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Sloughing prevention and control method for large mining height coal wall

A control method and a technology of large mining height, applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve problems such as personal casualties, defects, and threats to coal mine safety, and achieve reduction of coal wall spalling, improvement of strength, and good The effect of protection

Active Publication Date: 2016-08-31
NORTH CHINA INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two often occur at the same time. Once the roof falls, it often causes personal casualties and greatly threatens the safety of coal mining.
Although these prevention and control m

Method used

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  • Sloughing prevention and control method for large mining height coal wall

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see figure 1 , the present invention provides a technical solution: a method for prevention and control of large mining height coal wall slabs, characterized in that it includes the following steps:

[0022] (1) Use the hydraulic support to support the direct roof and the old roof above the coal seam. The specific support method is: when the hydraulic support is used to support the direct roof 7 and the old roof 8 above the coal seam, the hydraulic supp...

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Abstract

The invention discloses a sloughing prevention and control method for a large mining height coal wall. By means of the sloughing prevention and control method, the coal wall can be better protected and supported. The coal wall and a roadway are supported through a hydraulic supporting frame, various grouting drilling holes are formed in a coal seam, and the coal seam is grouted and anchored with force from different angles, so that the phenomena that the coal seal is deformed under pressure, the coal wall is damaged, and then sloughing occurs are effectively prevented. The grouting drilling holes in different directions are formed at different coal seam heights, and the occurrence of sloughing caused by breakage of coal blocks and rocks in each seam is prevented. The grouting drilling holes in the coal wall can interact with each other at the same time, each coal seam is protected and supported, the strength of the whole coal seam is improved, and the occurrence probability of sloughing of the coal wall is lowered.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a prevention and control method for large mining height coal wall spalling. Background technique [0002] Compared with layered mining, fully mechanized mining with large mining height has the advantages of large production capacity, high per unit yield, simple roadway layout and process, small roadway excavation and maintenance, high mining efficiency and coal resource recovery rate, and less equipment relocation times and saving false roof materials; compared with caving coal mining, fully mechanized mining with large mining height has the advantages of reduced procedures, high recovery rate of coal resources, less grinding rate and less coal dust at the mining face, etc., fully mechanized mining with large mining height It is one of the main development directions for mining gently inclined thick coal seams in my country, and it is also one of the main coal ...

Claims

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Application Information

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IPC IPC(8): E21D19/00E21D20/02E21D15/44E21C41/18
CPCE21C41/18E21D15/44E21D19/00E21D20/003E21D20/02
Inventor 殷帅峰高文蛟
Owner NORTH CHINA INST OF SCI & TECH