Method for pre-splitting of roof through multipoint dispersed parallel-type blastholes in fully mechanized mining face

A fully-mechanized mining face and face technology, which is applied to drilling equipment and methods, earthwork drilling, and drilling using explosives, etc., can solve the problems of long drilling time, large suspended roof area, and labor-intensive, etc., and achieve reduction The effect of impact range, reduction of overhang area, and reduction of stuck pipe phenomenon

Active Publication Date: 2018-07-06
XINJIANG GUICI MINING IND CO LTD
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Problems solved by technology

[0002] After the installation of the fully-mechanized caving face, the initial mining and laying shall be carried out. According to the past experience and methods, in order to ensure the smooth initial caving of the working face, it is necessary to arrange multiple groups of deep hole blastholes in the upper and lower grooves to the side of the working face. Accompanied by the advancing process of the working face to achieve the purpose of pre-splitting the roof in advance and making the roof collapse smoo

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  • Method for pre-splitting of roof through multipoint dispersed parallel-type blastholes in fully mechanized mining face
  • Method for pre-splitting of roof through multipoint dispersed parallel-type blastholes in fully mechanized mining face
  • Method for pre-splitting of roof through multipoint dispersed parallel-type blastholes in fully mechanized mining face

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] as attached figure 1 to attach image 3 As shown, the method for multi-point scattered parallel blasthole pre-splitting roof in fully mechanized mining face includes the following steps:

[0025] Step 1: Determine the drilling rig support angle according to the maximum and minimum mining height of the bracket installed in the cutting hole, and determine the blasthole final hole depth, angle, blasthole spacing and number of blastholes according to the roof lithology;

[0026] Step 2: Drilling blastholes in the cutting hole of the coal mining face, the distance between the blastholes is set between the mining side coal wall and the coal wall of the working face, and the blastholes are inclined to the roof of the working face and parallel to the working face. Blast holes are evenly drilled at equal intervals along the cutting direction of the working face;

[00...

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Abstract

The invention discloses a method for pre-splitting of a roof through multipoint dispersed parallel-type blastholes in a fully mechanized mining face. The supporting angle of a drilling machine is determined on site according to the maximum mining height and the minimum mining height of a support mounted in a cutting hole, and the final hole depths and angles of the blastholes, the interval of theblastholes and the number of the blastholes are determined according to lithological characters of the roof; and the blastholes are drilled in an upper gate road and a lower gate road, and the roof ispre-split through the dispersed parallel-type blastholes. According to the method for advance pre-splitting of the mining face roof through the multipoint dispersed parallel-type blastholes in the fully mechanized mining face, complete caving of the roof is facilitated, the caving impact range of the suspended roof is shortened to the maximum extent, and the roof caving efficiency is improved.

Description

technical field [0001] The invention belongs to the field of coal mining, and in particular relates to a method for pre-splitting a roof of multi-point scattered parallel blastholes in a fully mechanized mining face. Background technique [0002] After the installation of the fully-mechanized caving face, the initial mining and laying shall be carried out. According to the past experience and methods, in order to ensure the smooth initial caving of the working face, it is necessary to arrange multiple groups of deep hole blastholes in the upper and lower grooves to the side of the working face. Accompanied by the advancing process of the working face to achieve the purpose of pre-splitting the roof in advance and making the roof collapse smoothly, but this method takes a long time to drill holes, consumes more manpower, material resources, and man-hours, and the comprehensive pre-splitting effect is not good. When the roof is about 30-40m away, the roof will collapse. The ar...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B10/43E21B10/54
CPCE21B7/007E21B10/43E21B10/54
Inventor 龚翰林李峰孟凡林曹瑞朋刘宏亮王梦亚胡贝贝
Owner XINJIANG GUICI MINING IND CO LTD
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