A Coal Mining Method for F-shape Sections Realizing Coal Pillar Coal Mining

A coal mining method and section technology, which is applied in the field of simultaneous recovery of underground solid coal and section coal pillars, can solve the problems of one-time mining of difficult-to-protect coal pillars, complex recovery construction technology, and low resource recovery rate, and achieve resource mitigation. The effect of conflicting with society, reducing safety production accidents, and increasing service life

Inactive Publication Date: 2017-05-03
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

This method can start to solve the above-mentioned low resource recovery rate at the time of mining, and there are corresponding problems in mining technology, such as high mining cost, complicated recovery construction technology, and difficulty in large-scale one-time recovery of corresponding protected coal pillars, etc. Outstanding issue

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
  • A Coal Mining Method for F-shape Sections Realizing Coal Pillar Coal Mining
  • A Coal Mining Method for F-shape Sections Realizing Coal Pillar Coal Mining
  • A Coal Mining Method for F-shape Sections Realizing Coal Pillar Coal Mining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Such as figure 1 A schematic diagram of the overall structure of an F-shaped section coal mining method that realizes simultaneous mining of coal pillars, including: upper section goaf 1; filling paste 2; filling grouting pipeline 3; section protection coal pillar 4 ; air return lane 5; flexible ventilation pipe 6; air inlet lane 7; solid coal 8; air outlet 9; coal mining machine 10; goaf 11; hydraulic support 12;

[0013] A kind of F-type section coal mining method that realizes coal pillar simultaneous mining of the present application, it is mainly to carry out corresponding recovery simultaneously with the upper section protection coal pillar 4 of air return roadway while reclaiming solid coal 8, at this moment The coal mining face is divided into two parts, wherein a part is the solid coal mining face, and the other part is the coal pillar mining face; Install the corresponding hydraulic support 12 so that it can protect the entire mining face accordingly; during ...

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 an F-type section coal-mining method allowing commingled mining of coal pillars. The method is specific mainly to the problem of technical methods for stoping of sectional protective coal pillars. A working face is divided into two parts, one part is a solid coal stoping face, and the other part is a coal pillar stoping face. Hydraulic supports are spread in the whole working face. Air from the solid coal stoping face is discharged from an intake roadway via a return roadway during a mining process. The coal pillar stoping face uses local ventilators, air is pressed from the intake roadway into the coal pillar face through flexible air pipes, and the air is returned via the return roadway. During stoping of an upper section, major factures are given to a main roof over a coal wall by pre-blasting, , the basic roof breaks at this position after stoping, and thus pressure increase in close-to-gob areas caused by rotation of the main roof is decreased. In addition, a filled wall which is formed by means of filling and the like isolates an upper section gob area and a lower section coal pillar stoping face, and thus roof fall and side spanning accidents caused are decreased.

Description

technical field [0001] The invention relates to a method for simultaneous mining of underground solid coal and section coal pillars, especially suitable for complex geological conditions in the working face, wide section protection coal pillars and high support costs. The method belongs to underground coal mines. The field of resource extraction. Background technique [0002] The existing conventional coal mining methods in my country generally leave a certain width (20-40m wide) of protective coal pillars between the section working faces, resulting in a large amount of coal resources being left in the goaf, which is difficult to recycle. The recovery rate is low. In recent years, some mines in my country have adopted methods such as re-mining or waste gangue replacement for the wider coal pillars with high-quality coal resources to recover resources. However, due to problems such as stress concentration and coal fragmentation, the recovery project is relatively large. , Th...

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): E21C41/18
Inventor 谢生荣何富连谢国强杨军辉
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