Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of Pre-splitting Roof of Multi-point Dispersed Parallel Blasthole in Fully Mechanized Mining Face

A technology for fully mechanized mining face and working face, which is applied in drilling equipment and methods, earthwork drilling, drilling with explosives, etc. The effect of impact range, reduction of suspended ceiling area, and reduction of sticking phenomenon

Active Publication Date: 2020-01-10
XINJIANG GUICI MINING IND CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 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 area of ​​the suspended roof is large, and the shock wave accompanying the collapse will cause great harm to the workers and mechanical equipment on the working face. When the roof collapses in a large area, the dust, toxic and harmful gases will be raised. prone to accidents

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of Pre-splitting Roof of Multi-point Dispersed Parallel Blasthole in Fully Mechanized Mining Face
  • Method of Pre-splitting Roof of Multi-point Dispersed Parallel Blasthole in Fully Mechanized Mining Face
  • Method of Pre-splitting Roof of Multi-point Dispersed Parallel Blasthole in Fully Mechanized Mining Face

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com