Deep three-soft coal seam asymmetric tunnel supporting structure

A technology for three-soft coal seam and roadway support, applied in mining equipment, earthwork drilling, installation of anchor rods, etc. The effect of slowing down plastic deformation and restraining large nonlinear deformation

Active Publication Date: 2016-08-31
CHINA UNIV OF MINING & TECH
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned support methods have their own advantages and disadvantages, but up to now, the roadway support in deep three-soft coal seams still has technical problems such as high support cost, large maintenance amount, poor support effect, and insufficient support theory and methods.

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
  • Deep three-soft coal seam asymmetric tunnel supporting structure
  • Deep three-soft coal seam asymmetric tunnel supporting structure
  • Deep three-soft coal seam asymmetric tunnel supporting structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Taking the deep three-soft coal seam roadway of a coal mine in the Huainan mining area as an example, the roadway support structure of the present invention is used to systematically study the roadway surrounding rock control effect.

[0034] 1. Basic situation of roadway

[0035]Occurrence conditions of the three soft coal seams in the deep part of the mine: the roof and floor are composed of mudstone and clay rock, and partly composed of fine sandstone and siltstone, and there is a mudstone interlayer of about 1.2m in the middle of the coal seam. The roof mudstone is 1m thick and has low strength, and the siltstone is 7m thick and is medium-hard rock. The roof mudstone is 3.5m thick and the claystone is 1.8m thick, both of which are typical soft rocks. The roof and floor are all soft rock, and the coal seam is a typical three-soft coal seam.

[0036] The buried depth of the three-soft coal seam roadway is -650m, the vertical self-weight stress of the roadway is abou...

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 deep three-soft coal seam asymmetric tunnel supporting structure comprising a tunnel top support, a roadside support, and a tunnel bottom support; the tunnel top support comprises a metal net used for supporting the tunnel top, and top steel bar ladder beams, top anchor poles and top anchor cables used for reinforcing the tunnel top,; the roadside support comprises a high side support and a low side support, each of which comprises an electric welding plain net used for supporting the roadside, and side steel bar ladder beams and side anchor poles used for reinforcing the tunnel roadside; the high side support also comprises side cables; the tunnel bottom support comprises base angle anchor poles vertically and symmetrically arranged along the tunnel, wherein the base angle anchor poles are arranged on two side base angles formed by the tunnel bottom and the roadside, and the angle of depression is 45 degrees. The anchor-beam-net-cable combined support mode is employed; the anchor poles, anchor cables and steel bar ladder beams of the tunnel top and roadside can improve tunnel surrounding rocks stress states; the side cables are arranged so as to reinforce tunnel high side local support; the base angle anchor poles are arranged so as to effectively control the tunnel bottom heaves.

Description

technical field [0001] The invention relates to an asymmetric roadway support structure, in particular to an asymmetric roadway support structure in deep three soft coal seams. Background technique [0002] my country is a large coal-producing country, and coal is the main energy source in our country with abundant reserves. The Twelfth Five-Year Plan pointed out that until 2015, the proportion of coal in my country's energy consumption will still account for about 63%. It is difficult to change the coal-based energy structure. Since the founding of New China nearly 70 years ago, China's energy supply and consumption capacity has changed from weak to strong, and China has become the world's largest energy producer and second largest energy consumer. In recent years, the scale, output and depth of coal mining in the central and eastern regions of my country have been increasing year by year, and shallow coal resources have become less and less. In order to meet the urgent de...

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): E21D21/00
CPCE21D21/00E21D21/008
Inventor 张炜张东升吴立新马立强胡文敏闫世勇
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