CN110439610B - Remote slurry filling and conveying system and method for coal mine goaf - Google Patents
Remote slurry filling and conveying system and method for coal mine goaf Download PDFInfo
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- CN110439610B CN110439610B CN201910816640.2A CN201910816640A CN110439610B CN 110439610 B CN110439610 B CN 110439610B CN 201910816640 A CN201910816640 A CN 201910816640A CN 110439610 B CN110439610 B CN 110439610B
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- 239000002002 slurry Substances 0.000 title claims abstract description 202
- 238000011049 filling Methods 0.000 title claims abstract description 122
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 134
- 238000003860 storage Methods 0.000 claims abstract description 62
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005272 metallurgy Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010926 purge Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- -1 gangue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Pipeline Systems (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a remote slurry filling and conveying system in a coal mine goaf, which comprises a slurry preparation system, a slurry storage tank and a self-cleaning system, wherein a slurry outlet of the slurry preparation system is communicated with a slurry inlet of the slurry storage tank, a slurry outlet of the slurry storage tank is communicated with a filling working surface through a slurry conveying pump and a filling pipeline, and the self-cleaning system is communicated with the slurry inlet of the slurry storage tank through a cleaning pipeline. The coal mine goaf remote slurry filling and conveying system realizes long-distance large-traffic filling and coal mine loss reduction green exploitation, and can be widely applied to industries such as metallurgy mine and the like. The invention also discloses a remote slurry filling and conveying method for the goaf of the coal mine.
Description
Technical Field
The invention belongs to the technical field of coal mine filling and mining, and particularly relates to a coal mine goaf remote slurry filling and conveying system and a coal mine goaf remote slurry filling and conveying method.
Background
At present, solid wastes such as gangue, coal slime, fly ash and the like generated in the coal exploitation, washing and power generation processes of China and waste residues generated in the coal chemical production are generally piled up on the ground, the solid wastes occupy the ground and pollute the environment, and the solid wastes need to be subjected to well returning filling so as to realize the pollution-free filling exploitation of coal mine loss reduction.
The existing coal mine slurry filling and mining technology mainly has the following problems: (1) In general slurry filling and mining technology, a plunger pump is used for filling slurry, and the method has the problems of short filling distance and small filling capacity due to the limitation of the technology; (2) Each time slurry filling needs to be carried out on a pipeline, the water requirement of the flushing pipeline is large, and the drainage of a water well of a pipe washing well is difficult; (3) When the working surface is in suspension of filling due to various factors, slurry can be precipitated in the pipeline, and the pipeline can be blocked if the working surface is slightly longer; (4) the initial equipment investment is high.
Disclosure of Invention
The invention aims to provide a remote slurry filling and conveying system for a coal mine goaf, which solves the problems that a plunger pump filling and mining technology cannot convey materials remotely, has small filling capacity, is troublesome in pipeline flushing after each filling or during system maintenance, is difficult in underground pipe washing water drainage and is difficult in circulating disturbance to prevent slurry precipitation and pipe blockage.
The invention provides a remote slurry filling and conveying method for a coal mine goaf, which is also used for solving the problems that a plunger pump filling and mining technology cannot convey materials remotely, the filling capacity is small, the flushing of a pipeline is troublesome after each filling or during system maintenance of slurry filling and mining, the drainage of underground pipe washing water is difficult, and the problems of slurry precipitation prevention, pipe blocking and the like due to circulation disturbance.
In order to achieve the above purpose, the first technical scheme adopted by the invention is that the remote slurry filling and conveying system for the goaf of the coal mine comprises a slurry preparation system, a slurry storage tank and a self-cleaning system, wherein a slurry outlet of the slurry preparation system is communicated with a slurry inlet of the slurry storage tank, a slurry outlet of the slurry storage tank is communicated with a filling working surface through a slurry conveying pump and a filling pipeline, and the self-cleaning system is communicated with a slurry inlet of the slurry storage tank through a cleaning pipeline.
The first technical proposal of the invention has the following characteristics,
The slurry preparation system consists of a feeder, a crusher, a first classifying screen, a mill, a second classifying screen and a water supply tank; the feed inlet of mill respectively with the discharge gate of first classifying screen, the discharge gate intercommunication of second classifying screen, the water inlet and the supply tank of mill are connected, the discharge gate of mill with the feed inlet intercommunication of second classifying screen, the discharge gate of second classifying screen with the feed inlet intercommunication of pulp storage jar, the feed inlet of first classifying screen with the discharge gate of breaker is connected, the feed inlet of breaker respectively with the discharge gate of first classifying screen, the discharge gate intercommunication of batcher.
The slurry storage tank comprises a first slurry storage tank and a second slurry storage tank, the filling pipeline comprises a first filling pipeline and a second filling pipeline, and the slurry conveying pump comprises a first slurry conveying pump and a second slurry conveying pump; the slurry outlet of the slurry preparation system is communicated with the slurry inlet of the first slurry storage tank, the slurry outlet of the first slurry storage tank is communicated with the slurry inlet of the second slurry storage tank through a first slurry conveying pump and a first filling pipeline, and the slurry outlet of the second slurry storage tank is communicated with the filling working surface through a second slurry conveying pump and a second filling pipeline.
The second filling pipeline is an annular closed pipeline, the upper end of the annular closed pipeline is communicated with the second slurry conveying pump, and the lower end of the annular closed pipeline is communicated with the filling working surface.
The self-cleaning system comprises a cleaning tank, a water pump is connected to an outlet of the cleaning tank, the cleaning pipeline comprises a first cleaning pipeline, a second cleaning pipeline, a third cleaning pipeline, a fourth cleaning pipeline and a fifth cleaning pipeline, the first cleaning pipeline is connected to the water pump and a slurry outlet close to the first filling pipeline, the second cleaning pipeline is connected to one side of the upper end of the water pump and one side of the upper end of the annular closed pipeline, the third cleaning pipeline is connected between two sides of the annular closed pipeline close to the lower end, one end of the fourth cleaning pipeline is connected to the other side of the upper end of the annular closed pipeline, the other end of the fourth cleaning pipeline is respectively communicated with a slurry inlet of the second slurry storage tank and an inlet of the cleaning tank, and one end of the fifth cleaning pipeline is connected with an outlet of the first slurry conveying pump, and the other end of the fifth cleaning pipeline is communicated with the slurry inlet of the first slurry storage tank.
The other end of the fifth cleaning pipeline is also communicated with an inlet which is a water supply tank.
And stirrers are arranged in the first slurry storage tank and the second slurry storage tank.
The first slurry conveying pump and the second slurry conveying pump are formed by sequentially connecting a slurry feeding pump and a diaphragm pump.
In order to achieve the second purpose, the second technical proposal adopted by the invention is that a coal mine goaf remote slurry filling and conveying method,
The method is implemented in the following manner:
Closing a cleaning pipeline of the self-cleaning system, and opening a filling pipeline to enable slurry prepared by the slurry preparation system to be conveyed to a filling working surface through the filling pipeline;
Closing the filling pipeline, opening a cleaning pipeline of the self-cleaning system, and cleaning the filling pipeline by clean water in a clean water tank (17) through the cleaning pipeline, wherein the liquid generated by cleaning flows back into the slurry storage tank.
The beneficial effects of the invention are as follows: the invention relates to a remote slurry filling and conveying system and a remote slurry filling and conveying method for a coal mine goaf, which are based on the principle that a pipeline is utilized for conveying slurry, so that the conveying distance is long, the capacity is large, the pipeline is free from cleaning, the problem of difficult drainage of underground pipe washing water is solved, and the problems of slurry precipitation and pipe blockage are prevented; parallel operation of coal mining and filling in the production process of the coal mining working face; the filling system realizes long-distance large-traffic filling and coal mine loss reduction green exploitation, and can be widely applied to industries such as metallurgical mine and the like.
Drawings
FIG. 1 is a schematic diagram of a remote slurry filling and conveying system in a coal mine goaf according to the present invention.
The system comprises a first classification sieve, a first grinding machine, a second classification sieve, a third classification sieve, a valve F 1, a valve F 2, a valve 8, a stirrer, a first slurry storage tank, a valve 10, a slurry feeding pump, a diaphragm pump, a valve F 3, a valve F 4, a valve F 5, a valve 15, a second slurry storage tank, a valve F 6, a clean water tank, a water pump, a valve F 7, a valve 20, a second cleaning pipeline, a valve F 8, a valve F22, a third cleaning pipeline, a valve F 9, a valve F 10, a valve F25, a mixing pipeline, a valve 26, a delivery pump 27, a stirrer, a valve F 11, a valve 29, a second filling pipeline, a valve F 12, a valve F31, a fourth cleaning pipeline, a valve F32, a second delivery pump, a valve F 5, a fifth cleaning pipeline, a first slurry supply pipeline 35, a first filling pipeline, a first cleaning system and a cleaning system 38.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and the specific embodiments.
As shown in FIG. 1, the remote slurry filling and conveying system for the goaf of the coal mine comprises a slurry preparation system 38, a slurry storage tank and a self-cleaning system, wherein a slurry outlet of the slurry preparation system 38 is communicated with a slurry inlet of the slurry storage tank, a slurry outlet of the slurry storage tank is communicated with a filling working surface through a slurry conveying pump and a filling pipeline, and the self-cleaning system is communicated with the filling pipeline and the slurry inlet of the slurry storage tank through a cleaning pipeline.
Specifically:
The slurry preparation system consists of a feeder 1, a crusher 2, a first classifying screen 3, a mill 4, a second classifying screen 5 and a water supply tank 35; the feed inlet of the mill 4 is respectively communicated with the feed outlet of the first classifying screen 3 and the feed outlet of the second classifying screen 5, the water inlet of the mill 4 is connected with the water supply tank 35, the feed outlet of the mill 4 is communicated with the feed inlet of the second classifying screen 5, the feed outlet of the second classifying screen 5 is communicated with the feed inlet of the slurry storage tank, the feed inlet of the first classifying screen 3 is connected with the feed outlet of the crusher 2, and the feed inlet of the crusher 2 is respectively communicated with the feed outlet of the first classifying screen 3 and the feed outlet of the feeder 1; both the first classifying screen 3 and the second classifying screen 5 can return the larger screened particulate material to reprocessing.
The slurry storage tank comprises a first slurry storage tank 9 and a second slurry storage tank 15, the filling pipeline comprises a first filling pipeline 36 and a second filling pipeline 29, and the slurry delivery pump comprises a first slurry delivery pump 33 and a second slurry delivery pump 32; the slurry outlet of the slurry preparation system is communicated with the slurry inlet of the first slurry storage tank 9, the slurry outlet of the first slurry storage tank 9 is communicated with the slurry inlet of the second slurry storage tank 15 through the first slurry conveying pump 33 and the first filling pipeline 36, and the slurry outlet of the second slurry storage tank 15 is communicated with the filling working surface through the second slurry conveying pump 32 and the second filling pipeline 29.
The second filling pipe 29 is an annular closed pipe, the upper end of which is communicated with the second slurry transfer pump 32, and the lower end of which opens into the filling working face.
The self-cleaning system comprises a cleaning tank 17, a water pump 18 is connected to the outlet of the cleaning tank 17, the cleaning pipeline comprises a first cleaning pipeline 37, a second cleaning pipeline 20, a third cleaning pipeline 22, a fourth cleaning pipeline 31 and a fifth cleaning pipeline 34, the first cleaning pipeline 37 is connected to the water pump 18 and a slurry outlet close to the first filling pipeline 36, the second cleaning pipeline 20 is connected to one side of the upper end of the water pump 18 and the annular closed pipeline, the third cleaning pipeline 22 is connected between two sides of the annular closed pipeline close to the lower end, one end of the fourth cleaning pipeline 31 is connected to the other side of the upper end of the annular closed pipeline, the other end of the fourth cleaning pipeline is respectively communicated with a slurry inlet of the second slurry storage tank 15 and an inlet of the cleaning tank 17, one end of the fifth cleaning pipeline 34 is connected to an outlet of the first slurry conveying pump 33, and the other end of the fifth cleaning pipeline 34 is communicated with a slurry inlet of the first slurry storage tank 9 and an inlet of the water supply tank 35.
The first slurry storage tank 9 and the second slurry storage tank 15 are internally provided with stirrers 8, and the stirrers 8 are used for stirring the slurry to prevent the slurry from precipitating.
The first slurry transfer pump 33 and the second slurry transfer pump 32 are each formed by sequentially connecting a slurry feed pump and a diaphragm pump, and when the pressure difference is small, the slurry feed pump can be used for auxiliary operation.
The working principle of the remote slurry filling and conveying system for the goaf of the coal mine is briefly described below:
When the slurry filling work is normally carried out: closing valve F 6 on first purge line 37, valve F 7 19 on second purge line 20, valve F 9 on third purge line 22, valves F 4 and F 5 14 in fourth purge line 31, and valves F 2 and F 1 7 in fifth purge line 34, opening valves F 3 12 and F 8 21 in first and second fill lines 36 and 29, Valve F 10 24, valve F 11 and valve F 12 30 are closed at the same time, or valve F 11 and valve F 12 are opened, valve F 8 and valve F 10 are closed, or valve F 8, valve F 10, valve F 11 and valve F 12 are opened, so that the slurry prepared by the slurry preparation system is conveyed into the mixing pipeline 25 under the mine through the second filling pipeline 29, meanwhile, cement paste or other cementing materials produced by a mixer 27 under the mine are also conveyed into a mixing pipeline 25 through a conveying pump 26, and are conveyed to a filling working surface after being mixed;
While the slurry filling operation is suspended, the first filling line 36 is cleaned: opening a valve F 6 on the first cleaning pipeline 37 and a valve F 2 of the fifth cleaning pipeline 34, closing a valve F 7 on the second cleaning pipeline 20, closing a valve F 3 in the first filling pipeline 36, closing a valve F 1, cleaning the first filling pipeline 36 by clean water in the clean water tank 17, returning the liquid generated by cleaning into the first slurry storage tank 9, closing a valve F 2 in the fifth cleaning pipeline 34 when the cleaning liquid is clean water, opening a valve F 1 in the fifth cleaning pipeline 34, discharging the clean water into the water supply tank 35, and ending the cleaning work.
When the slurry filling operation is suspended, the second filling line 29 is cleaned: opening a valve F 7 on the second cleaning pipeline 20, a valve F 9 23 on the third cleaning pipeline 22 and a valve F 5 14 on the fourth cleaning pipeline 31, closing a valve F 6 on the first cleaning pipeline 37, closing a valve F 4 13 on the fourth cleaning pipeline 31, closing a valve F 8 21, a valve F 10 24, a valve F 11 and a valve F 12 in the second filling pipeline 29, cleaning water in the clean water tank 17 cleans the second filling pipeline 29, and returning liquid generated by cleaning to the second slurry storage tank 15, opening a valve F 4 13 on the fourth cleaning pipeline 31 when the cleaning liquid is clean water, closing a valve F 5 to enable the clean water to flow into the clean water tank 17, and ending the cleaning work.
The invention discloses a method for filling and conveying long-distance slurry in a coal mine goaf, which is implemented in the following manner:
Closing a cleaning pipeline of the self-cleaning system, and opening a filling pipeline to enable slurry prepared by the slurry preparation system to be conveyed to a filling working surface through the filling pipeline;
Closing the filling pipeline, opening a cleaning pipeline of the self-cleaning system, and cleaning the filling pipeline by clean water in the clean water tank 17 through the cleaning pipeline, wherein the liquid generated by cleaning flows back into the slurry storage tank.
Closing a cleaning pipeline of the self-cleaning system, and opening a filling pipeline to enable slurry prepared by the slurry preparation system to be conveyed to a filling working surface through the filling pipeline, wherein the following concrete steps are as follows: closing the first cleaning pipeline 37, the second cleaning pipeline 20, the third cleaning pipeline 22, the fourth cleaning pipeline 31 and the fifth cleaning pipeline 34, and opening the first filling pipeline 36 and the second filling pipeline 29 to enable the slurry prepared by the slurry preparation system to be conveyed to a filling working surface;
Closing the filling pipeline, opening a cleaning pipeline of the self-cleaning system, cleaning the filling pipeline by clean water in a clean water tank 17 through the cleaning pipeline, and returning liquid generated by cleaning to the slurry storage tank, wherein the following concrete steps are as follows: (1) Opening the first cleaning pipeline 37 and the fifth cleaning pipeline 34, closing the second cleaning pipeline 20, the third cleaning pipeline 22 and the fourth cleaning pipeline 31, closing the first filling pipeline 36, opening the second filling pipeline 29, cleaning the first filling pipeline 36 by clean water in the clean water tank 17, and refluxing the liquid generated by cleaning into the first slurry storage tank 9; (2) The second cleaning pipeline 20, the third cleaning pipeline 22 and the fourth cleaning pipeline 31 are opened, the first cleaning pipeline 37 and the fifth cleaning pipeline 34 are closed, the first filling pipeline 36 and the second filling pipeline 29 are closed, clean water in the clean water tank 17 cleans the second filling pipeline 29, and liquid generated by cleaning flows back into the second slurry storage tank 15.
Claims (5)
1. The remote slurry filling and conveying system for the goaf of the coal mine is characterized by comprising a slurry preparation system (38), a slurry storage tank and a self-cleaning system, wherein a slurry outlet of the slurry preparation system is communicated with a slurry inlet of the slurry storage tank, the slurry outlet of the slurry storage tank is communicated with a filling working surface through a slurry conveying pump and a filling pipeline, and the self-cleaning system is communicated with the slurry inlet of the slurry storage tank through a cleaning pipeline;
the slurry preparation system consists of a feeder (1), a crusher (2), a first classifying screen (3), a mill (4), a second classifying screen (5) and a water supply tank (35); the feeding port of the mill (4) is communicated with the discharging port of the first classifying screen (3), the water inlet of the mill (4) is connected with the water supply tank (35), the discharging port of the second classifying screen (5) is respectively communicated with the feeding port of the mill (4) and the feeding port of the first slurry storage tank (9), the feeding port of the first classifying screen (3) is connected with the discharging port of the crusher (2), and the feeding port of the crusher (2) is respectively communicated with the discharging port of the first classifying screen (3) and the discharging port of the feeder (1);
The slurry storage tank comprises a first slurry storage tank (9) and a second slurry storage tank (15), the filling pipelines comprise a first filling pipeline (36) and a second filling pipeline (29), and the slurry conveying pump comprises a first slurry conveying pump (33) and a second slurry conveying pump (32); the slurry outlet of the slurry preparation system is communicated with the slurry inlet of the first slurry storage tank (9), the slurry outlet of the first slurry storage tank (9) is communicated with the slurry inlet of the second slurry storage tank (15) through a first slurry conveying pump (33) and a first filling pipeline (36), and the slurry outlet of the second slurry storage tank (15) is communicated with a filling working surface through a second slurry conveying pump (32) and a second filling pipeline (29);
The second filling pipeline (29) is an annular closed pipeline, the upper end of the annular closed pipeline is communicated with the second slurry conveying pump (32), and the lower end of the annular closed pipeline is communicated with the filling working surface;
The self-cleaning system comprises a clean water tank (17), a water pump (18) is connected to an outlet of the clean water tank (17), the cleaning pipeline comprises a first cleaning pipeline (37), a second cleaning pipeline (20), a third cleaning pipeline (22), a fourth cleaning pipeline (31) and a fifth cleaning pipeline (34), the first cleaning pipeline (37) is connected to the water pump (18) and a slurry outlet close to a first filling pipeline (36), the second cleaning pipeline (20) is connected to one side of the upper end of the water pump (18) and one side of the upper end of the annular closed pipeline, the third cleaning pipeline (22) is connected between two sides of the annular closed pipeline close to the lower end, one end of the fourth cleaning pipeline (31) is connected to the other side of the upper end of the annular closed pipeline, the other end of the fourth cleaning pipeline is respectively communicated with a slurry inlet of a second slurry storage tank (15) and a slurry inlet of the clean water tank (17), and one end of the fifth cleaning pipeline (34) is connected to the outlet of the first conveying pump (33) and the other end of the fifth cleaning pipeline is communicated with the slurry inlet of the first slurry storage tank (9).
2. The goaf remote slurry filling and conveying system for a coal mine as claimed in claim 1, wherein the other end of the fifth cleaning pipeline (34) is also communicated with an inlet of a water supply tank (35).
3. The coal mine goaf remote slurry filling and conveying system according to claim 2, wherein the first slurry storage tank (9) and the second slurry storage tank (15) are internally provided with a stirrer (8).
4. A coal mine goaf remote slurry filling and conveying system according to claim 3, wherein the first slurry conveying pump (33) and the second slurry conveying pump (32) are formed by sequentially connecting a slurry feeding pump and a diaphragm pump.
5. A method for filling and conveying long-distance slurry in a goaf of a coal mine, which is based on the long-distance slurry filling and conveying system in the goaf of the coal mine, and is characterized by being implemented in the following way:
Closing a cleaning pipeline of the self-cleaning system, and opening a filling pipeline to enable slurry prepared by the slurry preparation system to be conveyed to a filling working surface through the filling pipeline;
Closing the filling pipeline, opening a cleaning pipeline of the self-cleaning system, and cleaning the filling pipeline by clean water in a clean water tank (17) through the cleaning pipeline, wherein the liquid generated by cleaning flows back into the slurry storage tank.
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| CN201910816640.2A CN110439610B (en) | 2019-08-30 | 2019-08-30 | Remote slurry filling and conveying system and method for coal mine goaf |
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| CN201910816640.2A CN110439610B (en) | 2019-08-30 | 2019-08-30 | Remote slurry filling and conveying system and method for coal mine goaf |
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| CN110439610B true CN110439610B (en) | 2024-06-04 |
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| CN111158304B (en) * | 2019-12-31 | 2021-01-26 | 陕西神渭煤炭管道运输有限责任公司 | Slurry pipeline conveying cascade control system and control method thereof |
| CN116085036B (en) * | 2023-02-28 | 2023-08-15 | 通用技术集团工程设计有限公司 | Filling device for coal mine goaf |
| CN117314371A (en) * | 2023-11-30 | 2023-12-29 | 济宁矿业集团有限公司霄云煤矿 | Intelligent management platform for coal mine solid filling |
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