CN112211636A - Comprehensive mechanized coal mining method for irregular block sections - Google Patents
Comprehensive mechanized coal mining method for irregular block sections Download PDFInfo
- Publication number
- CN112211636A CN112211636A CN202011291376.4A CN202011291376A CN112211636A CN 112211636 A CN112211636 A CN 112211636A CN 202011291376 A CN202011291376 A CN 202011291376A CN 112211636 A CN112211636 A CN 112211636A
- Authority
- CN
- China
- Prior art keywords
- coal
- working face
- irregular
- mechanized
- coal mining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 116
- 238000005065 mining Methods 0.000 title claims abstract description 58
- 230000001788 irregular Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
- 230000032258 transport Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses an irregular block segment comprehensive mechanized coal mining method which is characterized by comprising the following steps: under the condition that the support strength and the empty top distance at the front end of the support top beam are not changed, a fully-mechanized excavating machine or a continuous miner is adopted to cut coal; loading the cut coal onto a shuttle car by using the fully-mechanized excavating machine or the continuous miner; the shuttle car is adopted to convey coal to a transfer conveyor of the transportation crossheading for coal unloading, and the coal is transferred to a rubber belt conveyor by the transfer conveyor and conveyed to the ground. The invention adopts the shuttle car to transport coal, and does not need to remove the connection between the working face head or tail bracket and the scraper conveyor for irregular blocks, thereby realizing the adaptation to the lengthened or shortened working face by increasing or decreasing the working face bracket in the retraction channel.
Description
Technical Field
The invention relates to the technical field of coal resource exploitation, in particular to an irregular block segment comprehensive mechanized coal mining method.
Background
China has rich coal resources, and the consumption proportion of coal in primary energy is large. Experts predict that the contribution rate of coal resources to economic development in China can occupy more than 50% of primary energy by 2030. In the coal mining process, the working face is generally arranged in a mode that a transportation gate way and an open-cut hole are perpendicular to each other. The arrangement mode of the working surface inevitably generates irregular blocks (triangular coal) which are not suitable for the long-wall fully mechanized mining of the coal mining machine, thereby wasting a large amount of high-quality coal resources and reducing the resource recovery rate. Due to the influence of faults and other geological structures, regular working surfaces cannot be arranged, and irregular blocks can be generated.
In addition, as a large number of coal pillars need to be reserved for protecting the mine roadway, when the coal mining approaches the tail sound, irregular mining areas of the type should be mined. Mine workers make some coal mining method improvements for liberating irregular block coal briquettes, such as mining triangular coal by a short-wall continuous coal mining method and a Wangeviry coal mining method. However, when the above-mentioned corner coal mining technology is applied, the new cut hole will have a great influence on the triangular coal mining, so most mines will choose to mine the corner coal first and then the longwall face, which seriously affects the normal longwall face mining operation, and makes the mine unable to realize high-efficiency mining.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a comprehensive mechanical coal mining method for irregular blocks. In order to realize the purpose, the invention adopts the technical scheme that: an irregular block segment comprehensive mechanized coal mining method is characterized by comprising the following steps:
under the condition that the support strength and the empty top distance of the front end of a support top beam are not changed, a fully-mechanized excavating machine or a continuous miner is adopted to cut coal;
secondly, loading the cut coal onto a shuttle car by using the fully-mechanized excavating machine or the continuous miner in the step one;
and step three, transporting the coal to a transfer conveyor of the transportation crossheading by adopting the shuttle car in the step two, unloading the coal, and transporting the coal to a rubber belt conveyor by the transfer conveyor to be transported to the ground.
The comprehensive mechanized coal mining method for the irregular block sections is characterized in that a working face in the support is supported by a working face hydraulic support, and the working face hydraulic support is pushed by a baffle to move;
the comprehensive mechanical coal mining method for the irregular block sections is characterized in that the comprehensive excavator or the continuous coal mining machine withdraws from a working face after cutting a coal cut, and then pushes a coal shoveling plate and a pulling frame to complete a working cycle;
the distance between the coal shoveling plate and the pulling frame is consistent with the cutting depth every time, and the coal shoveling plate and the pulling frame are matched with the existing support, and the coal pushing and pulling frame is pushed twice every time; in the process of withdrawing the fully-mechanized excavating machine, the following machine pushes a shovel and a pull frame from the tail to the head once; after the comprehensive digging machine exits from the working face, the shovel and the pull frame are pushed to the tail by the machine head once, and a coal cutting cycle is completed.
The comprehensive mechanical coal mining method for the irregular block sections is characterized in that when an included angle between a working face return air roadway and a cutting hole is an obtuse angle, a working face hydraulic support is preset in a withdrawal channel, and the working face hydraulic support preset in the withdrawal channel is added to a part which is lengthened due to the fact that a working face is pushed along with the pushing of the working face.
The comprehensive mechanized coal mining method for irregular block sections is characterized in that when an included angle between the working face return air roadway and the open-cut hole is an obtuse angle, the working face hydraulic support with the shortened working face is retracted to the retraction channel along with the movement of the working face.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the shuttle car to transport coal, does not need to remove the connection between the working face machine head or the machine tail support and the scraper conveyor for irregular blocks, and improves the mining efficiency.
2. The invention does not adopt a scraper conveyor to convey coal, so that the supports can be directly added to the working surface or the supports can be withdrawn to the withdrawal channel, and the connection between the supports at the head or the tail of the working surface and the scraper conveyor is not required to be removed, thereby realizing the purpose of adapting to the working surface which is lengthened or shortened by increasing or reducing the supports at the working surface in the withdrawal channel.
3. The working face support of the invention adopts the working face hydraulic support, the working face hydraulic support can be pushed by the coal baffle side ledge, and the automatic movement is realized under the condition of not being connected with the scraper conveyor. 4. The invention can not only carry out mechanical mining on the residual irregular coal mining blocks of the mine, but also carry out mechanical mining on the roadway protection coal pillar before the mining of the coal bed of the mine is finished.
The invention is described in further detail below with reference to the figures and examples.
Drawings
Fig. 1 is a configuration diagram of equipment with an obtuse included angle between an irregular working surface air return roadway and a cut hole.
Fig. 2 is a configuration diagram of the equipment with an acute included angle between the irregular working surface return air roadway and the open-off cut hole.
Fig. 3 is a layout of the comprehensive mechanized irregular working face and roadway of the present invention.
Description of reference numerals:
1-hydraulic support at the stoping line of the working face; 2-a reversed loader;
3, fully-mechanized excavating machine; 4-working face hydraulic support; 5, working face air return crossheading;
6-working face transportation crossheading 7-working face coal body to be mined; 8, a shuttle car;
9-working face gob; 10-regular working face stopping production line;
11, cutting holes on an irregular working surface; 12-coal belt conveyor lane;
13-return airway of coal plate area; 14-coal panel Dongfei major haulage roadway.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.
The invention discloses a comprehensive mechanized coal mining method for irregular block sections.
After the comprehensive mechanized coal mining machine cuts coal to a regular long-wall working face stopping line 10, under the condition that the strength of a support 1 and the empty top distance of the front end of a support top beam are not changed, a fully mechanized coal mining machine or a continuous coal mining machine 3 is adopted to cut coal, and a shuttle car 8 is adopted to transport coal; coal is loaded onto the shuttle car 8 using a roadheader or shearer loader 3. The shuttle car 8 transports the coal to the transportation crossheading 6, unloads the coal through the transfer conveyor 2, and transports the coal to the rubber belt conveyor from the transfer conveyor 2 to be transported to the ground.
In the embodiment, the shuttle car is adopted to transport the coal, and for irregular blocks, the connection between the working face head or tail support and the scraper conveyor does not need to be removed, so that the long or short working face can be adapted in a mode of increasing or reducing the working face support in the retraction channel.
In the support, a working face is supported by a working face hydraulic support, the irregular working face hydraulic support 4 is pushed by the aid of the side ledge of the coal blocking plate, and the support moving does not need the assistance of a scraper conveyor. The top plate management method adopts the caving type top plate management which is the same as that of the original regular working face.
The fully-mechanized excavating machine or the continuous miner 3 retreats from the working face after cutting a coal cut, and then pushes the coal shoveling plate and the pulling frame to complete a working cycle. The distance between the coal shoveling plate and the pulling frame is consistent with the cutting depth every time, and the coal pushing and pulling frame is pushed twice every time. In the process of withdrawing the fully-mechanized excavating machine, the following machine pushes a shovel and a pull frame from the tail to the head once. After the comprehensive digging machine exits from the working face, the shovel and the pull frame are pushed to the tail by the machine head once, and a coal cutting cycle is completed.
When the working face is pushed to the irregular block section, the length of the working face is changed compared with the length of the original regular working face, and the invention adapts to the length of the lengthened or shortened working face by flexibly increasing or reducing the working face bracket 4 in the return air crossheading 5.
Specifically, when an included angle between a working face air return roadway and a cutting hole is an obtuse angle, a working face hydraulic support is preset in a retraction channel, and the working face hydraulic support preset in the retraction channel is increased to a part which is lengthened due to the transition of a working face along with the transition of the working face; when the included angle between the working face air return roadway and the cut-out hole is an obtuse angle, the working face hydraulic support withdrawing support with the shortened part of the working face is withdrawn to the withdrawing channel along with the lapse of the working face. The method can be suitable for mechanical rapid mining of irregular working faces with large length variation range, not only can perform mechanical rapid mining on the residual irregular coal mining blocks of the mine, but also can perform mechanical rapid mining on the large roadway protection coal pillar before the mining of the coal bed of the mine is finished. Referring to fig. 1 and 2, fig. 1 is a configuration diagram of equipment in which an included angle between an irregular working surface return air channel 5 and a cut-out hole 11 is an obtuse angle according to an embodiment. Fig. 2 is a configuration diagram of the equipment of the irregular working surface return air channel 5 and the open-cut holes 11 in an acute angle according to an embodiment. In fig. 1 and 2, the incision length is L.
The invention is further described below in connection with the working surfaces 14201 to 14207 and 14204 to 14208 of the 4-2 coal seams, Convergence mining, Inc.
About 70 million tons of irregular block coal resources can be mined from the working faces 14201-14207 and 14204-14208 of the 4-2 coal seams 14201-14207 of the Fuxing mining company Limited.
Through years of comprehensive mining practice and theoretical verification, comprehensive mechanical rapid mining is carried out on the irregular 4-2 coal seam blocks by adopting a comprehensive excavator or a continuous miner, and the arrangement of a comprehensive mechanical irregular working face and a roadway is shown in figure 3.
(1) Irregular working face output
The length of the irregular working surface is 20-100 meters, and the average length is 60 meters. The coal is fed once per shift on average, and the cycle progress is 1.46 m. One cycle of coal cutting per shift, the shift yield is as follows: 1.46 × 3.6 × 60 × 1.3 ═ 410 (ton). The monthly production of the working face is calculated according to 25 days: 410 × 3 × 25 ═ 30750 (ton).
(2) Safe production of irregular working surface
Firstly, a fully mechanized support and a liquid supply system are adopted for supporting the irregular working face comprehensively, the area of the top control of the working face after coal cutting is consistent with that of fully mechanized mining, and the caving roof is managed. The hydraulic support can completely meet the safety requirement of top plate management.
Secondly, the trackless electric anti-explosion shuttle car matched with the scheme is a mature product used for many years in large and medium-sized coal mines, and is safe and reliable.
And the mining of the irregular working face adopts a normal negative pressure ventilation system and a safety monitoring system, is consistent with the normal fully mechanized mining working face, and can meet the requirement of national safety management.
(3) Analysis of economic and social benefits
5-2, after the coal mining is finished, the coal resources of the irregular blocks of the mine exceed 120 ten thousand tons. The coal resources can be produced by the mine about 190 ten thousand tons, and the economic benefit can be produced by 57000 ten thousand yuan. In the Shenmu area, because of more medium and small coal mines, the area of the well field is irregular, and more irregular small blocks are formed in the mine exploitation. The whole shenmu area has more than 120 mines, each mine can recover one hundred million to two thousand tons of coal resources according to 100 million tons of coal resources, and the economic benefit is good. If the coal mining method can be widely popularized and applied nationwide, the economic benefit is considerable.
The invention does not adopt a scraper conveyor to convey coal, so that the supports can be directly added to the working surface or the supports can be withdrawn to the withdrawal channel, and the connection between the supports at the head or the tail of the working surface and the scraper conveyor is not required to be removed, thereby realizing the purpose of adapting to the working surface which is lengthened or shortened by increasing or reducing the supports at the working surface in the withdrawal channel.
The invention can not only carry out mechanical mining on the residual irregular coal mining blocks of the mine, but also carry out mechanical mining on the roadway protection coal pillar before the mining of the coal bed of the mine is finished.
The invention improves the recovery rate of coal by recovering the coal resources of irregular blocks, and has better economic benefit.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (5)
1. An irregular block segment comprehensive mechanized coal mining method is characterized by comprising the following steps:
under the condition that the support strength and the empty top distance of the front end of a support top beam are not changed, a fully-mechanized excavating machine or a continuous miner is adopted to cut coal;
secondly, loading the cut coal onto a shuttle car by using the fully-mechanized excavating machine or the continuous miner in the step one;
and step three, transporting the coal to a transfer conveyor of the transportation crossheading by adopting the shuttle car in the step two, unloading the coal, and transporting the coal to a rubber belt conveyor by the transfer conveyor to be transported to the ground.
2. The comprehensive mechanized coal mining method for irregular blocks according to claim 1, wherein the working face in the support is supported by a working face hydraulic support, and the working face hydraulic support is pushed to move by a baffle plate.
3. The comprehensive mechanized coal mining method for irregular blocks according to claim 2, wherein the fully mechanized coal mining machine or the continuous coal mining machine exits from a working face after cutting a coal, and then pushes a coal shoveling plate and a pulling frame to complete a working cycle;
the distance between the coal shoveling plate and the pulling frame is consistent with the cutting depth every time, and the coal shoveling plate and the pulling frame are matched with the existing support, and the coal pushing and pulling frame is pushed twice every time; in the process of withdrawing the fully-mechanized excavating machine, the following machine pushes a shovel and a pull frame from the tail to the head once; after the comprehensive digging machine exits from the working face, the shovel and the pull frame are pushed to the tail by the machine head once, and a coal cutting cycle is completed.
4. The comprehensive mechanized coal mining method for irregular blocks according to claim 3, wherein when an included angle between the working face return air roadway and the open-cut hole is an obtuse angle, a working face hydraulic support is preset in the withdrawal channel, and the working face hydraulic support preset in the withdrawal channel is increased to a part which is lengthened due to the working face being pushed along with the working face.
5. The comprehensive mechanized coal mining method for irregular blocks according to claim 3, wherein when the included angle between the working face return air roadway and the open-cut hole is an obtuse angle, the hydraulic support of the working face, which is shortened due to the working face, is retracted to the retraction channel along with the movement of the working face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291376.4A CN112211636B (en) | 2020-11-18 | 2020-11-18 | Comprehensive mechanized coal mining method for irregular block sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291376.4A CN112211636B (en) | 2020-11-18 | 2020-11-18 | Comprehensive mechanized coal mining method for irregular block sections |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112211636A true CN112211636A (en) | 2021-01-12 |
| CN112211636B CN112211636B (en) | 2023-04-28 |
Family
ID=74056915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011291376.4A Active CN112211636B (en) | 2020-11-18 | 2020-11-18 | Comprehensive mechanized coal mining method for irregular block sections |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211636B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB283598A (en) * | 1927-01-15 | 1929-02-14 | Demag Ag | Improvements in methods and means for filling in disused workings and the like in mines |
| CN102704935A (en) * | 2012-05-31 | 2012-10-03 | 库尔勒金川矿业有限公司 | Extra-long working surface fully mechanized coal mining process |
| CN104500069A (en) * | 2014-11-27 | 2015-04-08 | 中国煤炭科工集团太原研究院有限公司 | Continuous coal mining machine top-coal mining process for extremely-thick coal seam bound coal |
| CN111305842A (en) * | 2020-03-13 | 2020-06-19 | 中煤科工开采研究院有限公司 | Rapid butt joint installation method based on cutter handle type fully mechanized coal mining face |
-
2020
- 2020-11-18 CN CN202011291376.4A patent/CN112211636B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB283598A (en) * | 1927-01-15 | 1929-02-14 | Demag Ag | Improvements in methods and means for filling in disused workings and the like in mines |
| CN102704935A (en) * | 2012-05-31 | 2012-10-03 | 库尔勒金川矿业有限公司 | Extra-long working surface fully mechanized coal mining process |
| CN104500069A (en) * | 2014-11-27 | 2015-04-08 | 中国煤炭科工集团太原研究院有限公司 | Continuous coal mining machine top-coal mining process for extremely-thick coal seam bound coal |
| CN111305842A (en) * | 2020-03-13 | 2020-06-19 | 中煤科工开采研究院有限公司 | Rapid butt joint installation method based on cutter handle type fully mechanized coal mining face |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112211636B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104405437B (en) | A kind of solid filling with combine the hybrid working face mining method of adopting | |
| CN104088643B (en) | A kind of high-dipping point blank coal seam Sub-Level Caving coal-mining method | |
| CN103104260B (en) | Under complex geological condition, comprehensive-machine is to hand-pulled noodles coal-mining method | |
| CN104481578B (en) | A kind of high gas layer large-mining-height working surface mash gas harnessing method | |
| CN109869150B (en) | Mine resource subsection full-mining local-charging mining method | |
| US11994027B2 (en) | Dendritic reverse underground mining method for thin coal seam at end slope of strip mine | |
| CN108825237B (en) | A kind of special thick coal continuous milling machine divides excavating technology with the layering combined is filled | |
| CN110424966B (en) | Ultrahigh water material filling working face gangue pumping entry retaining non-coal pillar mining method | |
| CN113653492B (en) | Method for preventing rock burst in filling mining | |
| CN102877848B (en) | Method for performing coal mining and gangue cementation stripe filling simultaneously | |
| CN111946345A (en) | Fully-mechanized caving mining method for layering under ultra-thick hard coal | |
| CN109630112B (en) | N00 mining method of cut top filling | |
| CN108457652B (en) | A kind of blockette segmentation full blast pressure shortwall even adopts placement method | |
| CN109577981A (en) | A kind of high seam pillar recovery method | |
| CN116163730A (en) | Method for mining and sealing carbon dioxide by bidirectional forward filling of thin coal layer drilling machine | |
| CN113153295A (en) | Mining method for extremely thick hard coal | |
| CN101824986A (en) | Coal mining process of drilling, loading, conveying and anchoring integral machine | |
| CN105971607A (en) | Method for gob-side entry retaining of medium-thickness coal seam | |
| CN109973094B (en) | Mine resource same-face full-mining local-filling mining method | |
| CN111364994A (en) | Fully-mechanized mining-to-filling continuous propulsion collaborative mining method | |
| CN112211636B (en) | Comprehensive mechanized coal mining method for irregular block sections | |
| CN111828005B (en) | Face mining method | |
| CN111946393B (en) | Coal mining system and method for overlong solid filling working face | |
| CN117386367B (en) | Fully-mechanized mining method for multi-filling long walls of left strip coal pillar | |
| CN113586057B (en) | Method for safely and efficiently recovering interval columns of segmented open-field subsequent filling method panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 719300 Ma Jia Ta Xiang Eat Kai Gou Cun, Shenmu City, Yulin City, Shaanxi Province Patentee after: Shenmu Huixing Mining Co.,Ltd. Address before: 719300 chikaigou village, Majiata Township, Shenmu City, Ankang City, Shaanxi Province Patentee before: Shenmu Huixing Mining Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |