The mining technology of double-mechanized mining face with large mining height

Abstract

The invention provides a large-mining-height dual-fully mechanized mining face stoping process. The stoping process comprises the following steps: (1) determining whether the coal-seam thickness of a mining area of a working face to be mined is within the range of 3.5-7.0m, whether the geological structure is simple and relatively stable in thickness and whether the inclination angle is smaller than 12 degrees; and (2) arranging three parallel stoping tunnels in a main tunnel of a vertical mining area, communicating every two adjacent tunnels by use of an open-off cut to form a large-mining-height fully mechanized mining face, and then forming a left large-mining-height fully mechanized mining face and a right large-mining-height fully mechanized mining face, wherein the dip separation of the two faces is determined according to a formula as described in the specification. The large-mining-height dual-fully mechanized mining face stoping process is used for solving the technical problem that the large-mining-height fully mechanized mining face is incapable of breaking through the yield of 10 million tons / a to a large extent, and meanwhile, provides the enough security guarantee and cost control.

Description

technical field [0001] The invention relates to a mining technology, in particular to a mining technology with large mining height and double fully mechanized mining face. Background technique [0002] In the past 5 years, the height of the full thickness of the single mining with large mining height and fully mechanized mining has been continuously refreshed. At present, the maximum thickness of primary mining at the large mining height fully mechanized mining face has reached 7.0m. The main reasons for the large-scale development of large-scale fully mechanized mining in my country are as follows: First, there are 3.5-7.0m coal seams in Jin, Mongolia, Shan, Ning, Xin and other mining areas in my country, and the thickness of the coal seam is relatively stable and the dip angle is small. It belongs to the near-horizontal coal seam, and it can arrange the working face with long direction and inclined length; second, the equipment parameters and performance of the coal machine...

AI Technical Summary

Problems solved by technology

[0007] At present, under the constraints of coal mining equipment and technical level, there is no recovery technology that can achieve a substantial increase in the unit production of fully mechanized mining face with large mining height after breaking through 10 million t / a.

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