Method for forming covering layer by stope caving method

A technology for caving mining and overburden, applied in the field of underground mine mining, can solve the problems of high cost and low technical efficiency, and achieve the effects of large blasting block, reducing dilution loss and improving rock drilling efficiency.

Inactive Publication Date: 2015-03-04
CHINA MINMETALS CHANGSHA MINING RES INST
View PDF11 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of low efficiency and high cost of the existing overburden formation technology of the caving method, and provide a method for forming overburden while mining

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 for forming covering layer by stope caving method
  • Method for forming covering layer by stope caving method
  • Method for forming covering layer by stope caving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The following is a detailed description by taking the sub-level caving mining method without pillars as an example. Such as Figure 1~3 As shown, when the caving method is used for mining, the upper part is the top wall surrounding rock 1, and the lower part is the ore body 2, and the two are separated by the ore-rock boundary line 3. The mining roadway is arranged in the ore body, and its section height can be consistent with other section heights. Adopting the method for forming the covering layer of the present invention directly utilizes the rock drilling roadway required for mining in the first section to drill upward fan-shaped middle-deep holes, super-deep on the basis of mining blast holes, and blasts simultaneously with the mining in the first section.

[0025] The specific method is: drill upward fan-shaped blastholes 5 in the rock drilling roadway 4 of the first section, and part of the blastholes extend to the surrounding rock of the roof and exceed the bou...

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 forming a covering layer by a stope caving method. During the first sublevel stoping under top wall rock, a rock drilling roadway required by the first sublevel stoping is used for drilling an upward fan-shaped medium-depth hole; the stoped upward fan-shaped blast hole is drilled to an ultra-deep state into the top wall rock; the blast hole is totally filled with explosives in the full length; the full length of the blast hole is blasted in one step; the first sublevel ore and the upper top wall rock are simultaneously blasted into fragments; and after the blasting, ores are positioned at the lower part, and waste stones are positioned at the upper part. When the method provided by the invention is used, the new tunneling caving engineering is not needed; the cost and the time are reduced; the yield of a stoping field is favorably improved; the installing time of a newly drilled blast hole drilling machine is reduced; the integral rock drilling efficiency is improved; and blocky structures of the waste stones are favorable for ground pressure management and depletion loss reduction.

Description

[0001] technical field [0002] The invention relates to an underground mine mining technology, in particular to a method for forming an overburden in a caving mining method. Background technique [0003] The caving mining method generally draws ore under the overburden (ore) rock, therefore, the formation of the initial overburden is a necessary condition for mining such as the segmented caving method without pillars, the segmented caving method with pillars, and the stage caving method. The thickness of the covering layer should be greater than the section height, generally 15-20m. [0004] The 1188th page of " Mining Design Handbook " Mining Deposit Mining Volume II, published by China Building Industry Press in December, 1987 has introduced 4 kinds of methods for the formation of overburden. 1) Natural caving method: when the top plate is unstable, natural caving is used to form a covering layer, which can be supplemented by a small amount of blasting treatment; 2) Arti...

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 Applications(China)
IPC IPC(8): E21C41/16
CPCE21C41/16F42D3/04
Inventor 周爱民柳小胜宋嘉栋
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