CN111173560A

CN111173560A - Filling replacement mining method for 'three lower' coal pressing area

Info

Publication number: CN111173560A
Application number: CN202010132046.4A
Authority: CN
Inventors: 姜继巧; 王建军; 刘涛; 魏文杰; 王宜海; 薛建军
Original assignee: Zhen Fangfang
Current assignee: Zhen Fangfang
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2020-05-19

Abstract

The filling displacement mining method for the 'three-lower' coal pressing area comprises a tank turning cage chamber and a filling centralized transportation roadway and is characterized in that a concrete pump chamber is arranged below the tank turning cage chamber, a tank turning cage is arranged in the tank turning cage chamber, a bidirectional belt feeder is arranged below the tank turning cage, a centralized transportation rubber belt machine and a coal gangue bidirectional rubber belt machine are arranged below the bidirectional belt feeder, a gangue rubber belt machine is arranged on the right side of the coal gangue bidirectional rubber belt machine in a matched mode, a gangue throwing machine is arranged on one side of the gangue rubber belt machine, a concrete conveying pump is arranged in the concrete pump chamber, a grouting pipeline is connected to the outer side of the concrete conveying pump, a filling gateway is arranged on the end side of the filling centralized transportation roadway and comprises a plurality of odd number runners and even number runners, and the odd number runners are 'columns'.

Description

Filling replacement mining method for 'three lower' coal pressing area

Technical Field

The invention belongs to the technical field of coal mine safety mining, and particularly relates to a filling replacement mining method for a thick coal seam 'three-lower' coal pressing area.

Background

Coal mining under buildings, railways, water bodies and pressurized water bodies. When coal is mined under a building and a railway, the building and the railway are not damaged by mining influence, and coal is mined as much as possible. When coal mining is carried out under a water body and on a pressure-bearing water body, water inrush accidents of mines are prevented, and safe production of the mines is guaranteed. Of course, when mining coal under surface water bodies such as reservoirs, water reservoirs, canals and the like, besides preventing water inrush accidents of mines, the coal mining method also needs to ensure that the coal mining method is not damaged by the influence of mining.

Most of domestic mines have a large number of 'three-lower' coal pressing areas, and with the development of industry and urbanization, the 'three-lower' coal pressing area still has an increasing trend, and the production and mine service life of the mine area are severely limited. In the 'third lower' coal pressing, the coal is generally mined in a penetrating mining mode, which causes great waste to coal resources, the problems are always puzzling the sustainable development and the ecological environment of a mining area, and the implementation of filling mining and the liberation of the 'third lower' coal pressing become necessary choices for the sustainable development of mines. Based on the situation, the aims of improving resource recovery, increasing economic benefits and realizing scientific development are aimed at from the height of building resource-saving and environment-friendly enterprises, and the thinking of liberating 'three-down' coal pressing, implementing green mining and realizing that gangue does not go into a well are established.

After extensive research on the filling mining process, the existing filling mining process mainly comprises separation layer grouting, paste filling, waste rock filling after fully mechanized mining face erection, high-water and ultra-high-water filling and the like. The analysis shows that the filling modes are basically applied to thin and medium-thickness coal beds, the effect is good, and the filling modes have the characteristics, but for the thick coal beds with the length of 4-6 meters, no mature filling mining technology can be used for reference at present.

The invention aims to provide a 'three-lower' coal-pressing filling mining device for a thick coal seam so as to overcome the defects. In order to achieve the above object, the present invention has the following technical means.

The technology of the invention can improve the resource recovery rate of 'three lower' pressed coal to 90 percent, can ensure that the damage degree of surface buildings is controlled within the I-grade damage range, and can reduce the discharge amount of mine waste rock.

Drawings

FIG. 1 is a schematic view of the connection structure of the apparatus of the present invention;

FIG. 2 is a schematic view of the roadway connection structure of the present invention;

fig. 3 is a schematic cross-sectional structure of fig. 2I-I.

The notation in the figure is: 1. turning over the cage; 2. a bidirectional first belt feeder; 3. a concrete delivery pump; 4. grouting pipelines; 5. intensively transporting the belt conveyor; 6. a coal gangue bidirectional belt conveyor; 7. a gangue belt machine; 8. throwing a gangue machine; 9. a concrete pump chamber; 10. a roll-over cage chamber; 11. a coal flow centralized transportation lane; 12. auxiliary lifting of the transportation lane; 13. filling a centralized transportation lane; 14. filling the crossheading; 15. "column"; 16. "Beam"; 17. a coal seam; 18. a waste filling belt.

Detailed Description

The following description of embodiments and workflows for a better understanding of the invention is provided in conjunction with the accompanying drawings. The beam column type thick coal seam filling mining technology is characterized in that: the system comprises a filling mining system and a grouting system. Each system comprises a roadway chamber arrangement and an electromechanical equipment arrangement. The filling mining system mainly comprises a centralized transportation roadway, a filling gate way, a tank turnover cage chamber, a coal flow belt conveyor roadway and other auxiliary transportation roadways; the main electromechanical equipment of the filling mining system comprises a coal flow belt conveyor, a gangue tipper, a bidirectional first belt feeder, a coal gangue bidirectional belt conveyor, a gangue belt conveyor and a gangue throwing machine. The grouting system mainly comprises a stirrer chamber and a concrete pump chamber; the main electromechanical equipment of the grouting system comprises a stirrer, a concrete delivery pump and a grouting pipeline. The method is characterized in that roadways are excavated in an odd number sequence in a thick coal seam by utilizing the characteristic of quick excavation of a fully-mechanized excavating machine or a continuous coal mining machine, coal is mined in an excavation mode, then gangue slurry is used for filling, after two adjacent odd numbered roadways are filled, a column is formed, then a coal body between the two columns is mined, a coal seam roof supported by the two columns is equivalent to a beam, and a space between the beam and the column can be used for filling underground gangue. And performing odd-even mining on the coal field, and filling respectively to realize high-efficiency replacement of the coal by the gangue. Mine waste rocks are collected by adopting a tilting cage chamber system, and the waste rocks and coal are transported in two directions by adopting a coal and waste rock two-way belt conveyor.

As a further scheme of the invention: the grouting support material of the "column" may vary.

As a further scheme of the invention: and adding other accessory facilities such as a crusher, a gangue crushing and stirring machine and the like.

As shown in the figure, the filling mining system schematic diagram and the equipment arrangement schematic diagram are that mine waste rocks are collected in a waste rock collecting bin for standby through a tilting cage located in a tilting cage chamber. The filling gate is divided into odd gate and even gate, the odd gate is the 'column'. Firstly, extracting a 'pillar', transferring the extracted coal flow to a centralized transportation rubber belt machine through a coal gangue bidirectional rubber belt machine, converging the extracted coal flow into a mine coal flow system, filling concrete after the extraction of the 'pillar' is finished, positioning a concrete conveying pump in a concrete pump chamber, conveying the concrete to a 'pillar' filling area through a grouting pipeline, extracting coal bodies between two 'pillars' after the 'pillar' is filled, enabling a top plate supported by the two 'pillars' to be a 'beam', filling gangue in an area under the 'beam', enabling the gangue to enter the coal gangue bidirectional rubber belt machine through a bidirectional armor belt feeding machine in a gangue concentration bin, transferring the gangue rubber belt machine into the gangue rubber belt machine, and filling the gangue into the lower filling area under the 'beam' through a gangue throwing machine.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

The filling displacement mining method for the 'three-lower' coal pressing area comprises a tank turning cage chamber (10) and a filling centralized transportation roadway (13), and is characterized in that a concrete pump chamber (9) is arranged below the tank turning cage chamber (10), a tank turning cage (1) is arranged in the tank turning cage chamber (10), a bidirectional armor belt feeder (2) is arranged below the tank turning cage (1), a centralized transportation rubber belt machine (5) and a coal gangue bidirectional rubber belt machine (6) are arranged below the bidirectional armor belt feeder (2), a gangue rubber belt machine (7) is arranged on the right side of the coal gangue bidirectional rubber belt machine (6) in a matched mode, a gangue throwing machine (8) is arranged on one side of the gangue rubber belt machine (7), a concrete conveying pump (3) is arranged in the concrete pump chamber (9), a grouting pipeline (4) is connected to the outer side of the concrete conveying pump (3), a filling crossheading (14) is arranged on the end side of the filling centralized transportation roadway (13), the filling gate way (14) comprises a plurality of odd gate ways and even gate ways, the odd gate ways are 'columns' (15), the filling gate way (14) is divided into odd gate ways and even gate ways, the odd gate ways are 'columns' (15), firstly, the 'columns' (15) are recovered, the recovered coal flow is transferred to a centralized transportation rubber belt machine (5) through a coal gangue bidirectional rubber belt machine (6) and is converged into a mine coal flow system, the 'columns' (15) are filled with concrete after the recovery, a concrete transfer pump (3) is positioned in a concrete pump chamber (9), the concrete is transferred to a 'column' (15) filling area through a grouting pipeline (4), after the 'columns' (15) are filled, the coal body between the two 'columns' (15) is recovered, a top plate supported by the two 'columns' (15) is a 'beam' (16), and the lower area of the 'beam' (16) is filled with gangue, the gangue enters a coal gangue bidirectional adhesive tape machine (6) through a bidirectional first tape (2) feeder in a gangue centralized bin, is transferred to a gangue adhesive tape machine (7), and is filled to a beam (16) lower filling area through a gangue throwing machine (8).
2. The "under three" coal-pressing zone filling displacement mining method as claimed in claim 1, wherein the filling central haulage roadway (13) further comprises an auxiliary lifting haulage roadway (2) and a coal flow central haulage roadway (12).
3. The filling and displacing mining method for the 'under three' coal pressing area according to claim 1, wherein the centralized transportation belt conveyor (5), the coal gangue bidirectional belt conveyor (6) and the gangue belt conveyor (7) form a transmission set on the same plane, and the right end of the transmission set is a gangue dumping conveyor (8) for filling.