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Method for building middle-thickness coal-bed gob-side entry roadside support body supported by gangue

A technology of thick coal seam and support body, which is applied in the directions of earthwork drilling, filling, safety devices, etc., can solve the problems of closed goaf, prevent insufficient air leakage, etc., to reduce the deformation of the roadway, the process is simple, and easy to master Effect

Inactive Publication Date: 2017-11-24
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent application number is: 201610335849.3, which discloses "a method for retaining roadways along the goaf in medium-thick coal seams", which provides a new method for retaining roadways, but it still has shortcomings in sealing gobs and preventing air leakage

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  • Method for building middle-thickness coal-bed gob-side entry roadside support body supported by gangue
  • Method for building middle-thickness coal-bed gob-side entry roadside support body supported by gangue
  • Method for building middle-thickness coal-bed gob-side entry roadside support body supported by gangue

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0023] The method for constructing the side support body of the medium-thick coal seam gobside retaining roadway supported by gangue of the present invention, the specific steps are as follows:

[0024] a. When excavating the wide roadway 13 of the first working face, the width of the roadway reused by the adjacent working face 14 is 0.5-1.0m wider, and the anchor net cable is used for support;

[0025] b. Change all or part of the support of the working face to the support of the long tail beam for caving coal, and arrange scraper conveyors, reloading crushers, belt conveyors and lifting conveyors under the support of the long tail beam for caving coal; During mining, the gangue falling from the back of the working face of the caving long tail beam support is transported to the reloading crusher through the scraper conveyor, and after being crushed, ...

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Abstract

The invention relates to a method for building a middle-thickness coal-bed gob-side entry roadside support body supported by gangue, which belongs to the field of coal mine support. The method mainly comprises the following steps: (1) tunneling a working face roadway which is 0.5 to 1.0 m wider than a complexing roadway; (2) changing a working face support portion to be a top coal caving long tail beam support, arranging a scraper conveyor, a transport crushing machine, a belt conveyor and a downward conveyor behind a working face, and throwing gangue dropped when in backstopping of the working face to a position of an end of the working face; (3) before the gangue is piled, previously adopting a wooden pillar and a reinforcing mesh along the edge of the original roadway to protect the roadway; (4) building a narrow filling body behind the working face; and (5) repeating the steps (1) to (4) to form a continuous roadside support body which is used by a next working face. By adopting the method, the deflection of a roof can be reduced, the supporting force of the gangue at the gob side for the roof can be increased, and the roadway maintaining effect can be improved; and the consumption of the filling materials can be saved, and the roadway cost and the labor intensity of workers can be reduced.

Description

technical field [0001] The invention relates to the technical field of gob-side entry retaining in underground mines, in particular to a method for constructing side-side support of gob-side entry retaining in medium-thick coal seams where gangue is used to support the roof. Background technique [0002] Gobside retaining means that during the mining process of this working face, a roadway is retained as the next working face by adopting reasonable roadway support technology and roadside support technology (gangue, concrete, high-water materials, dense pillars, etc.) In normal use, it has the advantages of improving resource recovery rate, alleviating the tension of mining replacement, and providing space for gas control. However, due to the fact that the gob-side retaining needs to withstand multiple mining impacts, especially the breaking, rotation and sinking of the roof, the roadway usually has a large deformation. How to use gangue in the goaf to support the roof, redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F15/00
CPCE21C41/18E21F15/00
Inventor 杨玉贵高峰程红梅朱明政张志镇高亚楠刘娟
Owner CHINA UNIV OF MINING & TECH
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