Method for recovery of room-type coal pillar through loess filling

A coal mining method and coal pillar technology, which are applied in the fields of backfill, earthwork drilling, safety devices, etc., can solve the problems of increasing the stress concentration factor of coal pillars, low recovery rate, mechanization degree, and endangering the life safety of personnel, etc. The effect of reducing the impact, solving the huge waste of resources and simple methods

Active Publication Date: 2014-01-22
CHINA UNIV OF MINING & TECH
View PDF4 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a number of recovery methods for coal pillars left by room mining have been formed at home and abroad, but they have the disadvantages of low recovery rate and degree of mechanization. In addition, after the recovery of coal pillars, the

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 recovery of room-type coal pillar through loess filling
  • Method for recovery of room-type coal pillar through loess filling
  • Method for recovery of room-type coal pillar through loess filling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0024] (1) The first mining working face of a certain mine is located on the southwest side of the three-panel area. Along the direction perpendicular to the section roadway 1, a mining working face is arranged for every two adjacent columns of coal pillars. The mining height of the working face is 4.5m, and the working face The strike length is 120m, the inclination length is 40m, and a column of coal pillars is reserved between adjacent mining faces as the separation wall 2, such as figure 1 shown;

[0025] (2) Along the direction perpendicular to the section roadway 1, the first row of mined coal houses on the left side of the separation wall is used as the coal transportation lane 12, and the second row of coal mining houses is used as the material transportation roadway 13;

[0026] (3) Arrange bulldozers 5, ZL5FB mining tire explosion-proof loaders 6...

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 recovery of a room-type coal pillar through loess filling. Along the vertical section laneway direction, formed channels in mined coal rooms are taken as an arrangement form of coal transport lanes and material transport lanes; two adjacent coal pillars are arranged to be a stope face, a row of coal pillars are retained between adjacent stope faces as a partition wall; The recovery of coal pillars employs a blasting technology, loess of ground is taken as a filling material of mined-out area, the backfill of the mined-out area is carried out through a way of cooperation operation of high-speed power throwing machines and bulldozers, A room-type remaining coal pillar is replaced by a compact loess filling body for supporting the mined-out area roof. The method recovers precious coal resource, lowers great resource waste caused by room-type mining, and provides a new technical approach for mines with similar conditions in our country.

Description

technical field [0001] The invention relates to a method for recovering a room-type coal pillar, in particular to a method suitable for filling and recovering a room-type coal pillar with loess with a width of 8-12 m left over from coal mining in a coal mine. Background technique [0002] Many mining areas such as the Ordos Coal Basin and the Shenfu Coalfield in my country have been using the room-type coal mining method for a long time. The biggest disadvantage of this method is that only the coal mining room is used, and no coal pillars are used. According to incomplete statistics, the resource recovery rate only accounts for 36-40% of the 11 billion tons of recoverable reserves in the Ordos area, and about 6.6-7 billion tons of coal resources are discarded underground, resulting in sluggish coal volume, resulting in an extreme shortage of precious resources in the country. Big waste. On the other hand, with the high-intensity mining of coal resources, many mines are faci...

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): E21C41/16E21F15/06
Inventor 张吉雄姜海强黄艳利周楠李猛孙强
Owner CHINA UNIV OF MINING & TECH
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