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A Air Leakage Prevention Technology by Leaving a Narrow Coal Pillar

A narrow coal pillar and anti-air leakage technology, which is applied in dust prevention, mining equipment, fire prevention, etc., can solve the problems of narrow coal pillar air leakage and other problems, and achieve the advantages of long manual operation safety distance, safe and reliable construction, and rapid increase in tensile strength Effect

Active Publication Date: 2021-03-02
SHAANXI COAL & CHEM TECH INST
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a narrow coal pillar air leakage prevention process with low cost, easy operation and strong applicability to solve the problem of air leakage caused by roadway deformation after narrow coal pillars are left.

Method used

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  • A Air Leakage Prevention Technology by Leaving a Narrow Coal Pillar
  • A Air Leakage Prevention Technology by Leaving a Narrow Coal Pillar

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0026] see figure 1 and figure 2 , an air leakage prevention process for leaving a narrow coal pillar, comprising the following steps:

[0027] Step 1: According to the cross-sectional size of the narrow coal pillars, cut a number of sheet fireproof materials, the sheet fireproof materials are fireproof cloth or fireproof asbestos net; the height of the cut sheet fireproof material is at least greater than that of the narrow coal pillars. Height 40cm.

[0028] Step 2: Lay the cut sheet-like fireproof material flat, and pre-spray to make air-leakage-proof prefabricated fireproof material;

[0029] Step 3: After the anti-leakage prefabricated fireproof material is air-dried and formed, it is laid on the narrow coal pillar through the anchor rod. The longitudinal direction is required to be more than 20cm above and below, and the remaining part is fixed on the top an...

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Abstract

The invention discloses an air leakage prevention process for leaving narrow coal pillars. Firstly, according to the section size of the narrow coal pillars, a number of sheet fireproof materials are cut; then the cut sheet fireproof materials are laid flat and pre-sprayed , to make anti-leakage prefabricated fireproof materials; after the air-dried prefabricated fireproof materials are air-dried and formed, they are laid on the narrow coal pillars; The invention has the advantages of low cost, simple operation and wide application range.

Description

technical field [0001] The invention relates to the technical field of mine safety, in particular to an air-leakage prevention technology for leaving narrow coal pillars. Background technique [0002] Leaving coal pillars in my country has always been a traditional roadway protection method in coal mines to solve problems such as roadside support, air leakage and spontaneous combustion in goafs, gas disasters, and alleviation of mining replacement tension. [0003] The wide coal pillars left between the working faces of the sections cause waste of resources, the coal recovery rate is low, and the service life of the mine is reduced. The high concentrated support pressure causes the dynamic pressure to appear when the adjacent coal seam is mined, the maintenance of the roadway is difficult, and the support cost is high; and the large coal pillar left in the goaf is prone to spontaneous ignition; at the same time, the large coal pillar forms a stress concentration zone, causin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/00E21C41/18B05B9/04B05D1/02B05D3/04
CPCB05B9/04B05D1/02B05D3/0406E21C41/18E21F5/00
Inventor 黄克军宋超王苏健邓增社王鹏赵萌烨黄欣李亮刘文静金声尧吴学明
Owner SHAANXI COAL & CHEM TECH INST
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