Support method for fully-mechanized coal mining face full-negative-pressure withdrawing channel

A fully-mechanized mining face and retraction channel technology, which is applied in the field of retraction channel support, can solve problems such as tail lane channel blockage, poor anti-push capability, and complicated procedures, so as to reduce labor intensity, improve racking efficiency, and economical The effect of out-of-shelf mode

Inactive Publication Date: 2015-12-09
TIANDI SCI & TECH CO LTD +2
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Problems solved by technology

[0005] In the past, the retreat channel was mostly maintained by wooden piles. There were a series of problems such as high construction labor intensity, complicated process, and unreasonable support methods. Due to the compressibility of wooden piles, the anti-thrust ability was poor. If the top plate is under heavy pressure, it may cause the wooden pile to

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  • Support method for fully-mechanized coal mining face full-negative-pressure withdrawing channel
  • Support method for fully-mechanized coal mining face full-negative-pressure withdrawing channel
  • Support method for fully-mechanized coal mining face full-negative-pressure withdrawing channel

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Embodiment Construction

[0019] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] A full negative pressure retraction channel support method for a fully mechanized mining face in a high-gas mine. After the final mining of the fully mechanized mining face is completed, the coal mining machine 1 is used to cut coal to form a self-drilling retraction channel, such as figure 1 As shown, the cutting distance of each shearer is 800mm, then the shearer can cut coal with three cuts to form the width of the retraction channel, and support it with high-strength bolts (cables), and cancel the cover frame. The way of retaining the wooden piles is to use one-time support to realize full negative pressure ventilation during the removal of the racks.

[0021] The section size of the withdrawal channel is 2400×2800mm; after the withdrawal channel is formed, the specific support plan is as follows:

[0022] Such as figure 2...

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Abstract

The invention relates to the technical field of mining engineering, in particular to a support method for a withdrawing channel. The support method achieves full-negative-pressure ventilation during highly gassy mine fully mechanized coal mining face support withdrawing. After lasting mining of a fully mechanized coal mining face is ended, the self-excavation withdrawing channel is formed through coal cutting of a coal cutter, high-strength anchor rod (cable) support is performed on the withdrawing channel, the roadway retaining mode of driving nogs behind a sheltering frame is omitted, and one-off support is utilized for achieving full-negative-pressure ventilation during support withdrawing. According to the top plate structure of the withdrawing channel, the method of high-pre-stress anchor rod (cable) support is adopted for surrounding rock control. Anchor rods (cables) are adopted for supporting the withdrawing channel in a cantilever mode, nog construction in a traditional support withdrawing mode is basically eliminated, and support strength can meet the requirement for a ventilation section in full-negative-pressure support withdrawing. Through innovating the full-negative-pressure withdrawing channel support mode, the labor intensity is lowered to the maximum degree, the support withdrawing efficiency is improved to the maximum degree, and finally the safe, efficient and economical support withdrawing mode is achieved.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for supporting a retraction passage that realizes full negative pressure ventilation during the withdrawal of a fully mechanized mining face in a high-gas mine. Background technique [0002] Shanxi Coal Group 15 # The coal roof is K with an average thickness of 10m 2 Limestone, this layer of rock is dense and hard, with very high integrity and strength. After the final mining of the fully mechanized mining face, the self-drilling retraction channel was formed by cutting coal with the shearer. During the withdrawal period, the following two ventilation methods were used: [0003] 1. Partial ventilation, using local fans to supply air to the frame, and the roof behind the protective frame will naturally collapse. With the horizontal extension of mining, the absolute amount of gas gushing out in local areas of mines increases, and the air supply mode of local ...

Claims

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Application Information

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IPC IPC(8): E21D20/00E21D11/15E21F17/00
Inventor 孙志勇王俊杰李永浍张镇曹建波马志刚宋强军郭相平申培文王明
Owner TIANDI SCI & TECH CO LTD
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