roof of colliery headwork, is that comprehensive pick face creates safe working environment;Carry Working in driving face of coal mine mechanization supporting work degree high, greatly improves driving speed and operating efficiency, reduces excavation cost and work The labour intensity of industry personnel, alleviate digging continue anxiety passive situation.
The present invention creates reliable, flexible supporting condition for driving face safety and high efficiency, to improving development end Mechanical mining technique, improves driving speed and production efficiency is significant.
Brief description of the drawings
Fig. 1 is schematic front view of the invention;
Fig. 2 is schematic top plan view of the invention;
Fig. 3 is schematic side view of the invention;
In figure:1. inner support group, 2. support arm group, 3. support arm group outrigger, 4. outrigger group support beam, 5. support arm group Back timber, 6. inner support group support beam, 7. inner support group back timber, 8. column, 9. base, 10. front rod, 11. caving shields, 12. Back link, 13. inner support group outriggers, 14. passage oil cylinders, 15. outrigger jack.
Specific embodiment
Specific embodiment of the invention is described further with reference to accompanying drawing.
New Coal Mine tunnel Zong Jue faces temporary support device is reasonably supporting with development machine, to the intimate nothing of back repeatedly Support, can in time realize tunneling boring supporting, simplify supporting program, realize driving, gib and the same stepping of permanent Anchor Care Capable mode of working continuously, it is to avoid operating personnel improves mechanization supporting work degree in the operation of empty top zone domain, reduces work Industry personnel labor intensity, improves drivage efficiency, is that operating personnel has safely provided powerful guarantee.New Coal Mine tunnel Zong Jue faces Temporary support device it is main by left and right supporting mechanism by crossbeam, extensible canopy, front-axle beam, shield meet head on beam, lift bottom and take a step walking mechanism And auxiliary support mechanism is hinged composition.Front-axle beam is provided with steel band groove and can realize to anchor in the advance support of top board and mechanization Net and steel band.Take a step walking mechanism, base and auxiliary support mechanism of lift bottom mutually supports roof and floor, so as to enable mutually form one The individual reliable strong point, realizes taking a step from shifting for temporary support device.
Specifically, New Coal Mine tunnel Zong Jue faces temporary support device, mainly including left supporting mechanism 1, right supporting machine Structure 2, front support leg 3, rear support leg 8, auxiliary support mechanism 5, front-axle beam 10 and extensible canopy 13.Left supporting mechanism 1 and right supporting machine Structure 2 meets head on beam 9 by connecting cross beam 20, front-axle beam 10, shield and bearing pin is connected as a single entity.Described left supporting mechanism 1 and right supporting machine Structure 2 includes base 4, guide beam 15, column 19, left back timber 16 and right back timber 17.Front support leg 3 and rear support leg 8 pass through slide rail 7 Connect as one.Support longeron 18 is arranged on connecting cross beam 20, and is connected as a single entity by telescopic oil cylinder 14 with extensible canopy 13.Stretch Contracting beam 13 is connected as a single entity with front-axle beam 10 by front-axle beam jack 12.Front-axle beam 10 and shield beam 9 of meeting head on are met head on beam jack 11 by shield It is connected as a single entity.Passage oil cylinder 6 is respectively disposed between left and right base 4 and front support leg.
Described front support leg 3 and rear support leg 8, connects as one to form lift by slide rail 7, passage oil cylinder 6 and base 4 Bottom is taken a step walking mechanism.
Described extensible canopy 13 forms telescoping mechanism, the stroke of telescopic oil cylinder 14 with support longeron 18 by telescopic oil cylinder 14 Anchor pole array pitch with tunnel is consistent, is capable of achieving the gib of the super previous array pitch in comprehensive pick face tunnel.
The front end of described front-axle beam 10 is respectively provided with steel band groove with middle part, and the steel band groove of front end can be by front-axle beam jack 12 Stretch to receive and realize that steel band is laid with the mechanization of piece net.
Described auxiliary support mechanism 5 is connected as a single entity by the take a step rear support leg 8 of walking mechanism of bearing pin and lift bottom, when auxiliary After helping the support of supporting mechanism 5, a strong point for stabilization can be provided for temporary support device.
Described base 4 is provided with engaging lug 21, tuningout oil cylinder can be connected by bearing pin, to comprehensive pick face temporary support device Carry out tuningout;Also mutual side board can be connected, prevents the coal cinder of tunnel wall caving from falling into inside comprehensive pick face temporary support device.
Described passage oil cylinder 6 arranges the inside with the base 4 of left and right supporting mechanism 1,2, simple and compact for structure.
The present invention is capable of achieving to the intimate without supporting repeatedly of back, and its compact conformation, operation is flexible, can carry significantly Driving speed high and operating efficiency.With fully-mechanized digging machine Rational Matching, it is simple to operate, have enough supporting intensities, simplify supporting program, Reduce move sortie number, realize the top board of tunneling boring supporting driving face empty top zone, it is ensured that the operating personnel of driving face and Development machine is in a safe condition;The mode of working continuously that driving, gib and permanent Anchor Care are synchronously carried out is realized, is reduced former Begin to come and go the gib time;The original labour for shouldering fortune, removing monomer of worker is reduced, realizes that driving face mechanization is propped up temporarily Shield, reduces labor strength.

Claims (6)

1. a kind of temporary support device in new colliery Zong Juemian tunnels, it is characterised in that:Including left supporting mechanism(1), it is right Supporting mechanism(2), front support leg(3), rear support leg(8), front-axle beam(10)And extensible canopy(13), left supporting mechanism(1)With right branch Shield mechanism(2)By connecting cross beam(20), front-axle beam(10), shield meets head on beam(9)It is connected as a single entity with bearing pin, described left supporting mechanism (1)With right supporting mechanism(2)Structure is identical, including base(4), guide beam(15), column(19)And back timber, base(4)It is upper solid Surely there is column(19), column(19)Top is provided with back timber, base(4)Inside it is provided with slide rail(7), front support leg(3)And rear support leg (8)By slide rail(7)Connect as one, support longeron(18)It is arranged in connecting cross beam(20)On, connecting cross beam(20)It is fixed on On back timber, support longeron(18)With extensible canopy(13)By telescopic oil cylinder(14)Connection, extensible canopy(13)With front-axle beam(10)Pass through Front-axle beam jack(12)Connection, front-axle beam(10)Met head on beam with shield(9)By protecting beam jack of meeting head on(11)It is connected as a single entity, base (4)With front support leg(3)Between be respectively disposed with passage oil cylinder(6).
2. New Coal Mine tunnel Zong Jue faces according to claim 1 temporary support device, it is characterised in that:Described is flexible Beam(13)With support longeron(18)By telescopic oil cylinder(14)Form telescoping mechanism, telescopic oil cylinder(14)Stroke and tunnel anchor Bar array pitch is consistent.
3. New Coal Mine tunnel Zong Jue faces according to claim 1 temporary support device, it is characterised in that:Described front-axle beam (10)Front end and middle part be respectively provided with steel band groove.
4. New Coal Mine tunnel Zong Jue faces according to claim 1 and 2 temporary support device, it is characterised in that:Also include Auxiliary support mechanism(5), described auxiliary support mechanism(5)By bearing pin and rear support leg(8)It is connected as a single entity.
5. New Coal Mine tunnel Zong Jue faces according to claim 1 and 2 temporary support device, it is characterised in that:Described Base(4)It is provided with engaging lug(21).
6. New Coal Mine tunnel Zong Jue faces according to claim 1 and 2 temporary support device, it is characterised in that:Described Passage oil cylinder(6)It is arranged in base(4)Inside.
CN201611264544.4A 2016-12-30 2016-12-30 Novel temporary supporting device for coal mine roadway comprehensive digging face Pending CN106677813A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107989607A (en) * 2017-12-27 2018-05-04 中国煤炭科工集团太原研究院有限公司 Rectangular shaped roadways driving moves into covering device certainly without support repeatedly
CN109339845A (en) * 2018-12-24 2019-02-15 永城煤电控股集团有限公司 A kind of automatic moving type advance timbering
CN110159327A (en) * 2019-07-10 2019-08-23 河南理工大学 Dig the continuous temporary support device for drivage in tunnel and method of anchor separation
CN110259497A (en) * 2018-11-24 2019-09-20 张国宁 Gun diging face caterpillar band mobile Foldable hydraulic forestope
CN110894789A (en) * 2019-12-12 2020-03-20 抚顺综掘装备制造有限公司 Shed-erecting type onboard temporary supporting device
CN111810204A (en) * 2020-06-18 2020-10-23 中铁十六局集团地铁工程有限公司 Fine adjustment anchorage device and method capable of compensating prestress loss of water-rich sand layer
CN116136179A (en) * 2023-04-03 2023-05-19 江西蓝翔重工有限公司 Disconnect-type support platform

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CN2687340Y (en) * 2004-03-03 2005-03-23 开滦(集团)有限责任公司机电总厂 Big-incidence low-position coal-caving hydraulic prop
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CN201857985U (en) * 2010-11-13 2011-06-08 枣庄矿业(集团)有限责任公司第二机械厂 Sliding roof beam advance timbering support
CN203145979U (en) * 2012-12-04 2013-08-21 河南南车重型装备有限公司 Tunnel forepoling hydraulic bracket
CN203905988U (en) * 2014-07-01 2014-10-29 铁法煤业集团机械制造有限责任公司 Slip type temporary supporting bracket
CN104481566A (en) * 2014-09-18 2015-04-01 中国煤炭科工集团太原研究院有限公司 Fully-mechanized excavation face automatic anchoring and sliding rail type walking temporary support
CN104790997A (en) * 2015-03-26 2015-07-22 北京科技大学 Self-moving advance temporary supporting hydraulic bracket used for fully-mechanized excavation
CN206845207U (en) * 2016-12-30 2018-01-05 中国煤炭科工集团太原研究院有限公司 New Coal Mine tunnel Zong Jue faces temporary support device

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DE4130825A1 (en) * 1991-09-17 1993-03-18 Westfalia Becorit Ind Tech Advancing mine roof support - has hinge connected roof and floor members with hydraulic cylinders, followed by working face protection unit
CN2687340Y (en) * 2004-03-03 2005-03-23 开滦(集团)有限责任公司机电总厂 Big-incidence low-position coal-caving hydraulic prop
CN201137499Y (en) * 2007-12-04 2008-10-22 沈阳天安矿山机械科技有限公司 Novel advance support bracket for roadway excavation
CN201857985U (en) * 2010-11-13 2011-06-08 枣庄矿业(集团)有限责任公司第二机械厂 Sliding roof beam advance timbering support
CN203145979U (en) * 2012-12-04 2013-08-21 河南南车重型装备有限公司 Tunnel forepoling hydraulic bracket
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107989607A (en) * 2017-12-27 2018-05-04 中国煤炭科工集团太原研究院有限公司 Rectangular shaped roadways driving moves into covering device certainly without support repeatedly
CN110259497A (en) * 2018-11-24 2019-09-20 张国宁 Gun diging face caterpillar band mobile Foldable hydraulic forestope
CN109339845A (en) * 2018-12-24 2019-02-15 永城煤电控股集团有限公司 A kind of automatic moving type advance timbering
CN109339845B (en) * 2018-12-24 2024-03-29 永城煤电控股集团有限公司 Self-moving type advanced support
CN110159327A (en) * 2019-07-10 2019-08-23 河南理工大学 Dig the continuous temporary support device for drivage in tunnel and method of anchor separation
CN110159327B (en) * 2019-07-10 2023-08-22 河南理工大学 Continuous tunneling temporary support device and method for tunnel with separated tunneling and anchoring
CN110894789A (en) * 2019-12-12 2020-03-20 抚顺综掘装备制造有限公司 Shed-erecting type onboard temporary supporting device
CN111810204A (en) * 2020-06-18 2020-10-23 中铁十六局集团地铁工程有限公司 Fine adjustment anchorage device and method capable of compensating prestress loss of water-rich sand layer
CN116136179A (en) * 2023-04-03 2023-05-19 江西蓝翔重工有限公司 Disconnect-type support platform
CN116136179B (en) * 2023-04-03 2023-11-21 江西蓝翔重工有限公司 Disconnect-type support platform

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Application publication date: 20170517