CN108194084B - End slope mining method of continuous coal mining machine for open-pit end slope mine - Google Patents
End slope mining method of continuous coal mining machine for open-pit end slope mine Download PDFInfo
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- CN108194084B CN108194084B CN201711326006.8A CN201711326006A CN108194084B CN 108194084 B CN108194084 B CN 108194084B CN 201711326006 A CN201711326006 A CN 201711326006A CN 108194084 B CN108194084 B CN 108194084B
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- 239000003245 coal Substances 0.000 title claims abstract description 172
- 238000005065 mining Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000011049 filling Methods 0.000 claims description 88
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011068 loading method Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/28—Methods of surface mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
- E21C47/02—Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like
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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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Abstract
The invention belongs to the technical field of application of coal mining equipment and coal mining methods, and particularly relates to an end slope mining process of a continuous coal mining machine for open-pit end slope mines. The method comprises the following steps of 101-mining surface arrangement; 102-setting an equipment installation preparation area; 103-arranging installation equipment; 104-arranging a ventilation system; and 105-continuous miner mining. The invention adopts complete mining equipment of the continuous coal mining machine, meets the requirement of mechanized mining of the end slope ore, improves the mechanization level of the end slope ore mining, greatly improves the production efficiency, reduces the labor intensity of workers, reduces the stripping amount of rock soil and reduces the damage and disturbance to the environment.
Description
Technical Field
The invention belongs to the technical field of application of coal mining equipment and coal mining methods, and particularly relates to an end slope mining method of a continuous coal mining machine for an open-pit end slope mine.
Background
And after the open-pit mining is finished, residual ores remained around the open-pit boundary are the end slope ores, and the end slope ores account for 5% -16% of the total mining reserves through excavation statistics. The end slope coal mining technology is a technology for performing raw coal mining by utilizing exposed coal seam arrangement coal mining equipment at the end slope of an open pit coal mine stope, and does not need to be separately stripped or built.
Generally, after a mine is mined in the open air for many years, a formed high and steep passing slope is in a limit balance state, and mining end slope mine tends to influence the safety and stability of the slope.
The coal mining process mainly based on the end slope coal mining machine is widely applied abroad, and the process form not only has the advantages of flexibility and reliability of equipment, but also has an environment-friendly and efficient process form. The damage degree to the earth surface in the process of mining is far less than that of the traditional surface mining process, and the mountain vegetation is not damaged.
Because the end slope coal mining machine is large in size, high in power demand and high in price, few coal mines are used for recycling end slope coal by using the end slope coal mining machine in China, and related technologies are slow in development. In recent years, with the success of localization of continuous miner, the development of end slope mining by using the continuous miner is faster.
Disclosure of Invention
The invention aims to solve the problems and provides an end slope mining method of a continuous coal mining machine for an open-pit end slope mine.
The invention adopts the following technical scheme: an end slope mining method of a continuous coal mining machine for open-pit end slope mines comprises the following steps,
101-mining face arrangement: forming a step before an end slope mine, stoping coal from one end of an end slope mine working face, arranging coal rooms, reserving coal pillars between the two coal rooms, setting a certain coal room as a coal room bypass at intervals of a certain number of coal rooms, constructing the coal room bypass before stoping other coal rooms, requiring good support, and ventilating by using a local ventilator; the equipment first-aid repair function of the coal house side channel means that when the equipment needs to be repaired by entering personnel, a first-aid repair channel is constructed from the coal house side channel to the equipment accident point, and the maintenance personnel enter the accident site from the channel to perform equipment maintenance.
102-setting an equipment installation preparation area: and according to the requirements of the end slope mining process, on the front steps of the end slope mining working face, sequentially assembling the devices according to the device arrangement.
103 arranging and installing equipment: arranging excavating, transporting, supporting and controlling equipment in the installation preparation area in sequence: a continuous miner, a transfer device, a protective ceiling and a control center.
104 arranging a ventilation system: the mining face is ventilated by negative pressure from the induced draft tube of the fan on the continuous miner to the outside of the coal room opening, and a wet dust collector is arranged on the continuous miner or the belt conveyor.
105-continuous miner mining: the continuous coal mining machine is tunneled according to a central line, a coal room chamber is excavated and formed at one time, a coal dropping process is completed, the continuous coal mining machine is provided with a loading and transporting device, when cutting is performed, the loading and transporting device is continuously operated to load coal into a middle conveyor, the conveyor transports the coal to a following transfer device to be transferred to the outside of the chamber opening, after the continuous coal mining machine completes one coal room, the continuous coal mining machine exits from the coal room, enters the next coal room opening to be mined, and is sequentially mined until a mining working face is finished. The coal pillar can be recovered by matching with filling, the filling and the recovery are implemented, and the full recovery of coal resources is realized
In the step 105, filling and stoping are carried out by adopting the following method, filling and mining are carried out on an end slope mining surface, in the first stage, a coal room bypass is excavated and stoped, and meanwhile, stoped coal rooms are filled; and in the second stage, after the strength of the filling body meets the requirement, the reserved coal pillars are recovered under the support of the filling body, meanwhile, the space after the coal pillars are recovered is timely filled, and in the third stage, the coal room bypass is filled, so that the coal replacement is finally realized.
The filling mining process parameters are as follows: the coal room, the coal pillars and the coal room side channels have the same once cutting width as that of the continuous coal mining machine, the depth of the coal room can be determined according to geological conditions and equipment production capacity, the continuous coal mining machine adopts a vertical feed mode, and after the three stages of stoping and filling, the coal pillars are not left between the coal rooms.
After the continuous coal mining machine exits from a coal room, a special mold is installed at the mouth of the coal room to construct a closed goaf filled with a filling sealing wall, filling holes are reserved, filling pipelines extend into a side channel of the coal room, a pipeline control valve is arranged at a partition, the filling holes are constructed at one side of a roadway, the filling pipelines are installed, paste filling slurry is conveyed to the goaf by the filling pipelines to be filled, after filling is completed, the filling holes are sealed, the side channel of the coal room is filled in a retreat mode, the sealing wall is arranged at the road junction of the roadway, the filling holes are reserved, after filling is completed, the filling holes are sealed, slurry is automatically solidified, and the goaf is tightly filled.
The width of the coal room is the same as the width of one-time cutting of the continuous coal mining machine; the continuous miner adopts a vertical feed mode.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts complete mining equipment of the continuous coal mining machine, meets the requirement of mechanized mining of the end slope ore, improves the mechanization level of the end slope ore mining, greatly improves the production efficiency, reduces the labor intensity of workers, reduces the stripping amount of rock soil and reduces the damage and disturbance to the environment.
(2) The filling mining is matched, the end slope can be effectively controlled to be stable, secondary disasters are reduced, a large amount of waste such as coal gangue, waste solid, powder ash and the like can be consumed for filling the goaf, waste is changed into fixed, and the pollution to the surrounding environment is reduced.
Drawings
FIG. 1 is a schematic top plan view of an end wall mining of a continuous miner;
FIG. 2 is a schematic illustration of an end wall mining profile of a continuous miner;
FIG. 3 is a schematic illustration of an end wall mining ventilation apparatus of the continuous miner;
FIG. 4 is a schematic diagram of a first-aid repair channel of the equipment;
FIG. 5 is a schematic illustration of an end slope fill mining process I of the continuous miner;
FIG. 6 is a schematic illustration of an end slope fill mining process of the continuous miner II;
FIG. 7 is a schematic illustration of an end slope fill mining process III of the continuous miner;
FIG. 8 is a schematic illustration IV of an end slope fill mining process for a continuous miner;
FIG. 9 is a schematic illustration of an end slope fill mining process V of the continuous miner;
1-a coal house, 2-a coal pillar, 3-a coal house bypass, 4-a continuous miner, 5-a transfer device, 6-a protective ceiling, 7-a control center, 8-a fan, 9-an air duct, 10-a rush-repair channel, 11-a working face filling material conveying pipeline, 12-a pipeline control valve and 13-a filling sealing wall.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Coal rooms are arranged on the end wall mining working face, and isolation coal pillars with different widths are reserved between two adjacent coal rooms. And (4) adopting a continuous miner to carry out coal room extraction and sequential operation. According to mining requirements, filling mining can be achieved, and a filling management system is required to fill paste in a mining empty coal room to form mining and filling alternate operation.
The method comprises the following specific steps:
(1) and face mining arrangement:
a step is formed in front of an end slope mine, coal is mined from one end of an end slope mine working face, coal rooms 1 are arranged, coal pillars 2 with different widths are reserved between the two coal rooms, and a certain coal room is set to be a coal room bypass 3 every a certain number of coal rooms.
(2) And setting an equipment installation preparation area:
according to the requirements of the end slope mining process, on the front steps of the end slope mining working face, equipment is assembled according to the equipment arrangement in sequence;
(3) arranging installation equipment:
arranging excavating, transporting, supporting and controlling equipment in the installation preparation area in sequence: the continuous miner 4, the transfer device 5, the protective ceiling 6 and the control center 7;
(4) arranging a ventilation system:
and (3) carrying out negative pressure ventilation from an induced draft tube 9 of a machine-mounted fan 8 of the continuous miner 4 to the outside of the coal room 1 port on the mining face (a wet dust collector can be arranged on the continuous miner 4 or an adhesive tape machine).
(5) And mining by a continuous miner:
the continuous coal mining machine 4 is tunneled according to the center line, and the chamber of the coal room 1 is excavated and formed at one time, so that the coal dropping process is completed. The continuous miner 4 is provided with a loading device, when cutting, the loading mechanism continuously operates to load coal into the middle conveyor, the conveyor conveys the coal to the transfer device 5 which is next to the conveyor and transfers the coal to the outside of the opening of the chamber, and after the continuous miner 4 finishes one coal room 1, the coal room 1 is withdrawn and enters the opening of the next coal room 1 for recovery.
The coal room side channel 3 is constructed before other coal rooms 1 start to recover, requires good support, is ventilated by a local fan, and has the main function of being used for equipment rush-repair or grout injection (if a filling mining method is adopted) when other coal rooms 1 are tunneled.
The equipment rush-repair function of the coal house side channel 3 means that when the equipment needs to be repaired by entering personnel, a rush-repair channel 10 is constructed from the 3 straight equipment accident points of the coal house side channel, and the maintenance personnel enter the accident site from the channel to perform equipment repair.
The control center 7 can remotely control all the equipment in the control center, complete all the functional actions of the equipment and realize the mining of the end slope coal room.
The end slope mining process parameters of the continuous coal mining machine are as follows: the width of the coal room 1 is the same as the once cutting width of the continuous miner 4, and the depth of the coal room 1 can be determined according to geological conditions and equipment production capacity; the continuous miner 4 adopts a vertical feed mode, and coal pillars 2 with different widths can be reserved between the adjacent coal rooms 1 according to the process.
And the matching of the filling process can improve the recovery rate of the coal mine resources at the end slope and realize the stable balance of the high and steep end slope. The method comprises the following specific steps:
(1) the filling mining is implemented on the end slope mining face, and the technical principle is that the mining and filling part of the working face is divided into three stages: firstly, digging out a coal room bypass 3, carrying out stoping (first-stage stoping) on a coal room 1, and simultaneously filling the stoped coal room 1 (excluding the coal room bypass 3) (first-stage filling); secondly, after the strength of the filling body meets the requirement, the reserved coal pillars 2 are recovered under the support of the filling body (second-stage recovery), meanwhile, the space after the coal pillars 2 are recovered is timely filled (second-stage filling), finally, the coal room bypass 3 is filled (third-stage filling), and finally, the replacement of coal is realized.
(2) Arranging a filling device: ground fabric paste filling equipment: the filling material storage bin, the filling stirring station, the filling industrial pump and the ground filling material conveying pipeline are arranged; the working face paste filling equipment is arranged: a working face filling material transportation pipeline (filling pipeline for short) 11, a pipeline control valve 12 and a filling sealing wall 13.
(3) Preparing a paste filling material: the paste filling slurry is prepared according to the requirements of filling strength and filling distance based on occurrence conditions and geological conditions of coal seams, the filling slurry has proper strength, and the cost is reasonable. Because the second-stage coal pillar extraction 2 needs to be carried out under the condition that the filling body formed by the filling in the first stage 1 supports the top plate, the bearing capacity and the stability of the filling body column are particularly important, the filling body in the first stage is in a cementing body form, and the roof contact rate must meet the requirement.
(4) The filling mining process parameters are as follows: the coal room 1, the coal pillars 2 and the coal room side channels 3 have the same cutting width with the continuous mining machine 4, the depth of the coal room 1 can be determined according to geological conditions and equipment production capacity, the continuous mining machine 3 adopts a vertical feed mode, and after mining in three stages, the coal pillars 2 are not reserved among the coal rooms 1.
(5) Filling the paste filling material into the mining chamber: after the continuous miner 4 exits the coal room 1, a special mold is arranged at the opening of the coal room 1 to construct a filling airtight wall 13 to seal a goaf, and a filling hole is reserved. The filling pipeline 11 extends into the coal room bypass 4, a pipeline control valve 12 is arranged at a partition, a filling hole is constructed at one side of the roadway, the filling pipeline 11 is installed, paste filling slurry is conveyed to the goaf by the filling pipeline 11 for filling, and after filling is completed, the filling hole is sealed. The coal room side channel 3 is filled in a retreating mode, a sealing wall 13 is arranged at the road junction of the coal room, a filling hole is reserved, after filling is finished, the filling hole is sealed, slurry is automatically solidified, and a gob is compacted.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (3)
1. An end slope mining method of a continuous coal mining machine for open-pit end slope mines is characterized by comprising the following steps: the following steps are adopted for the preparation method,
101-mining face arrangement: forming a step before an end slope mine, stoping coal from one end of an end slope mine working face, arranging coal rooms (1), reserving coal pillars (2) between the two coal rooms (1), setting a certain coal room as a coal room bypass (3) at intervals of a certain number of coal rooms (1), constructing the coal room bypass (3) before stoping the other coal rooms (1), requiring good support, and ventilating by using a local ventilator; the equipment rush-repair function of the coal house side channel (3) means that when the equipment needs to be repaired by entering personnel, a rush-repair channel (10) is constructed from the coal house side channel (3) to the equipment accident point, and the maintenance personnel enters the mine accident point from the channel to perform equipment repair;
102-setting an equipment installation preparation area: according to the requirements of the end slope mining process, on the front steps of the end slope mining working face, equipment is assembled according to the equipment arrangement in sequence;
103 arranging and installing equipment: arranging excavating, transporting, supporting and controlling equipment in the installation preparation area in sequence: the continuous miner (4), the transfer device (5), the protective ceiling (6) and the control center (7);
104 arranging a ventilation system: a wind induction barrel (9) of an onboard fan (8) of the continuous miner (4) is used for carrying out negative pressure ventilation outside the opening of the coal room (1) on the mining face, and a wet dust collector is arranged on the continuous miner (4) or the belt conveyor;
105-continuous miner mining: the continuous coal mining machine (4) is tunneled according to a central line, the chamber of the coal room (1) is excavated and formed at one time to complete a coal dropping process, the continuous coal mining machine (4) is provided with a loading and transporting device, when cutting is carried out, the loading and transporting mechanism is continuously operated to load coal into a middle conveyor, the conveyor transports the coal to a transfer device (5) which is next to the conveyor to be transferred to the outside of the chamber opening, after the continuous coal mining machine (4) completes one coal room (1), the coal room (1) is withdrawn, the coal enters the next coal room (1) opening to be stoped, and the stoping is sequentially carried out until the stoping face is finished.
2. The face end slope mine shearer highwall mining method as defined in claim 1, wherein: in the step 105, filling and stoping are carried out by adopting the following method, filling and mining are carried out on an end slope mining surface, in the first stage, a coal room bypass is excavated and stoped, and meanwhile, stoped coal rooms are filled; in the second stage, after the strength of the filling body meets the requirement, the reserved coal pillars are recovered under the support of the filling body, meanwhile, the space after the coal pillars are recovered is timely filled, in the third stage, the coal room bypass is filled, and finally, the replacement of coal is realized;
the filling mining process parameters are as follows: the coal room, the coal pillars and the coal room side channels are the same as the once cutting width of the continuous coal mining machine, the depth of the coal room can be determined according to geological conditions and equipment production capacity, the continuous coal mining machine adopts a vertical feed mode, and after the recovery in three stages, the coal pillars are not left between the coal rooms;
after the continuous coal mining machine exits from a coal room, a special mold is installed at the mouth of the coal room to construct a closed goaf filled with a filling sealing wall, filling holes are reserved, filling pipelines extend into a side channel of the coal room, a pipeline control valve is arranged at a partition, the filling holes are constructed at one side of a roadway, the filling pipelines are installed, paste filling slurry is conveyed to the goaf by the filling pipelines to be filled, after filling is completed, the filling holes are sealed, the side channel of the coal room is filled in a retreat mode, the sealing wall is arranged at the road junction of the roadway, the filling holes are reserved, after filling is completed, the filling holes are sealed, slurry is automatically solidified, and the goaf is tightly filled.
3. The face end slope mine shearer highwall mining method as defined in claim 2, wherein: the width of the coal room (1) is the same as the once cutting width of the continuous miner (4); the continuous miner (4) adopts a vertical feed mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108868878B (en) * | 2018-06-25 | 2020-09-08 | 山东科技大学 | Room and pillar type paste filling replacement coal mining method |
| CN109098717B (en) * | 2018-10-12 | 2021-01-08 | 太原科技大学 | Open-air side coal mining rolling type conveying device |
| CN109296369B (en) * | 2018-10-12 | 2020-04-21 | 太原科技大学 | Technology for recycling side coal of open-air continuous excavation working face |
| CN109915146A (en) * | 2019-03-22 | 2019-06-21 | 中国煤炭科工集团太原研究院有限公司 | A kind of long-range control highwall coalcutter highwall laneway type recovery method |
| CN110056356B (en) * | 2019-03-22 | 2020-12-08 | 中国煤炭科工集团太原研究院有限公司 | Stepping type walking platform |
| CN109931066B (en) * | 2019-03-22 | 2020-09-22 | 中国煤炭科工集团太原研究院有限公司 | Strip mine side wall mining system |
| CN109882239B (en) * | 2019-03-27 | 2020-06-30 | 中国矿业大学 | Open-pit end slope coal-pressing radial filling mining method |
| CN110578518B (en) * | 2019-08-28 | 2021-09-14 | 中国煤炭科工集团太原研究院有限公司 | Vertical feed type mining process suitable for fully mechanized mining face of thin coal seam |
| CN114000883A (en) * | 2021-11-02 | 2022-02-01 | 中国矿业大学 | Open pit coal mine end slope coal pressing, mining and charging integrated recovery device and method |
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