Strip mine end slope thin coal seam dendritic reverse type underground mining method

Abstract

The invention discloses a strip mine end slope thin coal seam dendritic reverse type underground mining method. The method includes the specific steps that S1, a continuous coal mining machine is adopted to excavate a main adit in the boundary direction of a strip mine along a coal seam bottom plate; S2, secondary adits start to be tunneled from the two sides of the main adit in the inclined front direction of the main adit, and the secondary adits are in lap joint with a plurality of sets of self-moving belt conveyors in the main adit; S3, the continuous coal mining machine is remotely controlled to be responsible for coal mining, and the self-moving belt conveyors transport excavated coal out of the main adit; S4, after excavation of one secondary adit is stopped, the continuous coal mining machine and the self-moving belt conveyors in the secondary adit are withdrawn, and subsequent secondary adits are arranged in sequence in the same way; S5, the secondary adit is filled, and a goaf of the main adit is filled; and S6, a project is circulated. According to the strip mine end slope thin coal seam dendritic reverse type underground mining method, end slope coal mining is achieved in a dendritic adit arrangement mode, so that the coal output is improved, meanwhile, coal retaining pillars and filling bodies are fully utilized to keep a roof stable, and the difficulty and the cost of construction and equipment moving are reduced.

Description

technical field [0001] The invention specifically relates to a dendritic retrograde tunnel mining method for side-side thin coal seams in an open-pit mine, which belongs to the field of coal mining in large-scale open-pit mines. Background technique [0002] Open-pit mining is an important method of coal mining in my country. Because of its high degree of mechanization and centralization, it is easy to realize modern management. Its output has exceeded 20% of the country's total annual coal output. Especially in the super-large open-pit coal mines in Northwest my country, the thickness of the main mining coal seam reaches more than 10m or even 100m, and its annual output has reached 3-100 times the production capacity of ordinary underground coal mines. However, in the mining process of large-scale open-pit coal mines, the recovery of side-wall pressed coal has always been an important factor affecting the coal mining rate of open-pit mines, especially the side-side thin coa...

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a branch-shaped retrograde tunnel mining method for side-side thin coal seams in open-pit mines, mainly to solve the problem of low mining efficiency of side-side pressure coal during mining in large-scale open-pit mines at the present stage. poor security issues

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