CN114233289B - Chain saw cutting device and coal seam gas permeability-increasing and pressure-releasing method - Google Patents
Chain saw cutting device and coal seam gas permeability-increasing and pressure-releasing method Download PDFInfo
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- CN114233289B CN114233289B CN202111586014.2A CN202111586014A CN114233289B CN 114233289 B CN114233289 B CN 114233289B CN 202111586014 A CN202111586014 A CN 202111586014A CN 114233289 B CN114233289 B CN 114233289B
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- 239000003245 coal Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000001360 synchronised effect Effects 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 241000446313 Lamella Species 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Sawing (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention belongs to the technical field of coal mine gas pressure relief, and particularly relates to a chain saw cutting device and a coal seam gas permeability-increasing and pressure relief method.
Description
Technical Field
The invention belongs to the technical field of coal mine gas pressure relief, and particularly relates to a chain saw cutting device and a coal seam gas permeability-increasing pressure relief method.
Background
The coal seam mined by the high gas and the protruding mine belongs to the low-permeability coal seam, the gas drainage difficulty is very high, and the drainage rate is low. In order to realize outburst elimination in the advanced region, the main technical methods of pressure relief and permeability improvement of the coal seam at the present stage comprise hydraulic fracturing, hydraulic slotting, high-pressure water jet punching, rope saw cutting and the like. The methods generally have the problems of unsatisfactory application effect, inconvenient operation, low slotting efficiency and the like.
Disclosure of Invention
In order to solve the technical problems, according to one aspect of the invention, the chain saw cutting device comprises a chain saw machine, a wireless remote controller, a walking trolley and a lifting stabilizing mechanism, wherein the chain saw machine comprises a chain saw main body and a guide plate, a chain with a cutter is arranged on a guide plate groove of the guide plate, an all-terrain crawler walking mechanism is arranged at the bottom of the walking trolley, a workbench is arranged at the top of the walking trolley, a vehicle-mounted electric cabinet and a mechanical arm with telescopic, rotary and swinging degrees of freedom are arranged on the workbench, the vehicle-mounted electric cabinet controls the start and stop of the chain saw machine, the movement of the all-terrain crawler walking mechanism, the lifting of the lifting stabilizing mechanism and the action of the mechanical arm through a PLC controller, and the wireless remote controller is in wireless communication connection with the vehicle-mounted electric cabinet and can send control instructions to the PLC controller;
the mechanical arm is provided with a mounting seat, the chain saw main body is fixed on the mounting seat, the guide plate comprises a driving part, a steering part and a transition part, the driving part is connected with the chain saw main body, the connecting structure of the chain saw main body and the chain is identical to that of the guide plate driving end in the prior art, the connecting structure of the steering part and the chain is identical to that of the guide plate steering end in the prior art, therefore, the mechanical arm is not repeated, the transition part is detachably connected between the driving part and the steering part, the transition part comprises a plurality of middle plates which can be mutually spliced, the structures and the sizes of the middle plates are identical, at least two through holes which correspond to each other in height are formed in the front side wall and the rear side wall of the middle plate, a plurality of chain sections are spliced through chain movable joints on the chain, the length of each chain section is matched with the length of the middle plate, the lifting stabilizing mechanism comprises two synchronous lifting cylinders arranged on the front side and the rear side of the chain saw main body, lifting plates are all provided with lifting plates, at least two through holes which correspond to the lifting rods on the middle plates, and the corresponding through holes on the middle plates are connected with the lifting rods, and the corresponding through holes on the lifting rods are arranged between the middle plates and the lifting rods and pass through the corresponding through holes.
Preferably, one end of the inserted link is provided with a baffle, and the outer diameter of the baffle is larger than the aperture of the through link hole, so that the inserted link is conveniently limited.
Preferably, the one end that the baffle was kept away from to the inserted bar is equipped with spacing hole, be equipped with spacing subassembly on the lifting plate, spacing subassembly includes spacing seat, spring and gag lever post, the spacing seat is fixed on the lifting plate and is set up in the upper end or the lower extreme of through-hole, the gag lever post slides and wears to establish in spacing seat, and the one end of gag lever post can insert in the spacing hole and carry out spacingly to the inserted bar, the other end of gag lever post is equipped with the hand wheel, the spring slides and wears to establish on the gag lever post, the both ends of spring respectively with hand wheel and spacing seat fixed connection, can be used to quick joint inserted bar, improve the security and the stability of device.
Preferably, grooves are formed in the front side and the rear side of the middle plate respectively, bolt holes are formed in the two ends of the grooves respectively, each two adjacent middle plates are connected through bolts respectively, grooves are formed in the front side and the rear side of the connecting end of the driving part, the steering part and the middle plate respectively, the top ends of the grooves in the driving part and the bottom ends of the grooves in the steering part are connected with the end portions of the grooves of the middle plate at the corresponding ends through bolts respectively, and therefore the length of the guide plate can be adjusted efficiently.
Preferably, the width of the cutter is more than or equal to 10mm, and a seam gap larger than 10mm can be cut at one time, so that the working efficiency is improved.
The undefined devices and components in the invention all adopt conventional technical means in the art, such as a mechanical arm, a chain saw main body, an all-terrain crawler running mechanism, a synchronous lifting oil cylinder, a vehicle-mounted electric cabinet, a wireless remote controller, a chain movable joint and the like, and the type and the mounting mode of the corresponding devices and components can be selected according to actual use requirements by a person skilled in the art, so that the specific mounting and control of the devices and components are clearly known and are not described in detail herein.
According to the invention, the guide plate adopts a multi-section spliced structure, so that the length of the guide plate is convenient to efficiently adjust, a plurality of chain sections are spliced on the chain through the chain movable joint, the length of the chain is also convenient to efficiently adjust, the guide plate can flexibly move and operate underground by virtue of the travelling trolley and the mechanical arm structure, the stability of the oil sawing machine during operation can be ensured by the lifting and stabilizing mechanism, the guide plate structure at the upper end of the driving part can be temporarily lifted when the kerf is deeper, and a new middle plate is conveniently added in the guide plate, so that the efficient operation of deeper kerf can be realized.
In another aspect of the present invention, a method for permeability and pressure relief of coal seam gas is provided, which adopts the chain saw cutting device to perform permeability and pressure relief on the coal seam gas, and specifically includes the following steps:
s1, determining a seam cutting position of a coal seam according to a coal seam structure;
s2, driving the travelling trolley to a preset seam cutting position through a wireless remote controller, and controlling the mechanical arm and the chain saw to crush and cut coal bodies above the pressure relief area;
s3, after the chain saw machine stops working, respectively disassembling a chain movable joint at two ends of a guide plate, respectively fixing four chain heads at corresponding guide plate positions through four U-shaped clamps, then disassembling lower end bolts of an intermediate plate connected with a driving part, controlling a synchronous lifting oil cylinder to move upwards by one intermediate plate, connecting a newly added intermediate plate between the driving plate and the upwards moved intermediate plate, respectively taking two chain sections to be connected between two corresponding chain heads at two sides of the guide plate, then taking out an inserted link from the upwards moved intermediate plate, resetting the synchronous lifting oil cylinder, then enabling the inserted link to pass through holes of the intermediate plate connected with the driving part, and respectively supporting two ends of the inserted link in through-link holes on lifting plates at two sides of the corresponding height;
s4, repeating the step S3 until the seam slotting is completed, so that a large number of new cracks are generated in the coal body.
Preferably, the U-shaped clamp comprises a U-shaped clamping groove and a fastening bolt which is in threaded connection with the side wall of the U-shaped clamping groove, the sum of the thickness of the chain and the thickness of the side wall of the groove of each part of the guide plate is matched with the groove width of the U-shaped clamping groove, the temporary fixation of the chain on the guide plate is conveniently realized, and the rapid access of a new chain section after the height adjustment of the guide plate is convenient.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has convenient operation, the lengths of the guide plate and the chain can be quickly adjusted according to the depth of the cutting seam, and the working stability is good.
2. The invention has the advantages of convenient operation, high slotting efficiency and good application effect in the coal seam gas permeability-increasing and pressure-releasing operation.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic view of the overall structure of the present invention in embodiment 1.
Fig. 2 is a schematic side view of the lift stabilizer mechanism of fig. 1.
Fig. 3 is an enlarged schematic view of the a portion structure in fig. 1.
Fig. 4 is an enlarged schematic view of the B-section structure in fig. 3.
Fig. 5 is a schematic view of the overall structure of the U-shaped jig in embodiment 2.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown, and in which embodiments of the invention are shown. All other embodiments, modifications, equivalents, improvements, etc., which are apparent to those skilled in the art without the benefit of this disclosure, are intended to be included within the scope of this invention.
Example 1
Referring to fig. 1 to 4, the chain saw cutting device provided by the invention comprises a chain saw machine, a wireless remote controller (not shown in the figure), a walking trolley and a lifting stabilizing mechanism, wherein the chain saw machine comprises a chain saw main body 1 and a guide plate, a guide plate groove (not shown in the figure) of the guide plate is provided with a chain 2 with a cutter, the bottom of the walking trolley is provided with an all-terrain crawler travelling mechanism 3, the top of the walking trolley is provided with a workbench 4, the workbench is provided with a vehicle-mounted electric control box 5 and a mechanical arm 6 with telescopic, rotary and swinging degrees of freedom, the vehicle-mounted electric control box controls the start and stop of the chain saw machine, the movement of the all-terrain crawler travelling mechanism and the lifting of the lifting stabilizing mechanism through a PLC (not shown in the figure), and the wireless remote controller is in wireless communication connection with the vehicle-mounted electric control box and can send control instructions to the PLC;
the mechanical arm is provided with the mounting seat 7, the chain saw main body is fixed on the mounting seat, the guide plate comprises a driving part 8, a steering part 9 and a transition part, the driving part is connected with the chain saw main body, the connecting structure of the chain saw main body and the chain is identical to that of the guide plate driving end in the prior art, the connecting structure of the steering part and the chain is identical to that of the guide plate steering end in the prior art, therefore, the transition part is not repeated, the transition part is detachably connected between the driving part and the steering part, the transition part comprises a plurality of middle plates 10 which can be mutually spliced, the structures and the sizes of the middle plates are identical, at least two through holes 11 which correspond to each other in height are formed in the front side wall and the rear side wall of the middle plates, a plurality of chain sections are spliced through chain movable joints, the length of each chain section is matched with the length of the middle plate, the lifting stabilizing mechanism comprises two synchronous lifting cylinders 12 arranged on the front side and the rear side of the chain main body, each synchronous lifting cylinder is provided with a lifting plate 13, at least two lifting rods are arranged on the synchronous lifting cylinders, and the corresponding through holes 14 are arranged on the middle plates and pass through the corresponding lifting rods 15.
One end of the inserted link is provided with a baffle 16, and the outer diameter of the baffle is larger than the aperture of the through link hole, so that the inserted link is conveniently limited. The utility model discloses a stop lever, including baffle, inserted bar, spring, limiting assembly, the one end that the baffle was kept away from to the inserted bar is equipped with spacing hole (not shown in the figure), be equipped with spacing subassembly on the lifting plate, spacing subassembly includes spacing seat 17, spring 18 and limiting rod 19, the spacing seat is fixed on the lifting plate and is set up in the upper end or the lower extreme of through-hole, the limiting rod slides and wears to establish in the spacing seat, and the one end of limiting rod can insert the spacing in the spacing hole and carry out spacingly to the inserted bar, the other end of limiting rod is equipped with hand wheel 20, the spring slides and wears to establish on the limiting rod, and the both ends of spring respectively with hand wheel and spacing seat fixed connection, can be used to quick joint inserted bar, improve the security and the stability of device. The front and back both sides of intermediate lamella are equipped with recess 21 respectively, the both ends of recess are equipped with the bolt hole respectively, and each is adjacent connect through bolt 22 respectively between the intermediate lamella, drive portion and turn to the portion and also be equipped with the recess with the front and back both sides of the link of intermediate lamella, and the top of recess on the drive portion and the bottom of recess on the portion of turning to pass through bolted connection with the tip of the recess of corresponding end intermediate lamella respectively, conveniently realize high-efficient adjustment to the length of baffle. The width of the cutter is more than or equal to 10mm, and a seam gap larger than 10mm can be cut at one time, so that the working efficiency is improved.
According to the invention, the guide plate adopts a multi-section spliced structure, so that the length of the guide plate is convenient to efficiently adjust, a plurality of chain sections are spliced on the chain through the chain movable joint, the length of the chain is also convenient to efficiently adjust, the guide plate can flexibly move and operate underground by virtue of the travelling trolley and the mechanical arm structure, the stability of the oil sawing machine during operation can be ensured by the lifting and stabilizing mechanism, the guide plate structure at the upper end of the driving part can be temporarily lifted when the kerf is deeper, and a new middle plate is conveniently added in the guide plate, so that the efficient operation of deeper kerf can be realized.
Example 2
Referring to fig. 1 to 5, the method for permeability and pressure relief of coal-bed gas provided by the invention is to adopt the chain saw cutting device in the embodiment to perform permeability and pressure relief on the coal-bed gas, and specifically comprises the following steps:
s1, determining a seam cutting position of a coal seam according to a coal seam structure;
s2, driving the travelling trolley to a preset seam cutting position through a wireless remote controller, and controlling the mechanical arm and the chain saw to crush and cut coal bodies above the pressure relief area;
s3, after the chain saw machine stops working, respectively disassembling a chain movable joint at two ends of a guide plate, respectively fixing four chain heads at corresponding guide plate positions through four U-shaped clamps, then disassembling lower end bolts of an intermediate plate connected with a driving part, controlling a synchronous lifting oil cylinder to move upwards by one intermediate plate, connecting a newly added intermediate plate between the driving plate and the upwards moved intermediate plate, respectively taking two chain sections to be connected between two corresponding chain heads at two sides of the guide plate, then taking out an inserted link from the upwards moved intermediate plate, resetting the synchronous lifting oil cylinder, then enabling the inserted link to pass through holes of the intermediate plate connected with the driving part, and respectively supporting two ends of the inserted link in through-link holes on lifting plates at two sides of the corresponding height;
s4, repeating the step S3 until the seam slotting is completed, so that a large number of new cracks are generated in the coal body.
Specifically, the U-shaped clamp comprises a U-shaped clamping groove 23 and a fastening bolt 24 which is in threaded connection with the side wall of the U-shaped clamping groove, the sum of the thickness of the chain and the thickness of the side wall of the groove of each part of the guide plate is matched with the groove width of the U-shaped clamping groove, the temporary fixing of the chain on the guide plate is conveniently realized, and the quick access of a new chain section after the height adjustment of the guide plate is convenient.
The embodiments of the present invention have been described above, the description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (7)
1. Chain saw cutting device, including the chain saw machine, the chain saw machine includes chain saw main part and baffle, be provided with the chain of taking the cutter on the baffle groove of baffle, its characterized in that: the device also comprises a wireless remote controller, a walking trolley and a lifting stabilizing mechanism, wherein the bottom of the walking trolley is provided with an all-terrain crawler walking mechanism, the top of the walking trolley is provided with a workbench, the workbench is provided with a vehicle-mounted electric cabinet and a mechanical arm with telescopic, rotary and swinging degrees of freedom, the vehicle-mounted electric control box controls the start and stop of the oil saw machine, the movement of the all-terrain crawler travelling mechanism, the lifting of the lifting stabilizing mechanism and the action of the mechanical arm through the PLC controller, and the wireless remote controller is in wireless communication connection with the vehicle-mounted electric control box and can send a control instruction to the PLC controller;
the mechanical arm is provided with a mounting seat, the chain saw main body is fixed on the mounting seat, the guide plate comprises a driving part, a steering part and a transition part, the driving part is connected with the chain saw main body, the transition part is detachably connected between the driving part and the steering part, the transition part comprises a plurality of middle plates which can be mutually spliced, the structure and the size of each middle plate are the same, the front side wall and the rear side wall of each middle plate are at least provided with two through holes with corresponding heights, the chain is spliced with a plurality of chain sections through a chain movable joint, the length of each chain section is matched with the length of the middle plate, the lifting stabilizing mechanism comprises two synchronous lifting oil cylinders arranged on the front side and the rear side of the chain saw main body, each synchronous lifting oil cylinder is provided with a lifting plate, at least two through rod holes corresponding to the through holes on the middle plate are movably arranged on the lifting plates, the inserted rods movably penetrate through the through holes on the middle plate connected with the driving part, and the lifting stroke of the lifting oil cylinders is matched with the lifting stroke of the middle plate.
2. The chainsaw cutting apparatus as defined in claim 1, wherein: one end of the inserted link is provided with a baffle, and the outer diameter of the baffle is larger than the aperture of the through link hole.
3. The chainsaw cutting apparatus as defined in claim 2, wherein: the utility model discloses a stop lever, including baffle, inserted bar, spring, limiting component, the one end that the baffle was kept away from to the inserted bar is equipped with the spacing hole, be equipped with spacing subassembly on the lifting plate, spacing subassembly includes spacing seat, spring and gag lever post, the spacing seat is fixed on the lifting plate and is set up in the upper end or the lower extreme of through-hole, the gag lever post slides and wears to establish in the spacing seat, and the one end of gag lever post can insert in the spacing hole and carry out spacingly to the inserted bar, the other end of gag lever post is equipped with the hand wheel, the spring slides and wears to establish on the gag lever post, the both ends of spring respectively with hand wheel and spacing seat fixed connection.
4. The chainsaw cutting apparatus as defined in claim 1, wherein: the front side and the rear side of the middle plate are respectively provided with a groove, two ends of the grooves are respectively provided with bolt holes, each two adjacent middle plates are respectively connected through bolts, the front side and the rear side of the connecting end of the driving part, the steering part and the middle plate are also provided with grooves, and the top end of the groove on the driving part and the bottom end of the groove on the steering part are respectively connected with the end parts of the grooves of the middle plate at the corresponding ends through bolts.
5. The chainsaw cutting apparatus as defined in claim 1, wherein: the width of the cutter is more than or equal to 10mm.
6. The coal bed gas permeability-increasing and pressure-releasing method is characterized in that: the method for enhancing permeability and relieving pressure of coal seam gas by adopting the chain saw cutting device as claimed in any one of claims 1 to 5, specifically comprising the following steps:
s1, determining a seam cutting position of a coal seam according to a coal seam structure;
s2, driving the travelling trolley to a preset seam cutting position through a wireless remote controller, and controlling the mechanical arm and the chain saw to crush and cut coal bodies above the pressure relief area;
s3, after the chain saw machine stops working, respectively disassembling a chain movable joint at two ends of a guide plate, respectively fixing four chain heads at corresponding guide plate positions through four U-shaped clamps, then disassembling lower end bolts of an intermediate plate connected with a driving part, controlling a synchronous lifting oil cylinder to move upwards by one intermediate plate, connecting a newly added intermediate plate between the driving plate and the upwards moved intermediate plate, respectively taking two chain sections to be connected between two corresponding chain heads at two sides of the guide plate, then taking out an inserted link from the upwards moved intermediate plate, resetting the synchronous lifting oil cylinder, then enabling the inserted link to pass through holes of the intermediate plate connected with the driving part, and respectively supporting two ends of the inserted link in through-link holes on lifting plates at two sides of the corresponding height;
s4, repeating the step S3 until the seam slotting is completed, so that a large number of new cracks are generated in the coal body.
7. The method for increasing permeability and pressure relief of coal seam gas according to claim 6, wherein the U-shaped clamp comprises a U-shaped clamping groove and a fastening bolt in threaded connection with the side wall of the U-shaped clamping groove, and the sum of the thickness of the chain and the thickness of the side wall of the groove of each part of the guide plate is matched with the groove width of the U-shaped clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111586014.2A CN114233289B (en) | 2021-12-21 | 2021-12-21 | Chain saw cutting device and coal seam gas permeability-increasing and pressure-releasing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111586014.2A CN114233289B (en) | 2021-12-21 | 2021-12-21 | Chain saw cutting device and coal seam gas permeability-increasing and pressure-releasing method |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE454149B (en) * | 1986-09-02 | 1988-04-11 | Bror Erik Osterman | CHAIN CASE TO SAVE IN VERY HARD MATERIAL, LIKE CONCRETE |
| CN201411730Y (en) * | 2009-05-21 | 2010-02-24 | 河南省农业科学院 | Soil cutting device |
| CN103470265B (en) * | 2013-09-10 | 2017-03-22 | 马爱民 | Self-propelled coal sawing machine for longitudinally cutting coal bed into block coal and cutting method for cutting coal bed by using machine |
| CN103924971A (en) * | 2014-05-05 | 2014-07-16 | 湖南科技大学 | Chain coal cutter |
| CN108131140B (en) * | 2014-08-09 | 2020-06-16 | 烟台小米机械技术有限公司 | Cantilever type longitudinal shaft digging and anchoring machine with remote control function |
| CN212634532U (en) * | 2020-05-09 | 2021-03-02 | 广东海狮达科技有限公司 | Lithium battery electric chain saw |
| CN212337286U (en) * | 2020-07-07 | 2021-01-12 | 上海中筑实业有限公司 | Mine chain arm saw for joint cutting at top of underground roadway of mine |
| CN112145223A (en) * | 2020-09-10 | 2020-12-29 | 李章明 | Rope saw cutting device and coal bed gas permeability increasing and pressure relieving method |
| CN113530538A (en) * | 2021-07-30 | 2021-10-22 | 平顶山市安泰华矿用安全设备制造有限公司 | Circulation tunnelling formula coal seam cutting integration equipment |
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