Coal mine gob-side entry retaining side supporting method

A technology for coal mines and goafs, applied in mining equipment, earthwork drilling, shaft lining, etc., can solve problems such as difficulty in recovery of single columns, failure of single columns, material loss, etc., to shorten moving time and increase recovery rate , the effect of reducing difficulty

Inactive Publication Date: 2014-04-30
BEIJING HAOHUA ENERGY RESOURCE
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Gobside retaining is used along the trough of the working face. According to past experience, single hydraulic props are used for intensive support of gobside retaining. A large number of single columns are required. These single pillars are difficult to recover, and they are difficult to recover. At this time, many single columns have failed or damaged, resulting in a large amount of material loss

Method used

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  • Coal mine gob-side entry retaining side supporting method
  • Coal mine gob-side entry retaining side supporting method
  • Coal mine gob-side entry retaining side supporting method

Examples

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Embodiment Construction

[0020] The following implementations are used to illustrate the present invention, but not to limit the scope of the present invention.

[0021] see figure 1 -4, the present invention includes the following steps:

[0022] (1) Firstly, dense single hydraulic props 1 are adopted beside the gob-side retaining alley. The dense single hydraulic props include vertical single hydraulic props 11 and inclined single hydraulic props 12, and the gap between the inclined single hydraulic props 12 and the roof Connect with the hinged top beam 4 to make the single hydraulic prop contact with the roof of the roadway more smoothly;

[0023] (2) After the goaf is cut and the roof is directly collapsed, on the basis of the original support of 3 anchor rods, the roof of the gob-side retaining entry is started to be supported by 2 anchor cables. The retaining entry is supported by inclined double-row anchor cables. The spacing is 2m, the row spacing is 2.2m, the selected anchor cable length is...

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Abstract

The invention discloses a coal mine gob-side entry retaining side supporting method. The coal mine gob-side entry retaining side supporting method comprises the following steps of supporting the coal mine gob-side entry retaining side through intensive individual hydraulic supporting columns; constructing anchor cable supports for the gob-side entry retaining top plates based on the original rocker bolt supports, enabling the gob-side entry retaining to adopt double-line rocker bolt supports, enabling the distance between the rocker bolts to be 2 m and the row distance to be 2.2 m and enabling the anchor bolts which are close to one side of the coal wall to be installed along a certain inclination angle and the anchor bolts which are close to one side of a gob to be installed perpendicular to the top plates; constructing a row of single hydraulic supporting columns on the inner side of the intensive single hydraulic supporting columns after the designed pretress of the anchor bolts is achieved and enabling the column distance to be 1.2 to 1.5 m; enabling the insensitive single hydraulic supporting columns to be out successively from back to front and enabling supplement single hydraulic supporting columns and the installed anchor bolts to be formed into a gob-side entry retaining side auxiliary supporting system. The coal mine gob-side entry retaining side supporting method solves the problem that the gob-side entry retaining side supporting is difficult.

Description

technical field [0001] The invention relates to a supporting method. In particular, it relates to a roadside support method for gob-side entry retention in coal mines. Background technique [0002] Gobside retaining is used along the trough of the working face. According to past experience, single hydraulic props are used for intensive support of gobside retaining. A large number of single columns are required. These single pillars are difficult to recover, and they are difficult to recover. At that time, many single columns have failed or damaged, resulting in a large amount of material loss. Contents of the invention [0003] The purpose of the present invention is to provide a method for solving the difficulty of retaining support in gob-side entry in coal mines. [0004] In order to achieve the above object, the present invention has the following technical solutions: [0005] The present invention is a coal mine gobside retaining roadside support method, which is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00
Inventor 张伟相啸宇马植胜蔡来生李忠学王忠武陈宫刘鹏程张爽
Owner BEIJING HAOHUA ENERGY RESOURCE
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