CN201225153Y - Rock lane digging and supporting construction drill - Google Patents
Rock lane digging and supporting construction drill Download PDFInfo
- Publication number
- CN201225153Y CN201225153Y CNU2008200770656U CN200820077065U CN201225153Y CN 201225153 Y CN201225153 Y CN 201225153Y CN U2008200770656 U CNU2008200770656 U CN U2008200770656U CN 200820077065 U CN200820077065 U CN 200820077065U CN 201225153 Y CN201225153 Y CN 201225153Y
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- rock
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- pedestal
- rake
- rig
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- 239000011435 rock Substances 0.000 title claims abstract description 90
- 238000010276 construction Methods 0.000 title claims abstract description 59
- 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 43
- 239000004575 stone Substances 0.000 claims description 42
- 239000002828 fuel tank Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 8
- 230000005641 tunneling Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 5
- 238000013467 fragmentation Methods 0.000 description 4
- 238000006062 fragmentation reaction Methods 0.000 description 4
- 238000009411 base construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/68—Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The utility model provides a construction drill for tunneling and supporting a rock gangway, which comprises a crawler travel part, a belt transportation part, a temporary support, a rock rake breaking part, two top-slope piled anchor cable drill parts capable of lifting and swinging and a hydraulic operating system. The construction drill is characterized in that three bases used for fixing cylinders are arranged on an operating platform, wherein two bases are used for fixing the top-slope piled anchor cable drill parts, and one base is used for fixing the temporary support and the rock rake breaking part; the base of the temporary support and the rock rake breaking part is arranged in the middle of the operating platform, and the base of the two top-slope piled anchor cable drill parts capable of lifting and swinging are respectively arranged at both sides of the operating platform. The utility model realizes the mechanization of embrasure tunneling construction, top-slope piled anchor cable construction, rock breaking, rack raking, crushed rock transportation and the temporary support in rock gangways of large, medium and small coal mine, provides complete technological equipment, creates most basic conditions for the safe production of the large, medium and small coal mine, and fully, systematically and thoroughly solves the problems of the prior supporting and protecting equipment for tunneling the rock gangway.
Description
Technical field
The utility model relates to driving and support apparatus under the coal mine, is the construction machinery that is applicable to ore deposit stone drifting of large, medium and small moulded coal and anchor bar anchor cable supporting.
Background technology
At present, the main mode of all kinds of rock roadway in coal mine drivings is the big gun pick, and support pattern is anchor pole, anchor cable, joist, anchor net combination supporting.The big gun pick is the perforating of gas leg type air drill, powder charge, blows out; Blow out the spoil that falls, earlier artificial fragmentation adopts rock rake to transport work plane again; After the work plane spoil cleans out, use the monomer air drill to carry out the anchor shaft anchor cable supporting.There is following problem in this employing stone drifting job practices:
1, the tunnelling section is little: excavated section is generally at 15m
2About, when head-room surpasses 2m, must just can carry out top-assisting anchor rod and anchor cable construction by scaffolding.
2, on-mechanical equalization, borehole construction, spoil fragmentation are manual work, and the top anchor shaft anchor cable construction in supporting tunnel still is the operation of monomer air drill, and assisting anchor rod and anchor cable construction adopts the jackhammer operation, the thrust of perforating derives from people's arm and arm, and worker's labour intensity is big.Because assisting anchor rod and anchor cable construction mainly relies on manpower, the construction quality of assisting anchor rod and anchor cable can not fundamentally be guaranteed.
3, speed of application is slow.Build and remove scaffold when the construction section surpasses 2m and need a large amount of time; The super past tense 300mm of spoil width just must hand breaking, otherwise can destroy main fortune system, goes fragmentation so will spend a large amount of time.Advance of working cycle is low, all in 2m.
4, efficient is low: owing to perforating, broken spoil, anchor shaft anchor cable supporting are manual work, the constructor is many, causes operating efficiency low.
5, safety factor is low: the constructor is staggered operation in the high-altitude, and the job safety environment is poor.Perforating, broken spoil, anchor shaft anchor cable supporting be operation under the sky top all, exists potential safety hazard.
Summary of the invention
The purpose of this utility model is exactly to solve the problem that the stone drifting construction exists under the above-mentioned coal mine, a kind of raising stone drifting advance of working cycle and speed are provided, reduce constructor's labour intensity, reduce the constructor, improve operating efficiency, create the safety work environment, and have voluntarily and to move, borehole construction, spoil fragmentation, transportation, liftable anchor bar anchor cable construction, possess functions such as temporary lining function, superelevation roadway support, adopt full hydraulic system transmission, the stone drifting that explosion-proof performance and security performance are good and supporting construction rig.
The technical solution of the utility model is to achieve these goals:
Stone drifting and supporting construction rig comprise that track unit 1 and belt transport section 2, temporary lining and the broken petrosa of rake rock divide the anchor bar anchor cable rig part 4 of 3, two liftables and swing, hydraulic pressure and operating system 7; Described transport section is to constitute by pushing away cash rake rock shovel board and a belt conveyer, pushes away the place ahead that cash rake rock shovel board is contained in described track unit, and belt conveyer is installed in the rear of shovel board and the centre of crawler travel portion; An operating platform 5 is equipped with in the top of described track unit, it is characterized in that: three pedestals 6 that are used for fixing oil cylinder are arranged on operating platform, wherein two pedestals are used for fixing anchor bar anchor cable rig part, and a pedestal is used for fixing temporary lining and the broken petrosa branch of rake rock.The pedestal that described temporary lining and the broken petrosa of rake rock divide is in the centre of operating platform, and the pedestal of the anchor bar anchor cable rig of described two liftables and swing part is in the both sides of operating platform.
Described temporary lining and the broken petrosa of rake rock divide 3 to comprise cantilever arm 301, cantilever arm oil cylinder 302, swing arm 303, boom cylinder 304, temporary support device 305, broken rock hammer device 306, rake rock screen device 307; Described cantilever arm and pedestal 6 usefulness bearing pins are hinged, and the cantilever arm oil cylinder is loaded on cantilever arm below and the pedestal, and the centre of swing arm and cantilever arm are hinged with bearing pin, and boom cylinder is loaded on the top and cantilever arm of swing arm; Described temporary support device is loaded on the top of swing arm, and broken rock hammer device is loaded on the outside, lower end of swing arm, and rake rock screen device is loaded on the inboard, lower end of swing arm.Described temporary support device is by the claw-like trailing arm that is loaded on the swing arm top, and the pallet that is contained in end claw-like trailing arm is formed.Described swing arm can drive temporary support device, broken rock hammer device, rake rock screen device, can be swung under the oil cylinder of pedestal promotes by cantilever arm, and being promoted down by the cantilever arm oil cylinder can oscilaltion, and by seesawing under the boom cylinder promotion.
Described anchor bar anchor cable rig part 4 comprises angle modulation oil cylinder 404, hoist cylinder 405, T-bar 406 and hydraulic drill rig steering mechanism 407 thereof in hydraulic drill rig 401, lifting arm 402, sleeve arm 403, the sleeve; The frame of described hydraulic drill rig one end of the hinged T-bar of bearing pin, lifting arm and sleeve arm are hinged on respectively on T-bar and the pedestal 6 (rotor) with bearing pin, the piston of the angle modulation oil cylinder inner core of bearing pin hinged sleeve arm in the sleeve, the cylinder body of its angle modulation oil cylinder urceolus of bearing pin hinged sleeve arm, hoist cylinder is with on the urceolus of bearing pin hinged sleeve arm and the pedestal 6 (rotor), and hydraulic drill rig steering mechanism is contained on the T-bar.
Described pedestal 6 comprises pedestal 601, rotor 602, rotating shaft 603, rotational fuel tank 604; Described pedestal is contained on the operating platform 5, and rotor is loaded in the pedestal by rotating shaft, and the cylinder body of rotational fuel tank is hinged on below the pedestal with bearing pin, and the piston of rotational fuel tank is hinged with bearing pin and rotor.
Stone drifting that the utility model provides and supporting construction rig compared with prior art have outstanding substantive distinguishing features to be:
(1), hydraulic drill rig can realize upwards, forward, the rotation of (right side) three directions left, thereby finish the construction of borehole construction, anchor bar anchor cable.
(2), rake rock screen drawn the advantage of farm implements rakes, merged the operating principle of rock rake slusher, added modern hydraulic system, solved the rake rock difficult problem in the stone drifting.
(3), the use of broken rock pneumatic hammer realized broken rock mechanization, accelerated the work plane rock outward transport time.
(4), the use of temporary lining has guaranteed operating personnel's safety.
Stone drifting of the present utility model and supporting construction rig are stone drifting and supporting device therefor, can move freely by crawler travel in the tunnel.
Remarkable technological progress for stone drifting and supporting construction is:
1, stone drifting and supporting construction rig perforating speed of application are fast, and excavated section is big, and section configuration is many, and safe and reliable volume is little, and is in light weight, and compliance is strong.Present stone drifting hand-holing, artificial supporting, broken rock difficulty, transportation restriction, no temporary lining, the slow driving difficult problem of speed of application have been solved.Multiple functions such as that stone drifting and supporting construction rig have is removable, borehole and top-assisting anchor rod and anchor cable construction, temporary lining, superelevation roadway support, broken rock rake rock, detritus transportation adopt the full hydraulic system transmission, and explosion-proof performance and security performance are good.
2, to innovation to some extent on existing stone drifting technology and the technical equipment, make borehole construction, top-assisting anchor rod and anchor cable construction, broken rock rake rock, detritus transportation, temporary lining realize mechanization, driving speed improves greatly, is increased to 4 meters by 1 meter of per tour driving amount of equal big section.
3, safety factor height.Because stone drifting and supporting construction rig have temporary support device, can be before the anchor shaft anchor cable supporting supporting roof effectively, field operation personnel's safety is guaranteed.
4, personnel selection is few, the efficient height.Adopt jackhammer construction assisting anchor rod and anchor cable, every bench drill machine needs 2 people at least, and the construction number of per tour assisting anchor rod and anchor cable is at least 12 people; After adopting stone drifting and supporting construction rig, the top-assisting anchor rod and anchor cable construction number needs 4 people altogether.
In a word, stone drifting of the present utility model and supporting construction rig have improved stone drifting technical level under the coal mine, especially for realizing the construction of large, medium and small rock roadway in coal mine pick borehole, top-assisting anchor rod and anchor cable construction, broken rock rake rock, detritus transportation, temporary lining machineryization, complete technical equipment is provided, realize safety in production for large, medium and small colliery and created the most basic condition, comprehensively, system, solved the serious problems that existing stone drifting supporting equipment exists completely.
Description of drawings
Fig. 1 is stone drifting and supporting construction rig front view;
Fig. 2 is stone drifting and supporting construction rig vertical view;
Fig. 3 is that temporary lining and the broken petrosa of rake rock divide front view;
Fig. 4 is that temporary lining and the broken petrosa of rake rock divide vertical view;
Fig. 5 is the front view of rake rock screen device;
Fig. 6 is the lateral view of rake rock screen device;
Fig. 7 is the rig part front view of anchor bar anchor cable rig;
Fig. 8 is the rig part vertical view of anchor bar anchor cable rig;
Fig. 9 is that local amplification of base construction shown front view;
Figure 10 is that local amplification of base construction shown vertical view;
Figure 11 is that stone drifting and supporting construction rig rake rock screen device lift the process schematic diagram;
Figure 12 is stone drifting and supporting construction rig rake rock screen device dropping process schematic diagram;
Figure 13 is stone drifting and supporting construction rig rake rock screen device rake rock action schematic diagram;
Figure 14 is that stone drifting and supporting construction rig hydraulic drill rig rotate schematic diagram;
Figure 15 is stone drifting and supporting construction rig temporary lining swing schematic diagram;
The specific embodiment
Be elaborated below in conjunction with accompanying drawing:
Illustrated in figures 1 and 2, stone drifting of the present utility model and supporting construction rig.Stone drifting and supporting construction rig comprise that track unit 1 and belt transport section 2, temporary lining and the broken petrosa of rake rock divide anchor bar anchor cable rig part 4, hydraulic pressure and the operating system 7 of 3, two liftables and swing; Described transport section is to constitute with the wide belt conveyer of shovel board and 600mm by pushing away cash rake rock, pushes away cash and harrows the place ahead that the rock shovel board is contained in described track unit, and belt conveyer is installed in the rear of shovel board and the centre of crawler travel portion; An operating platform 5 is equipped with in the top of described track unit, three pedestals 6 that are used for fixing oil cylinder are arranged on operating platform, wherein two pedestals are used for fixing anchor bar anchor cable rig part, and a pedestal is used for fixing temporary lining and the broken petrosa branch of rake rock.The pedestal that described temporary lining and the broken petrosa of rake rock divide is in the centre of operating platform, and the pedestal of the anchor bar anchor cable rig of described two liftables and swing part is in the both sides of operating platform.
Fig. 3 and shown in Figure 4, temporary lining and the broken petrosa branch of rake rock.Temporary lining and the broken petrosa of rake rock divide 3 to comprise cantilever arm 301, cantilever arm oil cylinder 302, swing arm 303, boom cylinder 304, temporary support device 305, broken rock gas (liquid) hammer device 306, rake rock screen device 307; Described cantilever arm and pedestal 6 (rotor) are hinged with bearing pin, and the cantilever arm oil cylinder is loaded on cantilever arm below and the pedestal 6 (rotor), and the centre of swing arm is hinged with cantilever arm usefulness bearing pin, and boom cylinder is loaded on the top and cantilever arm of swing arm; Described temporary support device is loaded on the top of swing arm, and broken rock (gas or liquid) hammer device is loaded on the outside, lower end of swing arm, and rake rock screen device is loaded on the inboard, lower end of swing arm.Described temporary support device is by the claw-like trailing arm that is loaded on the swing arm top, and the pallet that is contained in end claw-like trailing arm is formed.Described swing arm can drive temporary support device, broken rock (gas or liquid) hammer device, rake rock screen device, can swing under the oil cylinder of pedestal promotes by cantilever arm, being promoted down by the cantilever arm oil cylinder can oscilaltion, and by seesawing under the boom cylinder promotion.
Fig. 5 and shown in Figure 6, rake rock screen device.Rake rock screen device 307 is made up of screen 3071, rake rock oil cylinder 3072, rake rock tooth 3073 etc.; A plurality of rake rock teeth are housed on each screen, and screen is hinged on the inboard, lower end of swing arm, and rake rock oil cylinder is loaded on swing arm and the screen with bearing pin, and rake rock screen can seesaw under being promoted by rake rock oil cylinder.
Fig. 7 and shown in Figure 8, anchor bar anchor cable rig part.Anchor bar anchor cable rig part 4 comprises angle modulation oil cylinder 404, hoist cylinder 405, T-bar 406 and hydraulic drill rig steering mechanism 407 thereof in hydraulic drill rig 401, lifting arm 402, sleeve arm 403, the sleeve; The frame of described hydraulic drill rig one end of the hinged T-bar of bearing pin, lifting arm and sleeve arm are hinged on respectively on T-bar and the pedestal 6 (rotor) with bearing pin, the piston of the angle modulation oil cylinder inner core of bearing pin hinged sleeve arm in the sleeve, the cylinder body of its angle modulation oil cylinder urceolus of bearing pin hinged sleeve arm, hoist cylinder is with on the urceolus of bearing pin hinged sleeve arm and the pedestal 6 (rotor), and hydraulic drill rig steering mechanism is contained on the T-bar.
Fig. 9 and shown in Figure 10, the base construction schematic diagram; Pedestal 6 comprises pedestal 601, rotor 602, rotating shaft 603, rotational fuel tank 604; Described pedestal is contained on the operating platform 5, and rotor is loaded in the pedestal by rotating shaft, and the cylinder body of rotational fuel tank is hinged on below the pedestal with bearing pin, and the piston of rotational fuel tank is hinged with bearing pin and rotor.
Stone drifting of the present utility model and supporting construction rig comprise that the rig of hydraulic system, hydraulic drill rig hydraulic operation console, track unit, anchor bar anchor cable rig, broken rock gas (liquid) hammer device etc. all are to use prior art, just its structure is improved, done on the new layout, be optimized combination and integrated.As: track unit is the track unit that adopts engineering machinery, adopts general Hydraulic Power Transmission System etc.
Two liftables of stone drifting of the present utility model and supporting construction rig and the anchor bar anchor cable rig part 4 of swing shown in Figure 11-13, are stone drifting and supporting construction rig rake rock screen device running schematic diagrames; Shown in Figure 14, be that stone drifting and supporting construction rig hydraulic drill rig rotate schematic diagram; About every stone drifting and supporting construction rig two anchor bar anchor cable rig parts 4 are housed, the hydraulic drill rig that is positioned at the left side is only with to anticlockwise, and the hydraulic drill rig that is positioned at the right side is only with to right rotation.Hydraulic drill rig can before and after, move up and down, and rotatable 90 °, be mainly used in the construction of borehole, anchor bar anchor cable.
Shown in Figure 15, be stone drifting and the temporary lining of supporting construction rig swing schematic diagram; Stone drifting of the present utility model and supporting construction rig are equipped with a temporary lining and the broken petrosa of rake rock divides 3, and the motion mode of broken rock (gas or liquid) hammer device 306 is for moving up and down, and rake rock screen 7 motion modes are for seesawing.
Claims (5)
1, a kind of stone drifting and supporting construction rig, the anchor bar anchor cable rig that comprises track unit (1) and belt transport section (2), temporary lining and the broken petrosa branch (3) of rake rock, two liftables and swing is (4) partly, hydraulic pressure and operating system (7); Described transport section is to constitute by pushing away cash rake rock shovel board and a belt conveyer, and it pushes away the place ahead that cash rake rock shovel board is contained in described track unit, and belt conveyer is installed in the rear of shovel board and the centre of crawler travel portion; An operating platform (5) is equipped with in the top of described track unit; It is characterized in that: three pedestals (6) that are used for fixing oil cylinder are arranged on operating platform, wherein two pedestals are used for fixing anchor bar anchor cable rig part, a pedestal is used for fixing temporary lining and the broken petrosa branch of rake rock, the pedestal that described temporary lining and the broken petrosa of rake rock divide is in the centre of operating platform, and the pedestal of the anchor bar anchor cable rig of described two liftables and swing part is in the both sides of operating platform.
2, stone drifting according to claim 1 and supporting construction rig is characterized in that: described temporary lining and the broken petrosa branch (3) of rake rock comprise cantilever arm (301), cantilever arm oil cylinder (302), swing arm (303), boom cylinder (304), temporary support device (305), broken rock hammer device (306), rake rock screen device (307); Described cantilever arm and pedestal (6) are hinged with bearing pin, and the cantilever arm oil cylinder is loaded on cantilever arm below and the pedestal, and the centre of swing arm and cantilever arm are hinged with bearing pin, and boom cylinder is loaded on the top and cantilever arm of swing arm; Described temporary support device is loaded on the top of swing arm, and broken rock hammer device is loaded on the outside, lower end of swing arm, and rake rock screen device is loaded on the inboard, lower end of swing arm; Described temporary support device is by the claw-like trailing arm that is loaded on the swing arm top, and the pallet that is contained in end claw-like trailing arm is formed, described swing arm can drive temporary support device, broken rock hammer device, rake rock screen device, can swing under the oil cylinder of pedestal promotes by cantilever arm, being promoted down by the cantilever arm oil cylinder can oscilaltion, and by seesawing under the boom cylinder promotion.
3, stone drifting according to claim 1 and supporting construction rig is characterized in that: described anchor bar anchor cable rig part (4) comprises angle modulation oil cylinder (404), hoist cylinder (405), T-bar (406) and hydraulic drill rig steering mechanism (407) thereof in hydraulic drill rig (401), lifting arm (402), sleeve arm (403), the sleeve; The frame of described hydraulic drill rig one end of the hinged T-bar of bearing pin, lifting arm and sleeve arm are hinged on respectively on T-bar and the pedestal (6) with bearing pin, the piston of the angle modulation oil cylinder inner core of bearing pin hinged sleeve arm in the sleeve, the cylinder body of its angle modulation oil cylinder urceolus of bearing pin hinged sleeve arm, on the urceolus and pedestal (6) of hoist cylinder with bearing pin hinged sleeve arm, hydraulic drill rig steering mechanism is contained on the T-bar.
4, stone drifting according to claim 1 and supporting construction rig is characterized in that: described pedestal (6) comprises pedestal (601), rotor (602), rotating shaft (603), rotational fuel tank (604); Described pedestal is contained on the operating platform (5), and rotor is loaded in the pedestal by rotating shaft, and the cylinder body of rotational fuel tank is hinged on below the pedestal with bearing pin, and the piston of rotational fuel tank is hinged with bearing pin and rotor.
5, stone drifting according to claim 2 and supporting construction rig is characterized in that: described rake rock screen device (307) is made up of with rake rock tooth (3073) screen (3071), rake rock oil cylinder (3072); A plurality of rake rock teeth are housed on each screen, and screen is hinged on the inboard, lower end of swing arm, and rake rock oil cylinder is loaded on swing arm and the screen with bearing pin, and rake rock screen can seesaw under being promoted by rake rock oil cylinder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200770656U CN201225153Y (en) | 2008-04-22 | 2008-04-22 | Rock lane digging and supporting construction drill |
| PCT/CN2009/000147 WO2009129688A1 (en) | 2008-04-22 | 2009-02-10 | Rock drivage and supporting construction drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200770656U CN201225153Y (en) | 2008-04-22 | 2008-04-22 | Rock lane digging and supporting construction drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201225153Y true CN201225153Y (en) | 2009-04-22 |
Family
ID=40598038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200770656U Expired - Fee Related CN201225153Y (en) | 2008-04-22 | 2008-04-22 | Rock lane digging and supporting construction drill |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201225153Y (en) |
| WO (1) | WO2009129688A1 (en) |
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| US5205612A (en) * | 1990-05-17 | 1993-04-27 | Z C Mines Pty. Ltd. | Transport apparatus and method of forming same |
| CN1707066A (en) * | 2004-06-04 | 2005-12-14 | 王文凯 | Automatic whole-section external rotor low-speed motor cutting rotation drum anchor driving machine |
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| CN101302933B (en) * | 2008-06-25 | 2011-12-14 | 闫振东 | Method for developing rock lane comprehensive mechanization developing operation |
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