CN102748055B - Circulation advancing type forepoling support - Google Patents
Circulation advancing type forepoling support Download PDFInfo
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- CN102748055B CN102748055B CN201210248890.9A CN201210248890A CN102748055B CN 102748055 B CN102748055 B CN 102748055B CN 201210248890 A CN201210248890 A CN 201210248890A CN 102748055 B CN102748055 B CN 102748055B
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- 230000007246 mechanism Effects 0.000 claims abstract description 45
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- 239000010959 steel Substances 0.000 claims abstract description 15
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 230000003028 elevating effect Effects 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 6
- 230000032258 transport Effects 0.000 claims description 3
- 238000005065 mining Methods 0.000 description 12
- 239000003245 coal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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Abstract
A circulation advancing type forepoling support solves the problems that in the prior art, a timbering structure moves troublesomely, efficiency is low, and the like. The circulation advancing type forepoling support comprises top beams, bases, hydraulic upright columns and multistage inserting connecting rod type guiding mechanisms, and the hydraulic upright columns are hinged between the top beams and the bases. The technical scheme includes that the integral top beam with a hoisting mechanism and the integral base form a hoisting support, and each split top beam and the corresponding split base which are parallel form a forepoling support; an extending end of a telescopic cantilever beam at the front of the integral top beam and the split top beam jointly support transverse steel beams, and a monorail hoist for conveying the forepoling supports moves along sectional guide rails which are arranged at the bottoms of the transverse crossbeams and connected with each other; and an extending end of a support moving hydraulic cylinder on the integral base is connected with the split bases through connectors. The circulation advancing type forepoling support is compact in structure, reasonable in design, stable in timbering and moving, simple and convenient to operate and safe and reliable in use, required safe passing space in a tunnel can be guaranteed, and mechanical forepoling for continuously supporting a roof of the tunnel is realized.
Description
Technical field
The present invention relates to a kind of advanced stand device for the safety work of mining stope, particularly a kind of for normal working face mining operation time, in tunnel, work plane two ends, carry out the advance support in tunnel, and the circulation protrusive advance support rack that can move with the propelling of working face mining.Belong to mining machinery manufacture and application.
Background technology
In the stope of coal mines operation of modern fully-mechanized mining, according to the regulation of the corresponding rules of country, within the scope of 20 meters of ahead work face, must add strong supporting.At present, this type of advanced stand device is disclosed in some corresponding patent documentations, mainly containing patent publication No. is CN101182780A " a kind of coal mine down-hole splited articulated look ahead supporting support ", notification number be CN2828315Y's " Straddle type leading support for coal mine comprehensive coal mining haulage drift ", " Combined forepoling rack for comprehensive mining return " of CN2833112Y, " the coal mine work area crossheading forepoling hydraulic support " of CN200952403Y, " the lame advanced supporting rack group of inclined roof panels " of CN201190570Y and the patent announcement number of inventor's earlier application are " lame advanced supporting rack " of CN200985799Y etc.What the inventor once existed for above-mentioned patent is difficult to the interior elevating conveyor of haulage gate (machine lane) to arrange that a gang of mechanization in tunnel is from moving supporting problem, designing a kind of patent announcement number is CN201386567Y " tunnel ahead support stent ", although it can adopt the push-and-pull that moves frame hydraulic cylinder to realize the movement of support, the equipment that meets to a certain extent fully-mechanized mining working is installed, the requirement of operation and maintenance condition, can guarantee needed safe walkway in machine lane, but when the distance of lame advanced supporting section need to reach 20 meters or when above, due to increasing of the quantity of installed support, the weak point of this plug-type move mode of advance support rack has just displayed.And " lifting vehicle for transporting rail advanced support bracket " that notification number is CN201193201Y, " hoisting stand for mining " that publication number is CN101463728A, can not meet the long object moving apart from advance support rack in actual applications.And " after-frame becomes front posture continuous supporting advance timbering and moves frame method " that publication number is CN101864975A, be adopt two supports each other fulcrum move frame in the middle part of drift section, rely on drawing of front, tunnel to move a little, after-frame group is moved to the anterior mode of side arm group.This kind of moving manner too theorizes, and can be very not smooth in the most situation of the base plate in tunnel, in the ground moving process of long distance, the track of walking is difficult to guarantee, can often there is the phenomenon such as support tilt and holding, speed and effect that impact moves frame, the propelling that the face that dallies over one's work is mined, existence can not adapt to on-the-spot actual use needs, the problem that is difficult to accomplish the end in view.Existing dependence moves the advance support rack structure that the push-and-pull of frame hydraulic cylinder is moved, lame advanced supporting for longer distance lacks applicability, and advancing velocity is slower, complex operation, especially move frame all needs all advance support racks all to move one time at every turn, and operating efficiency is low.Therefore, existing advance support rack is unfavorable for supporting and the management of top board, and the safe high-yield and high-efficiency that affects working face mining operation is produced.
Summary of the invention
The object of this invention is to provide a kind of circulation protrusive advance support rack, solve prior art the long supporting existing apart from advance support in tunnel has been moved to the problems such as frame complex operation, efficiency are low, its compact conformation, reasonable in design, supporting and mobile stable, simple to operation, safe and reliable, in guaranteeing safe pedestrian space required in tunnel, realize the mechanization advance support that back is supported continuously.
The technical solution adopted in the present invention is: this circulation protrusive advance support rack comprises back timber, base and be hinged on back timber and base between the elevating mechanism being formed by hydraulic vertical prop and Multistage plug-in connecting rod type guiding mechanism, its technical essential is: described back timber is arranged to monolithic back timber and split type back timber, base is arranged to Integral pedestal and Split type base, and form hoisting bracket by the monolithic back timber with derricking gear and Integral pedestal and elevating mechanism, form one group of advance timbering by two split type back timbers arranged side by side and two Split type bases and elevating mechanism, the front portion of monolithic back timber is hinged by the telescopic cantilever beam of swing arm Driven by Hydraulic Cylinder, the external part of telescopic cantilever beam and the horizontal girder steel of the common support of the split type back timber of advance timbering that utilize cantilever telescopic hydraulic cylinder to drive, at each horizontal steel beam bottom, interconnective sectional guide rail is set respectively, the road wheel that transports the overhead trolley of advance timbering moves along interconnective sectional guide rail length direction, the external part that moves frame hydraulic cylinder hinged on Integral pedestal is connected with Split type base by connector, advance timbering without connector on Split type base moves by the overhead trolley being arranged on derricking gear and the interconnective sectional guide rail on monolithic back timber.
Be arranged on the telescoping mechanism with suspension hook that derricking gear on the monolithic back timber of described hoisting bracket mainly comprises that the rotating mechanism, oscillating motor and the telescopic hydraulic cylinder that are driven by rotational hydraulic cylinder drive, be assembled in rotating mechanism on monolithic back timber hinged by oscillating motor and telescoping mechanism, be assembled in the hook lifting hydraulic cylinder of telescoping mechanism rear end by the hook lifting of drag cable assembly control telescoping mechanism front end.
Two described hoisting brackets that are arranged symmetrically with are assembled in respectively the front and back ends of lame advanced supporting section, at least three group advance timberings are set between two hoisting brackets, wherein the Split type base of two groups of advance timberings respectively by connector be assembled in the external part that moves frame hydraulic cylinder hinged on the Integral pedestal of lame advanced supporting section front and back ends and link together, all the other are respectively organized on the Split type base of advance timbering without connector.
Described Multistage plug-in connecting rod type guiding mechanism, is made up of guide rod casing, secondary fairlead and described Integral pedestal or Split type base; The middle part of the top of guide rod casing and described monolithic back timber or split type back timber is hinged, and insert in secondary fairlead bottom, and insert together in described Integral pedestal or Split type base with secondary fairlead.
Advantage and good effect that the present invention has are: because the present invention adopts the hoisting bracket that be made up of the monolithic back timber with derricking gear and Integral pedestal and elevating mechanism and form the advance timbering of a group by two split type back timbers arranged side by side and two Split type bases and elevating mechanism reasonably combined, the circulation protrusive that carries out advance support rack moves frame; And Integral pedestal is by moving frame hydraulic cylinder and the Split type base being connected with connector, realize the movement of hoisting bracket; The circulation of advance timbering is advanced to be derricking gear by arranging on monolithic back timber and to realize with the overhead trolley arranging on the connected sectional guide rail of horizontal girder steel, so its compact conformation is reasonable in design, supporting and mobile stable, simple to operation, safe and reliable.
In addition owing to adopting Multistage plug-in connecting rod type guiding mechanism to replace traditional quadric chain, with the lifting structure of hydraulic vertical prop composition hoisting bracket or advance timbering, make the advance timbering length designed shorter, small volume, weight is lighter, be convenient to realize lifting and the movement that circulation is advanced in operation process, meet the equipment mounting, commissioning and maintenance condition of fully-mechanized mining working, can adapt to the tunnel condition of down-hole actual mining faciostenosis.Therefore, the invention solves the supporting means that prior art exists falls behind, lacks applicability, moves the problems such as frame is loaded down with trivial details, efficiency is low for the lame advanced supporting of longer distance.In guaranteeing safe pedestrian space required in tunnel, can realize the mechanization advance support that back is supported continuously according to different geological conditions and cross-section shape of roadway, guarantee that the safe high-yield and high-efficiency of work plane is produced.
Accompanying drawing explanation
Fig. 1 is a kind of concrete structure schematic diagram of the present invention;
Fig. 2 is the sectional view of Fig. 1 along A-A line;
Fig. 3 is the sectional view of Fig. 1 along B-B line;
Fig. 4 is the structure for amplifying schematic diagram of the derricking gear in Fig. 1;
Fig. 5 is the upward view of Fig. 4.
Sequence number explanation in figure: 1 monolithic back timber, 2 derricking gears, 3 swing arm hydraulic cylinders, 4 telescopic cantilever beams, 5 cantilever telescopic hydraulic cylinders, 6 overhead trolleys, 7 split type back timbers, 8 horizontal girder steels, 9 sectional guide rails, 10 hydraulic vertical props, 11 connectors, 12 Split type bases, 13 secondary fairleads, 14 guide rod casings, 15 move frame hydraulic cylinder, 16 Integral pedestals, 17 rotational hydraulic cylinders, 18 rotating mechanisms, 19 oscillating motors, 20 telescopic hydraulic cylinders, 21 telescoping mechanisms, 22 suspension hooks, 23 drag cable assemblies, 24 hook lifting hydraulic cylinders.
The specific embodiment
Describe concrete structure of the present invention in detail according to Fig. 1～5.This circulation protrusive advance support rack comprises back timber, base, is hinged on the elevating mechanism, hoisting bracket and the advance timbering that are made up of hydraulic vertical prop 10 and Multistage plug-in connecting rod type guiding mechanism between back timber and base.For the advance timbering length that makes to design is short, volume is little, lightweight, be convenient to lifting and movement that circulation is advanced in process, adopt Multistage plug-in connecting rod type guiding mechanism to substitute traditional quadric chain, with the hydraulic vertical prop composition elevating mechanism of hoisting bracket or the elevating mechanism of advance timbering.Wherein Multistage plug-in connecting rod type guiding mechanism adopts the formerly basic structure of patent (" Multistage plug-in connecting rod type filling hydraulic support " that notification number is CN201982127U) of the applicant of technology maturation, is made up of parts such as guide rod casing 14, secondary fairlead 13 and Integral pedestal 16 or Split type bases 12; The middle part of the top of guide rod casing 14 and monolithic back timber 1 or split type back timber 7 is hinged, and insert in secondary fairlead 13 bottom, and insert together in Integral pedestal 16 or Split type base 12 with secondary fairlead 13.
Back timber in the present embodiment is arranged to monolithic back timber 1 and split type back timber 7, and base is arranged to Integral pedestal 16 and Split type base 12, and forms hoisting bracket by the monolithic back timber 1 with derricking gear 2 and Integral pedestal 16 and elevating mechanism.Form one group of advance timbering by two split type back timbers 7 arranged side by side and two Split type bases 12 and elevating mechanism.Two hoisting brackets that are arranged symmetrically with are assembled in respectively the front and back ends of lame advanced supporting section, and at least three group advance timberings are set between two hoisting brackets.Wherein the Split type base 12 of two groups of advance timberings respectively by connector 11 be assembled in the external part that moves frame hydraulic cylinder 15 hinged on the Integral pedestal 16 of lame advanced supporting section front and back ends and link together, all the other are respectively organized on the Split type base 12 of advance timbering without connector 11.
The hinged telescopic cantilever beam 4 driving by swing arm hydraulic cylinder 3 in front portion of monolithic back timber 1, the external part of telescopic cantilever beam 4 and the multiple horizontal girder steels 8 of the split type back timber of advance timbering 7 common support that utilize cantilever telescopic hydraulic cylinder 5 to drive.In each horizontal girder steel 8 bottoms, sectional guide rail 9 is set respectively.Between each sectional guide rail 9, be mutually movably connected by conventional coupling assembling (not shown) so that quick connection therebetween with separate.The road wheel that transports the common overhead trolley 6 of advance timbering moves along the length direction of interconnective sectional guide rail 9.The external part that moves frame hydraulic cylinder 15 being hinged on Integral pedestal 16 is connected with Split type base 12 by connector 11.Advance timbering without connector 11 on Split type base 12 moves by the overhead trolley 6 being arranged on derricking gear 2 and the interconnective sectional guide rail 9 on monolithic back timber 1.In order to guarantee to advance in the longer interior rapidly and efficiently circulation that realizes advance timbering of advance support distance, advance timbering can be connected on overhead trolley 6 effectively, on the monolithic back timber 1 of hoisting bracket, derricking gear 2 is set.Integral pedestal 16, by moving frame hydraulic cylinder 15 and the Split type base 12 being connected with connector 11, is realized the movement of hoisting bracket; It is to realize by the derricking gear 2 of setting on monolithic back timber 1 and with the overhead trolley 6 arranging on the connected sectional guide rail 9 of horizontal girder steel 8 that the circulation of advance timbering is advanced.
The derricking gear 2 being arranged on the monolithic back timber 1 of hoisting bracket mainly comprises: the telescoping mechanism 21 with suspension hook 22 that rotating mechanism 18, oscillating motor 19 and the telescopic hydraulic cylinder 20 being driven by rotational hydraulic cylinder 17 drives.Realize the rotation of whole derricking gear 2 by rotational hydraulic cylinder 17.Be assembled in rotating mechanism on monolithic back timber 1 18 hinged by oscillating motor 19 and telescoping mechanism 21, telescoping mechanism 21 is realized upper and lower swing and forward and backward flexible under the drive of oscillating motor 19 and telescopic hydraulic cylinder 20.The hook lifting hydraulic cylinder 24 that is assembled in telescoping mechanism 21 rear ends is controlled suspension hook 22 liftings of telescoping mechanism 21 front ends by drag cable assembly 23.
When this circulation protrusive advance support rack operation, hoisting bracket is arranged in to the forward and backward two ends of lame advanced supporting section, and some groups of two advance timberings that are arranged in juxtaposition are set between hoisting bracket carry out the supporting to tunnel, acquiescence original state is that hydraulic vertical prop 10 rises, and supports respectively hoisting bracket and advance timbering.Swing arm hydraulic cylinder 3, cantilever telescopic hydraulic cylinder 5, move frame hydraulic cylinder 15, rotational hydraulic cylinder 17, oscillating motor 19 for stretching out state, telescopic hydraulic cylinder 20, hook lifting hydraulic cylinder 24 are all in retracted state.Adjust hydraulic vertical prop 10 and make monolithic back timber 1, Integral pedestal 16 and split type back timber 7, Split type base 12 connect reality with top, tunnel, base plate, prepare to carry out the advance support operation in tunnel with working face extraction.
While moving frame, the hydraulic vertical prop 10 of the elevating mechanism of the advance timbering that rear portion is arranged in juxtaposition near stope one end is regained, and makes the split type back timber 7 of advance timbering fall frame.At this moment telescopic cantilever beam 4 external parts that are arranged in the hoisting bracket at rear portion are still supporting top and are being connected with the horizontal girder steel 8 of sectional guide rail 9; Make to be arranged on rotating mechanism 18 on monolithic back timber 1 by rotational hydraulic cylinder 17 and rotate around axis, thus the advance timbering top that drives whole derricking gear 2 to turn to will to move; Adjust the flexible of oscillating motor 19, telescopic hydraulic cylinder 20 and hook lifting hydraulic cylinder 24, sling without the advance timbering of connector 11 with the suspension hook 22 of derricking gear 2 front portions, and the advance timbering of slinging is transferred on overhead trolley 6; Overhead trolley 6 drives advance timbering to move to the front portion of lame advanced supporting section along sectional guide rail 9, then advance timbering is moved to relevant position with the derricking gear 2 of anterior hoisting bracket.Another advance timbering that mobile rear portion is arranged in juxtaposition in the same way.
After one group of advance timbering arranged side by side moves into place, rise the hydraulic vertical prop 10 of the elevating mechanism of advance timbering, support back, and support horizontal girder steel 8 simultaneously.The hydraulic vertical prop of the hoisting bracket at rear portion 10 is regained, unloaded sectional guide rail 9 and horizontal girder steel 8 that telescopic cantilever beam 4 supports, and be connected to the front portion of whole piece sectional guide rail 9; Withdrawal moves frame hydraulic cylinder 15 and makes, after a step pitch of hoisting bracket reach at rear portion, to rise hydraulic vertical prop 10, makes hoisting bracket support top board and horizontal girder steel 8; Connector 11 is unloaded, stretch out and move frame hydraulic cylinder 15, and be connected on the Split type base 12 of one group of advance timbering being arranged in juxtaposition above moving frame hydraulic cylinder 15 use connectors 11.
For the reach of anterior hoisting bracket, to unload lower union joint 11, withdrawal moves frame hydraulic cylinder 15, be connected to just from rear portion moves forward the Split type base 12 of advance timbering of that group of putting in place moving frame hydraulic cylinder 15 with connector 11, regain the hydraulic vertical prop 10 of anterior hoisting bracket, and stretch out and move frame hydraulic cylinder 15, pass after a step pitch of hoisting bracket reach, rise hydraulic vertical prop 10, make hoisting bracket support top board and horizontal girder steel 8.Repeat above-mentioned by be positioned at the advance timbering that rear portion is arranged in juxtaposition fall frame, sling, along steps such as guide rail move, the mode that the advance timbering at rear portion is advanced with circulation moves to front portion, reaches all advance support racks object moving forward that circulates.
Claims (4)
1. a circulation protrusive advance support rack, comprise back timber, base and be hinged on back timber and base between the elevating mechanism being formed by hydraulic vertical prop and Multistage plug-in connecting rod type guiding mechanism, it is characterized in that: described back timber is arranged to monolithic back timber and split type back timber, base is arranged to Integral pedestal and Split type base, and form hoisting bracket by monolithic back timber and Integral pedestal with derricking gear, form one group of advance timbering by two split type back timbers and two Split type bases arranged side by side; The front portion of monolithic back timber is hinged by the telescopic cantilever beam of swing arm Driven by Hydraulic Cylinder, the external part of telescopic cantilever beam and the horizontal girder steel of the common support of the split type back timber of advance timbering that utilize cantilever telescopic hydraulic cylinder to drive, at each horizontal steel beam bottom, interconnective sectional guide rail is set respectively, the road wheel that transports the overhead trolley of advance timbering moves along interconnective sectional guide rail length direction; The external part that moves frame hydraulic cylinder hinged on Integral pedestal is connected with Split type base by connector; Advance timbering without connector on Split type base moves by the overhead trolley that is arranged on the derricking gear on monolithic back timber and be arranged on interconnective sectional guide rail.
2. circulation protrusive advance support rack according to claim 1, it is characterized in that: be arranged on the telescoping mechanism with suspension hook that derricking gear on the monolithic back timber of described hoisting bracket mainly comprises that the rotating mechanism, oscillating motor and the telescopic hydraulic cylinder that are driven by rotational hydraulic cylinder drive, be assembled in rotating mechanism on monolithic back timber hinged by oscillating motor and telescoping mechanism, be assembled in the hook lifting hydraulic cylinder of telescoping mechanism rear end by the hook lifting of drag cable assembly control telescoping mechanism front end.
3. circulation protrusive advance support rack according to claim 1, it is characterized in that: two described hoisting brackets that are arranged symmetrically with are assembled in respectively the front and back ends in lame advanced supporting section, at least three group advance timberings are set between two hoisting brackets, wherein the Split type base of two groups of advance timberings respectively by connector be assembled in the external part that moves frame hydraulic cylinder hinged on the Integral pedestal of lame advanced supporting section front and back ends and link together, all the other are respectively organized on the Split type base of advance timbering without connector.
4. circulation protrusive advance support rack according to claim 1, is characterized in that: described Multistage plug-in connecting rod type guiding mechanism, is made up of guide rod casing, secondary fairlead and described Integral pedestal or Split type base; The middle part of the top of guide rod casing and described monolithic back timber or split type back timber is hinged, and insert in secondary fairlead bottom, and insert together in described Integral pedestal or Split type base with secondary fairlead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210248890.9A CN102748055B (en) | 2012-07-18 | 2012-07-18 | Circulation advancing type forepoling support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210248890.9A CN102748055B (en) | 2012-07-18 | 2012-07-18 | Circulation advancing type forepoling support |
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| Publication Number | Publication Date |
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| CN102748055A CN102748055A (en) | 2012-10-24 |
| CN102748055B true CN102748055B (en) | 2014-06-18 |
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| CN201210248890.9A Active CN102748055B (en) | 2012-07-18 | 2012-07-18 | Circulation advancing type forepoling support |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500117B (en) * | 2014-12-10 | 2016-10-05 | 中煤北京煤矿机械有限责任公司 | Without repeatedly supporting continuous supporting advanced hydraulic support |
| CN107143363B (en) * | 2017-07-17 | 2023-03-28 | 平顶山平煤机煤矿机械装备有限公司 | Transversely-arranged air duct advanced support group for stable support |
| CN108657949B (en) * | 2018-05-09 | 2020-05-12 | 河北煤炭科学研究院 | Pneumatic monorail crane installation device and method |
| CN109555550A (en) * | 2018-11-06 | 2019-04-02 | 郑州合新科技有限公司 | Gob side entry retaining circulatory self-moving formula support frame assembly |
| CN110145347B (en) * | 2019-07-05 | 2020-06-12 | 山东科技大学 | Temporary support equipment for tunneling working face and working method thereof |
| CN112282803B (en) * | 2020-10-09 | 2022-11-22 | 山东塔高矿业机械装备制造有限公司 | Supporting device and method for fully mechanized coal mining face transportation crossheading and application of supporting device and method |
| CN112576301B (en) * | 2020-12-15 | 2022-08-16 | 郑州煤矿机械集团股份有限公司 | Fully-mechanized mining face transportation crossheading unit support carrying system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1438796A (en) * | 1972-06-14 | 1976-06-09 | Groetschel Karl Maria | Advancing mine support systems |
| DE3446043C1 (en) * | 1984-12-18 | 1986-06-19 | NLW Fördertechnik GmbH, 4232 Xanten | Face-boundary support |
| CN2755285Y (en) * | 2004-12-06 | 2006-02-01 | 煤炭科学研究总院太原分院 | Movable hydraulic supports for protruded support suspension in coal gallery |
| CN200985799Y (en) * | 2006-10-30 | 2007-12-05 | 沈阳天安矿山机械科技有限公司 | Roadway advance support bracket |
| CN201031709Y (en) * | 2007-05-29 | 2008-03-05 | 兖州煤业股份有限公司 | Fully Mechanized working faces along track end head bracket |
| CN101338684B (en) * | 2008-08-20 | 2011-06-29 | 天地科技股份有限公司 | Combined guided slipping type forepoling hydraulic support |
| CN201433778Y (en) * | 2009-03-03 | 2010-03-31 | 山东天晟煤矿装备有限公司 | Hydraulic support having a lifting function |
| CN202745906U (en) * | 2012-07-18 | 2013-02-20 | 沈阳天安矿山机械科技有限公司 | Circulatory advancing forepoling |
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