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Surrounding rock control method for large section retraction channel in fully mechanized mining face

A fully-mechanized mining face and retraction channel technology, which is applied in the field of surrounding rock control for large-section retraction channels in fully-mechanized mining faces with extra-large mining heights, can solve the problems of poor control of surrounding rocks and high maintenance costs for large-section retraction channels. Achieve the effect of reducing the cost of retraction, reducing the cost of excavation and support, and shortening the formation time

Inactive Publication Date: 2016-04-13
中泰德恒(北京)矿业科技有限公司 +2
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  • Claims
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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 rock control effect of the large-section retraction channel in the existing extra-large mining height (≥5m) fully mechanized mining face

Method used

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  • Surrounding rock control method for large section retraction channel in fully mechanized mining face
  • Surrounding rock control method for large section retraction channel in fully mechanized mining face
  • Surrounding rock control method for large section retraction channel in fully mechanized mining face

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[0054] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] Based on the conventional moving technology, the retraction channel takes a long time to form, the stability of the coal wall is poor, and the single-channel retraction space is relatively narrow, which is not conducive to the withdrawal of extra-large mining heights and heavy equipment; and the existing dual-channel moving retraction technology has high moving costs and investment. Due to the shortcomings of large coal pillars and large losses, this embodiment provides a new method for controlling the surrounding rock of the withdrawal channel of the fully mechanized mining face. What needs to be clarified is that the so-called "retraction channel" refers to the withd...

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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 rapid relocation of fully mechanized mining working faces in coal mines, in particular to a method for controlling the surrounding rock of a large-section retraction channel in a fully mechanized mining working face with an extra-large mining height (≥5m). Background technique [0002] At present, the extra-thick (≥5m) coal seam is the main mining coal seam to achieve high yield and high efficiency in my country, and the mining technology level of the extra-thick coal seam determines the scientific and technological progress and the improvement of the 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 mine safety production, but also directly restricts the improvement of the unit yield level of the fully mechanized mining face; among them, the basis for realizing the rapid retraction of the fully mechanized mining...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21D9/14
Inventor 刘锋珍陈军李长磊
Owner 中泰德恒(北京)矿业科技有限公司
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