CN109779678A - Perforating machine for this coal bed gas extraction - Google Patents
Perforating machine for this coal bed gas extraction Download PDFInfo
- Publication number
- CN109779678A CN109779678A CN201910199393.6A CN201910199393A CN109779678A CN 109779678 A CN109779678 A CN 109779678A CN 201910199393 A CN201910199393 A CN 201910199393A CN 109779678 A CN109779678 A CN 109779678A
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- Prior art keywords
- cutterhead
- main box
- cutting
- drilling rod
- connect
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Links
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000000605 extraction Methods 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 55
- 238000005183 dynamical system Methods 0.000 claims abstract description 19
- 239000010720 hydraulic oil Substances 0.000 claims description 26
- 239000003921 oil Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000004047 hole gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Abstract
The present invention is used for the perforating machine of this coal bed gas extraction, and in particular to a kind of perforating machine for gas drainage；Technical problem to be solved is to provide a kind of perforating machine of coal seam cutting of the width more than or equal to 1m, highly more than or equal to 0.3m that can construct；The technical solution of use are as follows: include: main box, cutting cutterhead, dynamical system, guiding connector and propulsion system, the cuboid that the main box is and slot cross sectional shape is adapted, cutting cutterhead is located in front of main box, it is connect by cutterhead bracket with main box, and connect with the dynamical system of its rotation is driven, cutterhead bracket front end is connect by being oriented to connector with guide hole drilling rod；The cutting cutterhead is oblate cylindricality cutterhead, is densely covered with pick on periphery；The propulsion system includes horizontal drill and promotes drilling rod, and horizontal drill is located at main box rear, promotes drilling rod one end to connect with horizontal drill, the other end is connect with main box；The present invention is used for this coal bed gas extraction slot.
Description
Technical field
The present invention is used for the perforating machine of this coal bed gas extraction, belongs to mining equipment technical field, and in particular to Yi Zhongyong
In the perforating machine of gas drainage.
Background technique
Currently, the anti-reflection reinforcing gas drainage the relevant technologies of release mainly have intensive drilling gas extraction technology, hydraulic flushing in hole
Gas drainage technology, exploitation protective layer gas preventing and control technology, hydrofracturing coal bed gas extraction technology, hydraulic slotted liner technique gas drainage
Technology etc.；Intensive drilling gas extraction technology is widely used at present, since drilling construction quantity is more, there is investment greatly, watt
It is uncoordinated or uneven to often result in " pumping, excavation, mining " on adopting, digging influence greatly for this extraction；Hydraulic flushing in hole gas drainage technology pair
Coal body air penetrability effect very little is improved, is not used substantially；Exploit protective layer gas preventing and control technology and hydrofracturing coal-bed gas
The application effect of extraction technology is limited by condition of coal seam occurrence, and the application of the technology is strictly constrained；Hydraulic slotted liner technique gas is taken out
The technology of adopting is to be formed by that slot radius is small, slot height is low by high-pressure water jet slot, to constrain slot surrounding coal
The development, the formation in crack and the expansion of distressed zone of (rock) deformation, affect the application effect of the technology.It is greater than for width
It is strong still to can be realized this coal seam pressure relief and permeability improvement without mechanical slot equipment for coal seam cutting equal to 1m, highly more than or equal to 0.3m
Change gas drainage technology.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, and technical problem to be solved is to provide one kind to construct width
The perforating machine for this coal bed gas extraction of coal seam cutting more than or equal to 1m, highly more than or equal to 0.3m.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: the slot for this coal bed gas extraction
Machine, comprising: main box, cutting cutterhead, dynamical system, guiding connector and propulsion system, the main box are and slot section shape
The adaptable cuboid of shape, cutting cutterhead are located in front of main box, are connect by cutterhead bracket with main box, and revolve with its is driven
The dynamical system connection turned, cutterhead bracket front end are connect by being oriented to connector with guide hole drilling rod；
The cutting cutterhead is oblate cylindricality cutterhead, is densely covered with pick on periphery；
The propulsion system includes horizontal drill and promotes drilling rod, and horizontal drill is located at main box rear, promote drilling rod one end and
Horizontal drill connection, the other end are connect with main box.
Specifically, the main box further includes the support rod being fixed below its rectangular phosphor bodies, one end of support rod with
Propulsion drilling rod connection in the propulsion system, the other end are connect with one end of cutterhead bracket, and the other end of cutterhead bracket passes through
Guiding connector is connect with guide hole drilling rod, and cutting cutterhead is mounted on above cutterhead bracket；
The width of the support rod and cutterhead bracket is respectively less than the diameter of guide hole drilling rod；
The dynamical system includes the first motor, hydraulic oil container, hydraulic oil pump and hydraulic motor, the first motor, hydraulic oil
Case and hydraulic oil pump are installed in the main box, and hydraulic motor is mounted on the rotation of cutting cutterhead internal drive cutting cutterhead,
The output end of first motor and the input terminal of hydraulic oil pump connect, and the oil inlet of hydraulic oil pump is connected with hydraulic tank,
The oil outlet of hydraulic oil pump and the oil inlet of hydraulic motor connect, and the oil outlet of hydraulic motor is connected with hydraulic tank.
Further, sealing maintenance door is provided on the rear end face of the main box.
Specifically, the shape of the cutterhead bracket is the U-shaped that side is put, the upper and lower side of shaft is mounted on cutterhead in cutting cutterhead
On the upper and lower end face of bracket, the advanced cutterhead rotated with guide hole drilling rod is set on the guide hole drilling rod, the cutterhead bracket
Width and height are respectively less than the diameter of advanced cutterhead；
The dynamical system is the second motor, and the second motor is located at the rotation of cutting cutterhead internal drive cutting cutterhead.
Specifically, the cutting cutterhead is replaced with two cutting drums, two cutting drums are located at cutterhead bracket two sides, and
It is arranged perpendicular to slot direction, the dynamical system is third motor, and third motor is located in the main box, and passes through
Bevel gear set drives two cutting drum rotations；
The advanced cutterhead rotated with guide hole drilling rod is set on the guide hole drilling rod, the width and height of the cutterhead bracket are small
In the diameter of advanced cutterhead.
Further, sealing maintenance door is provided on the rear end face of the main box.
Further, circulation is had on the guide hole drilling rod.
The present invention has the advantages that compared with prior art.
1, the present invention can cutting go out width more than or equal to 1m, highly be more than or equal to 0.3m slot, cut relative to waterpower
Seam is the prior art of representative, development, the formation in crack and the expansion of distressed zone that slot effect, slot surrounding coal (rock) deform
It can significantly improve, better gas pumping effect will be obtained.
2, the present invention solves that great in constructing amount, employment is more, high pressure compared with the anti-reflection reinforcing gas drainage technology of other releases
The problems such as water system security hidden danger is big, low efficiency, realizes mechanization safely and fast slot.
3, the present invention uses self-powered cutting cutterhead, and sliding and cutting coal body, equipment knot are completed under the auxiliary of propulsion system
Structure is simple, reasonable, and easy to operate, operation is efficiently.
4, the guide hole drilling rod side in the present invention has circulation, the coal of cutting can be delivered to external lane along slot
Road solves the problems, such as slag output, and can cool down cutting cutterhead and dynamical system, improve cutting efficiency.
5, the present invention is connect by being oriented to connector with guide hole drilling rod, and the mating advanced cutterhead of installation if necessary, plays guiding
With the effect of reaming, and cooperate with main box, it is effective to ensure equipment even running.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structural schematic diagram of the embodiment of the present invention two.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the structural schematic diagram of the embodiment of the present invention three.
Fig. 6 is the top view of Fig. 5.
In figure: 1 is main box, and 11 be support rod, and 2 be cutting cutterhead, and 3 be dynamical system, and 31 be the first motor, and 32 are
Hydraulic oil container, 33 be hydraulic oil pump, and 34 be hydraulic motor, and 35 be the second motor, and 36 be third motor, and 4 be guiding connector,
5 be propulsion system, and 51 be horizontal drill, and 52 is promote drilling rod, and 6 be cutterhead bracket, and 7 be guide hole drilling rod, and 8 be advanced cutterhead, and 9 are
Cutting drum.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
Embodiment one
As shown in Figure 1 and Figure 2, the present invention is used for the perforating machine of this coal bed gas extraction, comprising: main box 1, moves cutting cutterhead 2
Force system 3, guiding connector 4 and propulsion system 5, the cuboid that the main box 1 is and slot cross sectional shape is adapted, cutting knife
Disk 2 is located at 1 front of main box, is connect by cutterhead bracket 6 with main box 1, and connect with the dynamical system 3 of its rotation is driven,
6 front end of cutterhead bracket is connect by being oriented to connector 4 with guide hole drilling rod 7；
The cutting cutterhead 2 is oblate cylindricality cutterhead, is densely covered with pick on periphery；
The propulsion system 5 includes horizontal drill 51 and promotes drilling rod 52, and horizontal drill 51 is located at 1 rear of main box, promotes and bores
52 one end of bar is connect with horizontal drill 51, and the other end is connect with main box 1.
Specifically, the main box 1 further includes the support rod 11 being fixed below its rectangular phosphor bodies, the one of support rod 11
End connect with the propulsion drilling rod 52 in the propulsion system 5, the other end is connect with one end of cutterhead bracket 6, cutterhead bracket 6 it is another
One end is connect by being oriented to connector 4 with guide hole drilling rod 7, and cutting cutterhead 2 is mounted on 6 top of cutterhead bracket；
The width of the support rod 11 and cutterhead bracket 6 is respectively less than the diameter of guide hole drilling rod 7；
The dynamical system 3 includes the first motor 31, hydraulic oil container 32, hydraulic oil pump 33 and hydraulic motor 34, and first is electronic
Machine 31, hydraulic oil container 32 and hydraulic oil pump 33 are installed in the main box 1, and hydraulic motor 34 is mounted in cutting cutterhead 2
Portion drives cutting cutterhead 2 to rotate, and the output end of first motor 31 is connect with the input terminal of hydraulic oil pump 33, hydraulic oil pump
33 oil inlet is connect with hydraulic oil container 32, and the oil outlet of hydraulic oil pump 33 is connect with the oil inlet of hydraulic motor 34, hydraulic horse
Oil outlet up to 34 is connect with hydraulic oil container 32.
Further, sealing maintenance door is provided on the rear end face of the main box 1.
Further, circulation is had on the guide hole drilling rod 7.
Embodiment two
As shown in Figure 3, Figure 4, the present invention is used for the perforating machine of this coal bed gas extraction, comprising: main box 1, moves cutting cutterhead 2
Force system 3, guiding connector 4 and propulsion system 5, the cuboid that the main box 1 is and slot cross sectional shape is adapted, cutting knife
Disk 2 is located at 1 front of main box, is connect by cutterhead bracket 6 with main box 1, and connect with the dynamical system 3 of its rotation is driven,
6 front end of cutterhead bracket is connect by being oriented to connector 4 with guide hole drilling rod 7；
The cutting cutterhead 2 is oblate cylindricality cutterhead, is densely covered with pick on periphery；
The propulsion system 5 includes horizontal drill 51 and promotes drilling rod 52, and horizontal drill 51 is located at 1 rear of main box, promotes and bores
52 one end of bar is connect with horizontal drill 51, and the other end is connect with main box 1.
Specifically, the shape of the cutterhead bracket 6 is the U-shaped that side is put, the upper and lower side of shaft is mounted on knife in cutting cutterhead 2
On the upper and lower end face of disc carrier 6, the advanced cutterhead 8 rotated with guide hole drilling rod 7, the cutterhead are set on the guide hole drilling rod 7
The width and height of bracket 6 are respectively less than the diameter of advanced cutterhead 8；
The dynamical system 3 is the second motor 35, and the second motor 35 is located at the rotation of 2 internal drive cutting cutterhead 2 of cutting cutterhead
Turn.
Further, circulation is had on the guide hole drilling rod 7.
Embodiment three
As shown in Figure 5, Figure 6, the present invention is used for the perforating machine of this coal bed gas extraction, comprising: main box 1, moves cutting cutterhead 2
Force system 3, guiding connector 4 and propulsion system 5, the cuboid that the main box 1 is and slot cross sectional shape is adapted, cutting knife
Disk 2 is located at 1 front of main box, is connect by cutterhead bracket 6 with main box 1, and connect with the dynamical system 3 of its rotation is driven,
6 front end of cutterhead bracket is connect by being oriented to connector 4 with guide hole drilling rod 7；
The cutting cutterhead 2 is oblate cylindricality cutterhead, is densely covered with pick on periphery；
The propulsion system 5 includes horizontal drill 51 and promotes drilling rod 52, and horizontal drill 51 is located at 1 rear of main box, promotes and bores
52 one end of bar is connect with horizontal drill 51, and the other end is connect with main box 1.
Specifically, the cutting cutterhead 2 is replaced with two cutting drums 9, two cutting drums 9 are located at 6 liang of cutterhead bracket
Side, and be arranged perpendicular to slot direction, the dynamical system 3 is third motor 36, and third motor 36 is located at the main tank
In body 1, and two cutting drums 9 are driven to rotate by bevel gear set；
The advanced cutterhead 8 rotated with guide hole drilling rod 7, the width and height of the cutterhead bracket 6 are set on the guide hole drilling rod 7
The diameter of respectively less than advanced cutterhead 8.
Further, sealing maintenance door is provided on the rear end face of the main box 1.
Further, circulation is had on the guide hole drilling rod 7.
The course of work of the invention is as follows.
Arrangement stope in advance, two sides haulage drift of constructing, uses drilling machine in the haulage drift of stope side
Pass through the lateral construction guide hole of guide hole drilling rod 7；The present invention connects in the haulage drift of the other side, by guiding connector 4 with guide hole drilling rod 7
It connects, and the mating advanced cutterhead 8 of installation if necessary, plays guiding and reaming, advanced cutterhead 8 are driven by guide hole drilling rod 7；It is main
Cabinet 1 slides under the promotion for promoting drilling rod 52 along slot, and the active force for balancing rotation torque when the invention works；
Cutting cutterhead 2 or cutting drum 9 obtain cutting pressure under the action of propulsion system 5, while rotating and starting cutting coal seam；Cutting
During coal seam, since 7 side of guide hole drilling rod has water circulation system, the coal of cutting is thus delivered to outside along slot
Tunnel；Continuous work of the present invention, until horizontal drill 51 will promote drilling rod 52 to pull out after reaching opposite side face haulage tunnel
Out, a working cycles are completed, then is installed to next position and carries out next slot work.
The present invention is suitable for the coal seam cutting that width is more than or equal to 1m, is highly more than or equal to 0.3m, passes through mechanical slot one
The secondary flat gap for cutting to design size realizes that this coal seam pressure relief and permeability improvement strengthens gas drainage.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Various change out.And thus protection of the changes and variations that derived from still in the invention claim
Among range.
Claims (7)
1. being used for the perforating machine of this coal bed gas extraction, characterized by comprising: main box (1), cutting cutterhead (2), dynamical system
It unites (3), guiding connector (4) and propulsion system (5), the cuboid that the main box (1) is and slot cross sectional shape is adapted are cut
Disc cutterbar (2) is located in front of main box (1), is connect by cutterhead bracket (6) with main box (1), and dynamic with driving it to rotate
Force system (3) connection, cutterhead bracket (6) front end are connect by being oriented to connector (4) with guide hole drilling rod (7)；
The cutting cutterhead (2) is oblate cylindricality cutterhead, is densely covered with pick on periphery；
The propulsion system (5) includes horizontal drill (51) and promotes drilling rod (52), after horizontal drill (51) is located at main box (1)
Side promotes drilling rod (52) one end to connect with horizontal drill (51), and the other end is connect with main box (1).
2. the perforating machine according to claim 1 for this coal bed gas extraction, it is characterised in that: the main box (1)
It further include the support rod (11) being fixed below its rectangular phosphor bodies, in one end and the propulsion system (5) of support rod (11)
Propulsion drilling rod (52) connection, the other end connect with the one end of cutterhead bracket (6), and the other end of cutterhead bracket (6) passes through guiding
Connector (4) is connect with guide hole drilling rod (7), and cutting cutterhead (2) is mounted on above cutterhead bracket (6)；
The width of the support rod (11) and cutterhead bracket (6) is respectively less than the diameter of guide hole drilling rod (7)；
The dynamical system (3) includes the first motor (31), hydraulic oil container (32), hydraulic oil pump (33) and hydraulic motor
(34), the first motor (31), hydraulic oil container (32) and hydraulic oil pump (33) are installed in the main box (1), hydraulic horse
Cutting cutterhead (2) internal drive cutting cutterhead (2) rotation, the output end and liquid of first motor (31) are mounted on up to (34)
The input terminal of pressure oil pump (33) connects, and the oil inlet of hydraulic oil pump (33) is connect with hydraulic oil container (32), hydraulic oil pump (33)
Oil outlet is connect with the oil inlet of hydraulic motor (34), and the oil outlet of hydraulic motor (34) is connect with hydraulic oil container (32).
3. the perforating machine according to claim 2 for this coal bed gas extraction, it is characterised in that: the main box (1)
Rear end face on be provided with sealing maintenance door.
4. the perforating machine according to claim 1 for this coal bed gas extraction, it is characterised in that: the cutterhead bracket
(6) shape is the U-shaped that side is put, and the upper and lower side of shaft is mounted on the upper and lower end face of cutterhead bracket (6) in cutting cutterhead (2),
Be set on the guide hole drilling rod (7) with guide hole drilling rod (7) rotate advanced cutterhead (8), the width of the cutterhead bracket (6) and
Height is respectively less than the diameter of advanced cutterhead (8)；
The dynamical system (3) is the second motor (35), and the second motor (35) is located at cutting cutterhead (2) internal drive cutting
Cutterhead (2) rotation.
5. the perforating machine according to claim 1 for this coal bed gas extraction, it is characterised in that: the cutting cutterhead
(2) it is replaced with two cutting drums (9), two cutting drums (9) are located at cutterhead bracket (6) two sides, and perpendicular to slot direction
Setting, the dynamical system (3) are third motor (36), and third motor (36) is located in the main box (1), and passes through
Bevel gear set drives two cutting drum (9) rotations；
The advanced cutterhead (8) rotated with guide hole drilling rod (7), the width of the cutterhead bracket (6) are set on the guide hole drilling rod (7)
Degree and height are respectively less than the diameter of advanced cutterhead (8).
6. the perforating machine according to claim 5 for this coal bed gas extraction, it is characterised in that: the main box (1)
Rear end face on be provided with sealing maintenance door.
7. being used for the perforating machine of this coal bed gas extraction according to claim 2 or 4 or 5, it is characterised in that: the guide hole
Circulation is had on drilling rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199393.6A CN109779678A (en) | 2019-03-15 | 2019-03-15 | Perforating machine for this coal bed gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199393.6A CN109779678A (en) | 2019-03-15 | 2019-03-15 | Perforating machine for this coal bed gas extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109779678A true CN109779678A (en) | 2019-05-21 |
Family
ID=66488108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910199393.6A Pending CN109779678A (en) | 2019-03-15 | 2019-03-15 | Perforating machine for this coal bed gas extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109779678A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469297A (en) * | 2019-09-09 | 2019-11-19 | 中煤科工集团西安研究院有限公司 | The complete hole equipment of coal mine gas extraction directional drilling long range screen casing and method |
| CN113622912A (en) * | 2021-07-30 | 2021-11-09 | 平顶山市安泰华矿用安全设备制造有限公司 | Outburst eliminating process for coal seam mining |
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| CN208416602U (en) * | 2018-04-09 | 2019-01-22 | 上海创力集团股份有限公司 | A kind of tunnelling machine mounted geophysical drilling machine |
| CN209724408U (en) * | 2019-03-15 | 2019-12-03 | 山东瑞源钾盐工程技术股份有限公司 | A kind of perforating machine for this coal bed gas extraction |
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2019
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| CN1135783A (en) * | 1993-07-12 | 1996-11-13 | 布罗肯希尔有限公司 | Highwall mining system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469297A (en) * | 2019-09-09 | 2019-11-19 | 中煤科工集团西安研究院有限公司 | The complete hole equipment of coal mine gas extraction directional drilling long range screen casing and method |
| CN110469297B (en) * | 2019-09-09 | 2021-08-20 | 中煤科工集团西安研究院有限公司 | Device and method for completing long-distance sieve tube in coal mine underground gas extraction directional drilling |
| CN113622912A (en) * | 2021-07-30 | 2021-11-09 | 平顶山市安泰华矿用安全设备制造有限公司 | Outburst eliminating process for coal seam mining |
| CN113622912B (en) * | 2021-07-30 | 2024-03-12 | 平顶山市安泰华矿用安全设备制造有限公司 | Outburst elimination technology for coal mining |
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Address after: No. 110, West Qinglonghu Road, Xin'an, Anqiu City, Weifang City, Shandong Province 262123 Applicant after: SHANDONG RUIYUAN SYLVITE ENGINEERING TECHNOLOGY Co.,Ltd. Applicant after: Taiyuan Design and Research Institute Group Co.,Ltd. of Coal Industry Address before: No. 110, West Qinglonghu Road, Xin'an, Anqiu City, Weifang City, Shandong Province 262123 Applicant before: SHANDONG RUIYUAN SYLVITE ENGINEERING TECHNOLOGY Co.,Ltd. Applicant before: TAIYUAN DESIGN Research Institute FOR COAL INDUSTRY |
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Effective date of registration: 20210120 Address after: 614001 No.1, 1st floor, unit 1, building 3, no.596 Jiazhou Avenue, Shizhong District, Leshan City, Sichuan Province Applicant after: Chen Heqing Applicant after: Zhu Yangdong Applicant after: Taiyuan Design and Research Institute Group Co.,Ltd. of Coal Industry Address before: No. 110, West Qinglonghu Road, Xin'an, Anqiu City, Weifang City, Shandong Province 262123 Applicant before: SHANDONG RUIYUAN SYLVITE ENGINEERING TECHNOLOGY Co.,Ltd. Applicant before: Taiyuan Design and Research Institute Group Co.,Ltd. of Coal Industry |