CN101839138B - Development machine - Google Patents
Development machine Download PDFInfo
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- CN101839138B CN101839138B CN2010101562525A CN201010156252A CN101839138B CN 101839138 B CN101839138 B CN 101839138B CN 2010101562525 A CN2010101562525 A CN 2010101562525A CN 201010156252 A CN201010156252 A CN 201010156252A CN 101839138 B CN101839138 B CN 101839138B
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- development machine
- suspension device
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- drive unit
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Abstract
The invention discloses a development machine, comprising a development machine body (1) as well as a supporting device (2) and a driving device (3) for driving the supporting device (2) to move; wherein the supporting device (2) is arranged at the front part of the development machine body (1), and the supporting device (2) can be in supported position under the action of the driving device (3).The development machine provided by the invention can widen application range thereof while ensuring use cost to be low, and meanwhile the time required by supporting is reduced, the labor intensity of workers is reduced, and the work efficiency is improved.
Description
Technical field
The present invention relates to coal machine field, particularly relate to a kind of development machine.
Background technology
Along with the high speed development of Chinese national economy, energy consumption increases rapidly, and coal is as the main energy sources of China, and its consumption constantly increases, and the coal industry of China also obtains fast development, and the coal machine industry that is as close as lips and teeth with it also comes into one's own day by day.
Driving and back production are the important production links of Coal Production, and the speedy drivage of coal mine roadway is the key technology measure that the colliery guarantees mine stable high yield.Efficient mechanization driving and support technology are the necessary conditions that guarantees mine realization high-yield and high-efficiency, also are the developing direction of tunnelling technology.
In the prior art, mainly contain three kinds of driving support patterns:
One, adopts cantilevered coal mine tunneling machine driving; Adopt portable monomer jumbolter to carry out bolt support simultaneously, this is efficiently maximum a kind of of usage quantity in the driving mode of present various coal road, and it is relatively poor to be mainly used in the butt entry roof support strength; Strict to unsupported back span; Need behind driving, carry out the occasion of immediate support immediately, therefore, the applicability of this kind driving mode is better.
Yet aforesaid way adopts the monomer jumbolter to carry out bolt support, therefore; Need artificial frequent move operation roof-bolter to beat single bolthole and fastening anchor pole, non-cutting time is long, and it is many to take personnel; Labor strength is big, and supporting efficient is lower, adds the non-cutting time of other work; So that the working time of development machine can only account for wherein approximately about 30% in a driving, support work circulate the period, has caused drivage efficiency lower.
Two, adopt the continuous miner driving; Adopt vehicle-mounted multi-arm jumbolter to carry out bolt support simultaneously; Roof-bolter and continuous miner are respectively two work plane parallel operations; Behind continuous miner driving certain distance, be withdrawn into next bar tunnel operation, roof-bolter gets into the tunnel of firm digging immediately and carries out supporting.
Yet; Carry out supporting because this kind mode need make roof-bolter get into the tunnel after driving is accomplished again, this just requires the top plate supporting intensity of coal road in the working environment to get well, and the digging laneway section is big; At least need allow 6 meters to unsupported back span; Thereby limit the applying working condition of this kind mode, limited its scope of application, can only be in China in mining area and Erdos area uses such as Shen Dong, Wan Li.
Three, adopt import pick anchoring integral unit to carry out the driving and the supporting of coal road; Though this mode can be carried out immediate support to the butt entry roof behind the driving, still, receives its effect on structure; Its appearance and size is bigger; This bearing capacity with regard to the top board of working environment and floor is bigger, and the digging laneway section is bigger simultaneously, thereby has also limited the scope of application of this kind machinery; Simultaneously, this equipment price is expensive, and use cost is very high.
Therefore, how on the basis that guarantees lower use cost, enlarge the scope of application of development machine; Shorten the needed time of supporting simultaneously; Reduce staff's labour intensity, increase work efficiency, just become the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of development machine, this development machine can guarantee on the basis of lower use cost, enlarges the scope of application of development machine, shortens the needed time of supporting simultaneously, reduces staff's labour intensity, increases work efficiency.
For solving the problems of the technologies described above; The present invention provides a kind of development machine; Comprise the development machine body; Also comprise suspension device and drive the drive unit that said suspension device moves, said suspension device is installed on the front portion of said development machine body, and said suspension device can be in the supporting position under the effect of said drive unit; Said drive unit comprises driver and the slideway that is arranged at said development machine body side; And be arranged at the slide block in the said slideway; The front end of said slide block is connected with the support body of said suspension device, and said driver acts on said slide block, drives said suspension device and moves along said slideway.
Preferably; Also comprise the portal frame and second drive unit; Said portal frame is across the front portion of said development machine body; The parallel axes of said second drive unit is in the bearing of trend of said portal frame, and said suspension device is installed at least one side in the left and right sides of said portal frame, and can under the effect of said second drive unit, laterally move.
Preferably, further comprise the first rotary power parts that are arranged at said portal frame, the said first rotary power parts can drive said suspension device and in the perpendicular that is parallel to plane, portal frame length direction place, rotate.
Preferably, also comprise the link that connects said portal frame and said drive unit.
Preferably, said link comprises connecting rod, and first end of said connecting rod is connected with the support body of said portal frame or said suspension device, and its second end is connected with said development machine body, and said drive unit acts on the middle part of said connecting rod.
Preferably, also comprise the 3rd drive unit, an end of said the 3rd drive unit is connected in the middle part of said connecting rod, and the other end is connected in said portal frame or said support body.
Preferably, said connecting rod comprises the first bar section and the second bar section, and the angle between the two is the obtuse angle.
Preferably, said link comprises the transverse strands that laterally arranges with said portal frame, and vertical frame of hinged said portal frame and said transverse strands, is provided with four-drive device between said portal frame and the said vertical frame.
Preferably, also comprise temporary support device, said temporary support device is installed on the support body of said portal frame or said suspension device.
Preferably, said temporary support device comprises the following temporary support device and the last temporary support device that is used to support back that is used to support roadway floor.
Preferably, also comprise the second rotary power parts, said suspension device and said portal frame articulate through the pivot that vertically is provided with, and under the effect of the said second rotary power parts, said suspension device rotates around said pivot.
Preferably, the power source of said development machine body and the power source of said suspension device are same power source, and realize to development machine body or said suspension device power being provided through transfer valve.
Development machine provided by the present invention comprises the drive unit that development machine body, suspension device and driving suspension device move, and suspension device is installed on the front portion of development machine body, and suspension device can be in the supporting position under the effect of drive unit.It is thus clear that; Because development machine provided by the present invention has added suspension device in the front portion of its development machine body, thereby make through the top board after the cutting of development machine body after exposing; Just can obtain supporting in time at once; Shortened the length and the empty top time on empty top greatly, effectively avoided exposed top board to cross the generation that the amount of crushing that does not obtain effective support for a long time and cause is excessive, phenomenons such as abscission layer destroy occur, guaranteed control effect big section coal road country rock; Reduced of the requirement of driving mode, enlarged the scope of application of development machine for working environment; Simultaneously; Because development machine provided by the present invention has possessed the function of driving and supporting simultaneously, can carry out the supporting of mechanization, thereby greatly reduce labor strength; And improved support speed greatly; Shorten support time, reduced production non-cutting time, and then improved the whole driving speed in tunnel; On the other hand; Because development machine provided by the present invention only is on former development machine body, to have added suspension device; Structural change is less; Whole physical dimension is less, thereby has reduced the requirement of development machine for the top board in the working environment and base plate and digging laneway area, has further enlarged the scope of application.
In a kind of preferred implementation; Development machine provided by the present invention also comprises the portal frame and second drive unit; Portal frame is across the front portion of development machine body; The parallel axes of second drive unit is in the bearing of trend of portal frame, and suspension device is installed at least one side in the left and right sides of portal frame, and can under the effect of second drive unit, laterally move.Like this, two suspension devices can be set not only,, thereby improve supporting efficient and supporting effect, but also can under the effect of second drive unit,, enlarge the supporting scope along the horizontal spreading of development machine so that the two carries out support work simultaneously.
In another kind of preferred implementation, development machine provided by the present invention further comprises the first rotary power parts that are arranged at portal frame, rotates in the perpendicular that is parallel to plane, portal frame length direction place to drive suspension device.Like this, suspension device provided by the present invention just can rotate to horizontal level, and the lateral wall in tunnel is carried out supporting; Can also rotate to obliquity; Lateral wall drift angle to the tunnel carries out supporting, thereby has further improved supporting scope and supporting effect, has improved the safety in the tunneling process.
Description of drawings
The perspective view of the development machine that Fig. 1 is provided for a kind of specific embodiment of the present invention;
Fig. 2 is the side-looking structural representation of development machine shown in Figure 1;
Fig. 3 is the partial structurtes sketch map of development machine shown in Figure 1;
Fig. 4 is the structural representation of second kind of development machine that the specific embodiment provided of the present invention;
Fig. 5 is in the structural representation of supporting position for development machine shown in Figure 4.
The specific embodiment
Core of the present invention provides a kind of development machine, and this development machine can guarantee on the basis of lower use cost, enlarges the scope of application of development machine, shortens the needed time of supporting simultaneously, reduces staff's labour intensity, increases work efficiency.
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with the accompanying drawing and the specific embodiment.
Please refer to Fig. 1 to Fig. 3, the perspective view of the development machine that Fig. 1 is provided for a kind of specific embodiment of the present invention; Fig. 2 is the side-looking structural representation of development machine shown in Figure 1; Fig. 3 is the partial structurtes sketch map of development machine shown in Figure 1.
In a kind of specific embodiment; Development machine provided by the present invention; Comprise development machine body 1, suspension device 2 and drive the drive unit 3 that suspension device 2 moves, suspension device 2 is installed on the front portion of development machine body 1, and suspension device 2 can be in the supporting position under the effect of drive unit 3.
Particularly, supporting as herein described mainly comprises permanent support: promptly in the sidewall in tunnel, beat anchor pole, strengthen the enabling capabilities of sidewall itself; Correspondingly, suspension device 2 as herein described specifically also is the permanent support device, such as: shown in figure; Suspension device 2 can be the hydraulic pressure drill boom; The function of hydraulic pressure drill boom is good, beats the rapid speed of anchor pole, has guaranteed that development machine tunnels with fast speeds; On the other hand, the front portion of development machine body 1 as herein described is meant the front portion of development machine body 1 itself, is a part that belongs to development machine body 1.
Like this, because development machine provided by the present invention has added suspension device 2 in the front portion of its development machine body 1; Make development machine possess the function of driving and supporting simultaneously; Thereby make through the top board after 1 cutting of development machine body after exposing, just can obtain supporting in time at once, shortened the length and the empty top time on empty top greatly; Effectively avoided exposed top board to cross the generation that the amount of crushing that does not obtain effective support for a long time and cause is excessive, phenomenons such as abscission layer destroy occur; Guaranteed control effect, reduced of the requirement of driving mode, enlarged the scope of application of development machine for working environment to big section coal road country rock; Simultaneously; Because development machine provided by the present invention has possessed the function of driving and supporting simultaneously, can carry out the supporting of mechanization, thereby greatly reduce labor strength; And improved support speed greatly; Shorten support time, reduced production non-cutting time, and then improved the whole driving speed in tunnel; On the other hand; Because development machine provided by the present invention only is on former development machine body 1, to have added suspension device 2; Structural change is less; Whole physical dimension is less, thereby has reduced the requirement of development machine for the top board in the working environment and base plate and digging laneway area, has further enlarged the scope of application.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of second kind of development machine that the specific embodiment provided of the present invention; Fig. 5 is in the structural representation of supporting position for development machine shown in Figure 4.
In a kind of specific embodiment; Drive unit 3 can comprise driver 32 and the slideway 31 that is arranged at development machine body 1 side; And be arranged at the slide block 33 in the slideway 31; The front end of slide block 33 is connected with the support body of suspension device 2, and driver 32 acts on slide block 33, drives suspension device 2 and moves along slideway 31.
In the course of work, the active force of driver 32 is passed to suspension device 2 through slide block, makes suspension device 2 get into the operating position as required, and the work plane in tunnel is carried out supporting.
Being provided with of slide block 33 and slideway 31 made things convenient for each layout of installing of development machine, and the interaction of slide block 33 and slideway 31 has simultaneously guaranteed the stability of suspension device 2.
Particularly; Extremely shown in Figure 5 like Fig. 1; Development machine provided by the present invention can also comprise the portal frame 5 and second drive unit, and portal frame 5 is across the front portion of development machine body 1, and the parallel axes of second drive unit is in the bearing of trend of portal frame 5; Suspension device 2 is installed at least one side in the left and right sides of portal frame 5, and can under the effect of second drive unit, laterally move.
Like this, two suspension devices 2 can be set not only, so that the two carries out support work simultaneously; Further improve the supporting efficient and the supporting effect of development machine; And suspension device 2 can also along the horizontal spreading of development machine, carry out supporting in laterally bigger scope under the effect of second drive unit; Enlarge the supporting scope, thereby enlarged the scope of application to a certain extent.
Generally; The work plane in tunnel is except the top board and the base plate in tunnel; The lateral wall that also comprises the tunnel for guaranteeing the safety in the course of work, not only need increase the intensity of back and base plate; And needs strengthen the support strength of the lateral wall in tunnel; Therefore development machine provided by the present invention comprises further that also the output shaft of the first rotary power parts, 7, the first rotary power parts 7 that are arranged at portal frame 5 is connected with the support body of said suspension device 2, rotates in the perpendicular that is parallel to plane, portal frame length direction place to drive suspension device 2.
Like this, suspension device 2 provided by the present invention just can rotate to horizontal level, and the lateral wall in tunnel is carried out supporting; Can also rotate to obliquity; Lateral wall drift angle to the tunnel carries out supporting, thereby has further improved supporting scope and supporting effect, has improved the safety in the tunneling process.
Certainly power set act on portal frame 5 for ease, can also link be set at portal frame 5 and drive unit 3.
Particularly, to shown in Figure 3, link can comprise connecting rod 4 like Fig. 1, and first end of connecting rod 4 is connected with the support body of portal frame 5 or suspension device 2, and second end of connecting rod 4 is connected with development machine body 1, and drive unit 3 acts on the middle part of connecting rod 4.
Like this; When 4 motions of drive unit 3 drivening rods; It perhaps only is that suspension device 2 rotates around the tie point of connecting rod 4 with development machine body 1 with portal frame 5 that connecting rod 4 drives coupled suspension device 2, gets into supporting position or non-supporting position, when being in non-supporting position; Suspension device 2 " folds " in the top of development machine body 1, has reduced suspension device 2 and portal frame 5 and has been in shared space under the non-supporting state.
Certainly, connecting rod 4 can also comprise the first bar section 41 and the second bar section 42, and the angle between the two is the obtuse angle.Like this; Just can be through angle and the link position of drive unit 3 between the first bar section 41 and the second bar section 42 suitably is set, make suspension device 2 when non-supporting state, be positioned on the development machine body 1; Bear its weight by it; Reduce the active force of 2 pairs of links of suspension device, simultaneously, can also reduce suspension device 2 and portal frame 5 to greatest extent and be in shared space under the non-supporting state.
In order to guarantee the stability of suspension device 2 when being in the operating position, the end that the 3rd drive unit 6, the three drive units 6 can also be set is connected in the middle part of connecting rod 4, and the other end is connected in portal frame 5 or support body.Certainly; Those skilled in the art understand that naturally the 3rd drive unit 6 and the tie point of portal frame 5 or support body should be different from the tie point of connecting rod 4 and portal frame 5 or support body; Like this; When the 3rd drive unit 6 was in a certain stationary state, one in portal frame 5 and the support body, connecting rod 4, the 3rd drive unit 6 threes had constituted triangular structure, thereby have guaranteed the stability of suspension device 2; Simultaneously, the 3rd drive unit 63 can also drive suspension device 2 certain angle that turns forward as required, realizes that advance support (making anchor) perhaps punches in rib, with water in the detection of coal seam and gas etc.
In the another kind of specific embodiment; Like Fig. 4 and shown in Figure 5; Link can also comprise the transverse strands 43 that laterally arranges with portal frame 5, and vertical frame 44 of hinged portal frame 5 and transverse strands 43, is provided with four-drive device 9 between portal frame 5 and the transverse strands 43.The setting of transverse strands, vertical frame and four-drive device 9 has also reduced suspension device 2 and portal frame 5 is being in shared space under the non-supporting state.
Except permanent support; Development machine provided by the present invention can also comprise temporary support device 8; Temporary support device 8 can be installed on the support body of portal frame 5 or suspension device 2; To guarantee preventing in beating the anchor process, the to cause danger safety of the assurance course of work beating the preceding supporting intensity of anchor (being permanent support).Certainly, above-mentioned temporary support device 8 can be specially oil cylinder.
Particularly, temporary support device 8 can comprise the following temporary support device and the last temporary support device that is used to support back that is used to support roadway floor, thereby when temporary lining, improves supporting effect.
In order as soon as possible second-rate top board to be carried out supporting; Guarantee supporting process safe property simultaneously; Development machine provided by the present invention can also comprise the second rotary power parts; Suspension device 2 articulates through the pivot that vertically is provided with portal frame 5, and under the effect of the second rotary power parts, suspension device 2 rotates around pivot; Thereby when needs on suspension device 2 during skyhook; The anchor pole installation position of suspension device 2 is rotated to from cut surface position far away; To guarantee safety; When anchor is made in installation, again the anchor pole installation position is rotated to the position nearer apart from cut surface, incipient empty jacking row is played the anchor supporting.
In order to reduce cost; Reduce number of components and parts; The power source that can development machine body 1 and the power source of suspension device 2 are set to same power source; Simultaneously interference-free in order to guarantee the two course of work, transfer valve can be set, to realize to development machine body 1 or suspension device 2 power being provided respectively in pipeline.
More than development machine provided by the present invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (12)
1. development machine; Comprise development machine body (1); It is characterized in that; Also comprise suspension device (2) and drive the drive unit (3) that said suspension device (2) moves, said suspension device (2) is installed on the front portion of said development machine body (1), and said suspension device (2) can be in the supporting position under the effect of said drive unit (3); Said drive unit (3) comprises driver (32) and is arranged at the slideway (31) of said development machine body (1) side; And be arranged at the slide block (33) in the said slideway (31); The front end of said slide block (33) is connected with the support body of said suspension device (2); Said driver (32) acts on said slide block (33), drives said suspension device (2) and moves along said slideway (31).
2. development machine according to claim 1; It is characterized in that; Also comprise the portal frame (5) and second drive unit, said portal frame (5) is across the front portion of said development machine body (1), and the parallel axes of said second drive unit is in the bearing of trend of said portal frame (5); Said suspension device (2) is installed at least one side in the left and right sides of said portal frame (5), and can under the effect of said second drive unit, laterally move.
3. development machine according to claim 2; It is characterized in that; Further comprise the first rotary power parts (7) that are arranged at said support body, the said first rotary power parts (7) can drive said suspension device (2) and in the perpendicular that is parallel to plane, portal frame length direction place, rotate.
4. development machine according to claim 2 is characterized in that, also comprises the link that connects said portal frame (5) and said drive unit (2).
5. development machine according to claim 4; It is characterized in that; Said link comprises connecting rod (4); First end of said connecting rod (4) is connected with the support body of said portal frame (5) or said suspension device (2), and its second end is connected with said development machine body (1), and said drive unit (3) acts on the middle part of said connecting rod.
6. development machine according to claim 5 is characterized in that, also comprises the 3rd drive unit (6), and an end of said the 3rd drive unit (6) is connected in the middle part of said connecting rod (4), and the other end is connected in said portal frame (5) or said support body.
7. development machine according to claim 5 is characterized in that, said connecting rod comprises the first bar section (41) and the second bar section (42), and the angle between the two is the obtuse angle.
8. development machine according to claim 4; It is characterized in that; Said link comprises the transverse strands (43) that laterally arranges with said portal frame (5); And vertical frame (44) of hinged said portal frame (5) and said transverse strands (43), be provided with four-drive device (9) between said portal frame (5) and the said transverse strands (43).
9. development machine according to claim 2 is characterized in that, also comprises temporary support device (8), and said temporary support device (8) is installed on the support body of said portal frame (5) or said suspension device (2).
10. development machine according to claim 9 is characterized in that, said temporary support device (8) comprises the following temporary support device and the last temporary support device that is used to support back that is used to support roadway floor.
11. development machine according to claim 2; It is characterized in that; Also comprise the second rotary power parts; Said suspension device (2) articulates through the pivot that vertically is provided with said portal frame (5), and under the effect of the said second rotary power parts, said suspension device (2) rotates around said pivot.
12. development machine according to claim 2; It is characterized in that; The power source of the power source of said development machine body (1) and said suspension device (2) is same power source, and realizes to development machine body (1) or said suspension device (2) power being provided through transfer valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101562525A CN101839138B (en) | 2010-04-27 | 2010-04-27 | Development machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101562525A CN101839138B (en) | 2010-04-27 | 2010-04-27 | Development machine |
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| Publication Number | Publication Date |
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| CN101839138A CN101839138A (en) | 2010-09-22 |
| CN101839138B true CN101839138B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101562525A Expired - Fee Related CN101839138B (en) | 2010-04-27 | 2010-04-27 | Development machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817610B (en) * | 2012-08-22 | 2014-12-03 | 中传重型装备有限公司 | Tunneling, anchoring and supporting integrated machine |
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| CN2844391Y (en) * | 2005-12-13 | 2006-12-06 | 北京七杰伟业科技发展有限公司 | The airborne roof-bolter of colliery speedy drivage machine |
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| CN200989207Y (en) * | 2006-05-11 | 2007-12-12 | 石家庄煤矿机械有限责任公司 | Tunneller random protection system |
| CN201193525Y (en) * | 2008-04-26 | 2009-02-11 | 山东兖煤精益机电设备有限公司 | Vehicle-mounted temporary support device for development machine |
| CN101634224A (en) * | 2009-05-26 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Heading machine provided with cantilever type front canopy supporting protection device |
| CN201679503U (en) * | 2010-04-27 | 2010-12-22 | 芬雷选煤工程技术(北京)有限公司 | Heading machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125085A (en) * | 1997-10-22 | 1999-05-11 | Yamashita Kanagata:Kk | Auger support device for mobile digging machine |
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2010
- 2010-04-27 CN CN2010101562525A patent/CN101839138B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2138646C1 (en) * | 1993-08-27 | 1999-09-27 | ДБТ Дойче Бергбау Техник ГмбХ | Method and device for stoping in underground mine openings |
| CN2844391Y (en) * | 2005-12-13 | 2006-12-06 | 北京七杰伟业科技发展有限公司 | The airborne roof-bolter of colliery speedy drivage machine |
| CN200989207Y (en) * | 2006-05-11 | 2007-12-12 | 石家庄煤矿机械有限责任公司 | Tunneller random protection system |
| CN1904311A (en) * | 2006-05-23 | 2007-01-31 | 山西潞安矿业(集团)有限责任公司 | Entry-driving machine front complement and hydraulic anchor rad drilling arm system |
| CN201193525Y (en) * | 2008-04-26 | 2009-02-11 | 山东兖煤精益机电设备有限公司 | Vehicle-mounted temporary support device for development machine |
| CN101634224A (en) * | 2009-05-26 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Heading machine provided with cantilever type front canopy supporting protection device |
| CN201679503U (en) * | 2010-04-27 | 2010-12-22 | 芬雷选煤工程技术(北京)有限公司 | Heading machine |
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