Method for slowing longwall mining pressure appearance of shallow coal seam below gully

A gully and coal seam technology, applied in underground mining, surface mining, special mining, etc., can solve the problems of poor safety, high cost, affecting mine safety production, etc., and achieve the effect of strong applicability, improved recovery rate, and easy implementation.

Active Publication Date: 2014-03-26
CHINA UNIV OF MINING & TECH
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the longwall mining of shallow coal seams under gullies, the existing technical measures have problems of poor safety and high cost due to a series

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 slowing longwall mining pressure appearance of shallow coal seam below gully

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] During the mining deployment, in order to reduce or avoid the impact of gully slope activities on mining, the position of the stop production line of the working face and the advancing direction of the working face are adjusted to realize mining in ditch avoidance or mining along the ditch.

[0013] Referring to the attached figure, when mining in trench avoidance, according to the mining influence angle (δ) and overburden fracture angle The area affected by gullies to mining is divided into no-influence area (I), impact area (II) and strongly-influence area (III). Mining influence angle (δ) and overlying rock breaking angle It can be obtained from the actual measurement data of each mining area. When the gully slope top (3) is affected by mining, the position of the working face is the dividing line between the unaffected area (I) and the affected area (II); the overburden breaking angle is determined by the gully slope top (3) , the corresponding position (4) is ...

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 belongs to the field of mineral engineering, and in particular relates to a method for slowing the longwall mining pressure appearance of a shallow coal seam below a gully. In order to solve the problem of longwall mining pressure appearance abnormality of the shallow coal seam below the gully, the invention proposes that the development situation of a ground surface gully needs to be taken into consideration as an important influence factor when shallow coal seam longwall mining is performed in a gully development area. According to a propagation angle and an overburden rock breaking angle, the mining influence area of the gully is divided into an influence-free area, an influence area and a strong influence area; the determination of the position of a stop line of gully-avoiding mining and the arrangement of a working surface of gully-along mining are based on the following principles: during the gully-avoiding mining, the position of the stop line is positioned out of the strong influence area; during the gully-along mining, the boundary position, close to one side of the gully, of the working surface is in the area where the overburden rock height is more than the fissure area height. The method involves few calculation parameters, facilitates field implementation, has high safety, and can be widely applied to large-scale safe mining of the shallow coal seam below the gully.

Description

technical field [0001] The invention belongs to the field of mining engineering, and in particular relates to a method for alleviating the appearance of mine pressure in longwall mining of a shallow buried coal seam under a buffer ditch. Background technique [0002] With the continuous implementation of the national policy of developing the western regions of our country, the development focus of my country's coal resources has begun to shift to the western regions. Compared with the Southwest Coalfield, the Northwest Coalfield has sparse surface vegetation, weak water and soil conservation capacity, serious surface water erosion, vertical and horizontal gullies, large changes in slope shape, fragmented terrain, and a relative height difference of more than 100 meters. Most of them are gully development areas. . The unfavorable impact of surface relief on coal seam mining has been confirmed by more and more theoretical research and engineering practice. For example, durin...

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): E21C41/16
Inventor 王旭锋张东升张杨范钢伟张呈国
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