Surrounding rock control method for large-section dismantling tunnel of fully-mechanized mining face

Abstract

The invention relates to the technical field of fast moving of ultra-large mining height (greater than or equal to 5m) fully-mechanized mining faces of coal mines, and provides a surrounding rock control method for a large-section dismantling tunnel of a fully-mechanized mining face. The method comprises the following steps of performing driving from a roof of a coal seam along a stop line to form a tunnel communicated with gate roads on the two sides of the mining face, and performing supporting; driving a plurality of coal rooms to form roof control coal pillars on the side, close to the mining face, of the tunnel, and performing supporting, performing downward bottom extension on the tunnel along the stop line to form a part of section of the dismantling tunnel, supporting the two sides of a brush expansion part, and hardening a bottom plate; pushing the mining face ahead, and cutting the remaining coal pillars between the current mining face and the stop line to form the dismantling tunnel of the fully-mechanized mining face. According to the method, bottom coal for side protection and the coal pillars for roof control are reserved, so that a chock support and other temporary supports, which are required to be arranged when a conventional mining face is communicated with the dismantling tunnel, are removed, heavy equipment for an ultra-large mining height (greater than or equal to 5m) fully-mechanized mining face is safely and reliably dismantled, the dismantling cost is greatly lowered, and reliable guarantee is provided for the rapid moving of the mining face.

Description

technical field [0001] The invention relates to the technical field of fast moving of fully mechanized coal mine working faces, in particular to a method for controlling surrounding rock of large section retraction passages of fully mechanized working faces with extra-large mining height (≥5m). Background technique [0002] At present, the ultra-thick (≥5m) coal seam is the main coal seam for high-yield and high-efficiency mining in my country, and the technical level of the ultra-thick coal seam determines the technological progress and overall strength of the coal industry. As we all know, the rapid retraction of the fully mechanized mining face is not only an important part of the mine to achieve safe production, but also directly restricts the improvement of the unit production level of the fully mechanized mining face. Surrounding rock control method for withdrawal passage. [0003] In the prior art, there are three main modes for controlling the retraction channel of ...

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Problems solved by technology

[0022] The technical problem to be solved by the present invention is to solve the problems of high maintenance cost and poor surrounding

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