Application of Coal Pillarless Coal Mining Method in Lower Protective Layer Mining

A protection layer, no coal pillar technology, applied in surface mining, mining equipment, earthwork drilling and other directions, can solve the problem of difficult to fully and continuously relieve pressure, and achieve the effect of sufficient mining, widening the scope of application, and economical mining.

Active Publication Date: 2015-08-12
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide an application of a coal pillarless coal mining method in the mining of the lower protective layer, so as to solve the problem that the protected layer is difficult to fully and continuously relieve pressure when mining the lower protective layer, and realize the safe mining of the protected layer

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
  • Application of Coal Pillarless Coal Mining Method in Lower Protective Layer Mining
  • Application of Coal Pillarless Coal Mining Method in Lower Protective Layer Mining
  • Application of Coal Pillarless Coal Mining Method in Lower Protective Layer Mining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be described in detail below by taking the practical application of the method of the present invention in coal production as an example. However, those skilled in the art should realize that the present invention is not limited thereby.

[0027] For the mining of the lower protective layer, it can be considered that the application effect of the lower protective layer mainly depends on the position of the upper protected layer in the "three zones": the protected layer cannot be located in the collapse zone; when the protected layer is located in the middle and lower part of the fracture zone , in the area where the mining fractures are developed, the gas permeability of the coal seam is good; when the protected layer is located in the upper part of the fractured zone, the communication of the fractures is not good, and the coal seam only partially expands and deforms; when the protected layer is located at the edge of the fractured zone and th...

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 relates to an application of a non-coal pillar roadway layout in the under-protected stratum exploitation. The non-coal pillar roadway layout comprises a stagger arrangement or gob-side entry driving roadway layout, the non-coal pillar roadway layout is adopted in the under-protected stratum exploitation of a dynamic disaster coal stratum, and a coal pillar supporting overlying strata between adjacent work surfaces is removed, so the inclined continuous recovery of a stope is realized; and a fracture zone above the stope ascends and the arrangement of the protected coal stratum in the fracture zone descends with the increase of the exploitation range, so the application range of the under-protected stratum exploitation is widened, the mining is full, the destressing effect is obvious, and the protected stratum is not influenced by the installation of the coal pillar in the protected stratum, thereby the safe and economic exploitation of the protected stratum is realized.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to the application of a coal pillarless coal mining method in the mining of lower protective layers. Background technique [0002] Mining the protective layer is an effective means to eliminate the dynamic disasters in the protected layer. At present, the mining of the protective layer has become the first choice for regional prevention and control measures. [0003] According to the degree of mining, the upper part of the goaf is divided into caving zone, fissure zone and bending subsidence zone. Research on the division of the above "three zones". However, it is traditionally believed that when applying a protective layer, there is a distance limitation problem between the protected layer and the protected layer, that is, there are certain requirements for the distance between the protective layer and the protected layer, especially the use of the lower protective layer, if If the dist...

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): E21C41/16E21F15/00
Inventor 乔建永王志强赵景礼
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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