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Exploiting method for working face to pass through cross and complex small coalpit tunnels

A technology for working faces and coal kilns, which is applied in tunnels, ground mining, earthwork drilling and mining, etc. It can solve problems such as insufficient reinforcement of the front coal wall, restrictions on safe production, and roof fall at the working face, so as to improve roof conditions, prevent roof fall accidents, The effect of enhancing the strength of the coal wall

Active Publication Date: 2016-06-15
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, due to improper adjustment distance of the working face and ignoring the influence of mining height and advancing speed when the roadway of the small coal kiln is passed, the working face will often cause serious roof fall near the small coal kiln and damage the support
At the same time, the reinforcement of the coal wall in front is insufficient, resulting in serious local fragmentation of the working face, which restricts safe production

Method used

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  • Exploiting method for working face to pass through cross and complex small coalpit tunnels
  • Exploiting method for working face to pass through cross and complex small coalpit tunnels
  • Exploiting method for working face to pass through cross and complex small coalpit tunnels

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Experimental program
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Effect test

specific Embodiment approach

[0013] The working face of the present invention crosses the complex small coal kiln roadway mining method, and its preferred specific implementation mode is:

[0014] Artificially adjust the layout direction of the working surface according to the following steps:

[0015] A. Start to adjust the layout direction at a distance of 30m from the small coal kiln, the tail of the machine is advanced, the tail is multi-top scraper conveyor, and the head does not top the scraper conveyor;

[0016] B. The nose and tail of the machine are pushed forward at the same time, but the nose of the machine is pushed forward, so that the layout direction of the working surface is changed again;

[0017] C. When the small coal kiln is about to be exposed, the working face is adjusted, and the expansion bolt is driven to the coal wall.

[0018] Lower the mining height near the small coal kiln, cut coal with the top, and insert the plate at the base if there is a separation layer at the base of t...

specific Embodiment

[0022] Such as Figure 1 to Figure 2c shown, including steps:

[0023] 1. Artificially adjust the layout direction of the working surface:

[0024] ① Adjust the layout direction at a distance of about 30m from the small coal kiln. The tail of the machine is advanced, and the tail of the machine is multi-topped with scraper conveyors, and the head of the machine is not topped with scraper conveyors.

[0025] ②Then the nose and tail of the machine are pushed forward at the same time, but the nose is pushed forward, so that the layout direction of the working surface is changed again.

[0026] ③Advance to the time when the small coal kiln is about to be exposed, and the working face is adjusted. And hit the expansion bolt to the coal wall.

[0027] 2. In the vicinity of small coal kilns, the mining height should be appropriately reduced, and the coal should be cut at the top. If there is a separation layer at the base of the support, you can insert a plate at the base.

[002...

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Abstract

The invention discloses an exploiting method for a working face to pass through cross and complex small coalpit tunnels. An arrangement direction of the working face is adjusted manually according to the following steps: the arrangement direction is adjusted 30 meters away from the small coalpit, a tail propels in advance, the tail supports scraper conveyers, and a head does not support scraper conveyers; the head and the tail propel simultaneously, but the head propels in advance, so that the arrangement direction of the working face is changed again; when the small coalpit is nearly exposed during propelling, the working face is leveled, an expansion anchor pole is anchored to a coal wall. The method can effectively prevent generation of roof fall accidents near the small coalpit, so that production inconvenience due to working face coal wall caving is eliminated. Safety and high efficiency of production environment on the working face which passes through the small coalpit is guaranteed.

Description

technical field [0001] The invention relates to a mining method of a small coal kiln, in particular to a mining method of a roadway in a small coal kiln with complex intersections on the working face. Background technique [0002] At present, due to factors such as improper adjustment distance of the working face and ignoring the influence of mining height and advancing speed when the roadway of the small coal kiln is passed, the working face will often cause serious roof fall near the small coal kiln and damage the support. At the same time, the reinforcement of the front coal wall is insufficient, resulting in serious local fragmentation of the working face, which restricts safe production. Contents of the invention [0003] The purpose of the present invention is to provide a high-efficiency and high-safety mining method for small coal kiln roadways with complex intersections. [0004] The purpose of the present invention is achieved through the following technical sol...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21D9/14E21D20/00
CPCE21C41/16E21D9/14E21D20/00
Inventor 李杨张康宁赵伟朱恩光李明皓
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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