A Coal Mining Method for Separate Mining of Coal and Gangue in Thick Gangue Coal Seam

Abstract

The invention discloses a coal mining method for separate mining of coal and gangue in a thick gangue-containing coal seam. It is characterized in that the upper, middle and lower troughs are respectively arranged on the upper, middle and lower parts of the longwall coal mining face, and the coal mining face is divided into upper and lower sections, and the upper part of the working face is equipped with a conventional working face self-moving hydraulic support, The roof is managed by the caving method, and a normal scraper conveyor is supplemented. The motor is placed on the upper end of the working face and transported downward. The mined coal and gangue are transported downward to the gangue in the Zhongshun trough by the scraper conveyor. Separation platform; the length of the lower section of the working face is just enough to fill the gangue extracted from the working face and the lower section in the goaf, and a self-moving hydraulic filling support with a goaf retaining board is installed, and the filling method is adopted Management of the roof, supplemented by a high-power short-distance scraper conveyor, the motor is placed at the lower end of the working face, and transported upwards, the mined coal and gangue are transported upwards to the Zhongshun trough for coal and gangue separation by a high-power short-distance scraper conveyor tower.

Description

technical field [0001] The invention relates to the technical problem of a mining method in the field of mining engineering, in particular to a coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams. Background technique [0002] The mining of composite structure coal seams with large gangue thickness is a difficult problem in the field of coal mining: [0003] One of the difficulties is that the current shearer has insufficient power for crushing gangue and consumes a lot of picks: [0004] The second difficulty is that gangue is mixed with coal flow, which affects coal quality, increases transportation costs, and pollutes the environment. [0005] For this reason, for the thicker gangue coal seam, many mines have given up mining, and even if they are reluctantly mined, they are also produced under low efficiency and low output state. Contents of the invention [0006] In order to solve the above-mentioned technical problems, the...

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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides a coal mining method for separate mining of coal and gangue in a thick gangue-containing coal seam. There are mining problems of gangue coal seams with large thickness, compared with the existing technology, it has the advantages of less consumption and high mining efficiency

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