Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face

A fully mechanized mining face and working face technology, applied in the direction of pillars/brackets, mining equipment, earthwork drilling and mining, etc., can solve the problems of difficult recovery construction, heavy workload, and high support body strength, so as to reduce the amount of roadway maintenance, Solve the effect of large deformation and ensure personal safety

Inactive Publication Date: 2010-07-14
DALIAN UNIV
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supporting body of the side roadway has high strength and no compressibility, resulting in large deformation of the original roadway, reduced ventilation section, and heavy undercover workload
[0007] The above are the existing main methods of gob-side entry retaining support. The sup

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 significant reduction of bracket support of gob-side roadway of fully-mechanized mining face
  • Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face
  • Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The coal mining roadway support project directly adopts the technology of support and inclined arrangement to support the roadway.

[0030] The so-called support is a specially designed hydraulic large-shrinkage supporting support. Each group is composed of four columns, an integral skylight top beam and an unsealed base; the support length × width = 3.5m × 1.5m, height 1.7m~3.2m The shrinkage is more than 1.6m, and the working resistance is about 3500kN.

[0031] Such as figure 1 Shown: First, the preparatory work before fully mechanized mining is carried out. On the working face 3, install all the equipment, including the working face support 1 and the conveyor, etc. into the cutout; 2. Use the installation center line 4 of the first set of supports 8 behind the working face 3 as the center line of the working face support 1; install the conveyor below the working face support 1, and the equipment is installed and ready for production.

[0032] The support roadway ...

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 significant reduction of bracket support of the gob-side roadway of a fully-mechanized mining face, which solves the problems of the prior art. In the specific technological scheme, brackets are directly applied to support a roadway, each group of brackets are arranged continuously as a whole along a track gate and is more than 30-35 meters away from the advance face of the track gate, and the uninterrupted installation of the brackets is performed along with advancement in face exploitation; and when the advancement length in the face exploitation is 1.5-2.5 times longer than the face length, the brackets are withdrawn from the beginning of the air return roadway of the working area along the bracket withdrawing direction, and the withdrawn brackets are continuously arranged in the track gate along the bracket arranging direction so as to be recycled in the advance support of the mining face. The invention has the advantages that: the support strength is high, and the amount of reduced plungers is large, thereby reducing the roadway maintenance workload; the brackets can be recycled, and the removal and recovery of the brackets can be performed synchronously with the face mining without influencing the production; and the invention facilitates the rapid restoration of the roadway in tunneling construction.

Description

technical field [0001] The invention relates to a coal mining roadway support engineering method, in particular to a fully mechanized mining working face suitable for medium-thick coal seam mining using comprehensive mechanized operations. The top plate of the trough roadway realizes the gob-side entry retention along the trough. Background technique [0002] Gobside entry retention is to retain the transport entryway in the previous section as the return air entry entryway in the lower section by strengthening the support or side support. As a coal pillar-free roadway protection technology, gob-side entry retention is an effective way to reasonably develop existing coal resources and increase the recovery rate of coal resources; this method can greatly reduce the amount of mine roadway excavation and ease the mining process. It has obvious technical advantages and economic benefits to take over the tension, shorten the time for moving the working face, prevent fire and pro...

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): E21D15/00
Inventor 李伟宋振骐夏洪春李淑娴彭林军
Owner DALIAN UNIV
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