Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode

A technology for coal mine tunnels and working faces, which is applied to surface mining, mining equipment, underground mining, etc., can solve the problems of shutdown of working faces, poor applicability, and influence on the progress of working faces, coal mine production, etc., so as to reduce roof pressure and reduce The effect of supporting strength and shortening the time spent

Active Publication Date: 2013-08-14
旭辰矿业科技发展(徐州)有限公司
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Problems solved by technology

Although the equal pressure method adopted in this patent can alleviate the appearance of mine pressure to a certain extent, the equal pressure time given is a summary of experience. It is not very applicable to...

Method used

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  • Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode
  • Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode
  • Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode

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Embodiment Construction

[0020] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The method for implementing a kind of working face of the present invention forcibly caving the top and unloading the pressure to go through the gob is to mine No. 3 coal seam at the fully mechanized mining face of Shanxi Coal Mine, and the mining height of the coal seam is 1.56m. The immediate roof is mudstone, with an average thickness of 4.8m; the basic roof is fine-grained sandstone, with an average thickness of 12.1m, and the sandstone is dense and hard, with a broken expansion coefficient =1.2.

[0022] The steps of the specific implementation method are as follows:

[0023] Step 1. During the excavation process of the coal mine underground roadway, when the working face is 10-20m away from the roadway in advance, press the spacing on the roof of the roadway Set up a number of blastholes, and arrange several blastholes in th...

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Abstract

The invention discloses a method for a coal mine tunnel working surface to pass through an abandoned roadway in a forced caving pressure relief mode. According to the method, in the process of advancing towards the abandoned roadway at the working surface, a row of blast holes with certain angles and depths are formed in the abandoned roadway ahead the working surface towards the coal wall direction of the working surface in advance, the completeness of a top board rock layer is damaged by adopting a deep hole presplitting method, and when the working surface passes through the abandoned roadway, a top board behind a bracket can collapse in time and fill a worked out section. By utilizing the method, the hidden danger that a large-area hanging arch occurs in back of the bracket when the working surface passes through the abandoned roadway is avoided, so that the purposes that the influence of the top board pressure to the working surface and the abandoned roadway ahead is reduced, and the working surface can safely and rapidly pass through the abandoned roadway are achieved. The method is simple and effective to operate and low in cost, and has great practical and popularization values.

Description

technical field [0001] The invention relates to a method for roof caving and pressure relief of the working face to pass through the gob, in particular to a method for advancing the working face to the gob by arranging a certain angle and depth in advance in the gob ahead of the working face toward the coal wall of the working face For blastholes, deep hole pre-splitting is used to artificially cut off the lower roof stratum of the coal seam. After the working face is pushed through, the roof behind the support collapses and fills the goaf, so as to reduce the pressure on the surrounding rock of the working face and the goaf in front. technical background [0002] The main problem when the working face passes through the gob is that the exposed roof area of ​​the working face is too large, and the surrounding rock pressure is high, which can easily lead to a large area of ​​roof caving and accidents of coal wall slabs. At the same time, it will be crushed or even crushed to d...

Claims

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Application Information

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IPC IPC(8): E21F15/00F42D3/00E21C41/16
Inventor 张百胜姜精鹏常选斌田龙张帅张育伟刘臻保李亚鹏张世武
Owner 旭辰矿业科技发展(徐州)有限公司
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