Safe and efficient mining method for segmented medium-length hole stope

A mining method and deep hole technology, applied in surface mining, mining equipment, underground mining, etc., can solve the problems of roof blasting, inaccurate blasting position, and inability to effectively collapse suspended roofs, etc., to improve utilization, improve Mining efficiency, the effect of reducing the number of blasts and firing time

Active Publication Date: 2021-11-05
CHINA MINMETALS CHANGSHA MINING RES INST
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this patent can only be applied under the condition that the normal row surface has the construction treatment of the suspended roof blast hole. If the normal row surface of the suspended roof can no longer construct the blast hole, then thi

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
  • Safe and efficient mining method for segmented medium-length hole stope
  • Safe and efficient mining method for segmented medium-length hole stope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see Figure 1-Figure 2 As shown, a kind of safe and efficient mining method of segmented deep hole stope of the present invention first divides the ore body to be exploited into panels, at least three segmented stopes in the panel stope, and each subsection in the panel area Excavate parallel rock-drilling roadways in the section stope, and begin to carry out the mining of the deep-hole stope 1 in one step to the rock-drilling roadway in the middle stope. When a suspended roof 12 appears in the deep hole stope 1 in a step of mining, three-dimensional scanning technology is used to measure, so as to determine the position and occurrence status of the suspended roof 12 . Then, in the left and right adjacent stope rock drilling roadways of the deep hole stope 1 in a step (respectively being the rock drilling roadway 21 of the left side stope 2, the rock drilling roadway 31 of the right side stope 3), to a step A medium-deep hole blasthole is constructed above the position...

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 provides a safe and efficient mining method for a segmented medium-length hole stope. The method comprises the steps that an ore body to be mined is divided into segmented stopes and mined step by step, when a hanging roof occurs in the mining process, medium-length hole blast holes are constructed in rock drilling roadways of the left and right adjacent stopes to the hanging roof area for millisecond blasting treatment, continuous deterioration of the normal row face blasting hanging roof condition is avoided, and smooth proceeding of medium-length hole stope mining operation is guaranteed. The medium-length hole blast hole charging part is the range with the hanging roof in the medium-length hole stope in one step, the charging method can achieve efficient and accurate blasting of the hanging roof, waste of explosives cannot be caused, and the stability of the ore body and surrounding rock mass in the adjacent stopes is not affected. According to the method, timely treatment can be carried out when the hanging roof occurs in the segmented medium-length hole stope, the method has the advantages of being accurate in blasting, high in construction efficiency and low in cost, the ore loss rate can be effectively reduced, the ore crushing quality can be improved, and a guarantee is provided for efficient and safe operation of subsequent normal row face blasting engineering of the stope.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a safe and efficient mining method for sectioned medium and deep hole stopes. Background technique [0002] In the mining project, when the stope is subjected to normal surface blasting, as the mining progresses, the top of the stope will be affected by factors such as the construction length of the medium and deep hole blastholes and insufficient charge density, resulting in a suspended roof in the stope. An arched shape is formed at the top of the stope. If there is a suspended roof in the mining blasting, it will cause insufficient blasting compensation space and cannot provide the free surface required for the mining blasting, resulting in insufficient subsequent mining blasting height, which will affect the normal production of the mine stope. Suspended roof blasting can usually account for 10-20% of the total blasting volume. If it is not dealt with in time, the suspended r...

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
IPC IPC(8): E21C41/22E21F15/00F42D3/00F42D1/00
CPCE21C41/22E21F15/00F42D3/00F42D1/00
Inventor 王亚军朱青凌张海云李向东李强盛佳李伟明李晓辉王玉丁
Owner CHINA MINMETALS CHANGSHA MINING RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap