Fully mechanized coal mining face system for improving recovery ratio of mining area

Abstract

The invention discloses a fully mechanized coal mining face system for improving the recovery ratio of a mining area. The fully mechanized coal mining face system comprises a first mining face coal pillar A, an air return way, recovery solid coal, a rubber belt conveying way, a next mining face coal pillar B and an auxiliary conveying way which are sequentially and transversely arranged, wherein acoal mining machine, a scraper conveyer, a large side protection plate reinforced hydraulic support and a hydraulic support are arranged behind the recovery solid coal; the reinforced hydraulic support is arranged at one side of the first mining face coal pillar A; the reinforced hydraulic support comprises a reinforced lengthened top beam side protection plate, a reinforced lengthened shield beam side protection plate and a reinforced lengthened base side protection plate; a hydraulic oil cylinder is arranged between the base side protection plate and a base; the top beam side protection plate, the shield beam side protection plate and the base side protection plate of the reinforced hydraulic support jointly form a wind shielding wall; and a local pressure fan is hung on the reinforcedlengthened top beam side protection plate, or a pressure air pipe is paved in a mining face cable groove. The fully mechanized coal mining face system has the advantages that the coal pillar loss is reduced; the coal recovery rate is improved; high yield and high efficiency are realized; and the green and clean mining level of a mine is improved.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and relates to a fully mechanized mining face system for improving the recovery rate of a mining area. Background technique [0002] In the layout of the longwall fully mechanized mining face in traditional coal underground mining, coal pillars are left between the two working faces to control the movement of the overlying strata and to isolate harmful gases in the goaf. The coal pillars cannot be recovered in this working face layout. , the width of the coal pillar is about 10-25 meters, resulting in a large amount of waste of coal resources. In order to solve this problem, my country has formed a pillarless mining method represented by gob-side entry retention technology. Mining without coal pillars can effectively reduce the amount of roadway excavation and increase the coal recovery rate. It is one of the important ways for coal enterprises to improve safety conditions and technical and ...

AI Technical Summary

Problems solved by technology

Mining without coal pillars can effectively reduce the amount of roadway excavation and increase the coal recovery rate. It is one of the important ways for coal enterprises to improve safety conditions and technical and economic indicators. However, this method needs to form roadside support through artificial construction or filling. The integration of charging and charging is difficult, which will reduce the advancing speed of the working face to a certain extent. It is relatively more difficult for mines with high requirements for high-efficiency production and high-speed advancement to use this method to achieve the target output

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