Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of expansion cracking and anti-permeability for rapid tunneling of underground coal seam roadway

A technology of expansion cracking and roadway, which is applied in the field of expansion cracking and anti-reflection for rapid tunneling of underground coal seam roadways. It can solve the problems of easily damaged roadway, high price, and insufficient seam width, etc., and achieve safe and reliable construction process, convenient manual operation, and improved ventilation. sexual effect

Active Publication Date: 2017-01-25
TAIYUAN UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of enhanced gas drainage by hydraulic slotting is complex and difficult, the width of the slots is not enough, the resulting cracks are few, and the effect is not ideal; the hydraulic fracturing process is complicated, the equipment is huge and expensive, and the high water injection pressure is easy Destroy the roadway and induce coal and gas outburst accidents; the charging process of deep hole pre-splitting blasting technology is complicated, and phenomena such as "dummy guns" are prone to occur during the blasting process, and the huge energy of the blasting will induce the occurrence of coal and gas outbursts

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 method of expansion cracking and anti-permeability for rapid tunneling of underground coal seam roadway
  • A method of expansion cracking and anti-permeability for rapid tunneling of underground coal seam roadway
  • A method of expansion cracking and anti-permeability for rapid tunneling of underground coal seam roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as figure 1 As shown, a hole is drilled at the geometric center position of the front end 3 of the roadway 2 in the coal seam 1 and a first expansion hole 4 is constructed, a first grouting pipe 5 is inserted into the first expansion hole 4, and polyurethane 6 is used for the first expansion hole 4. The orifice of the crack hole 4 is sealed; a second expansion hole 7 is constructed directly above, directly below, directly to the left and directly to the right of the first expansion hole 4, and a second expansion hole 7 is inserted into each second expansion hole 7 respectively. A second grouting pipe 8 is used to seal the opening of each second expansion hole 7 with polyurethane 6; a third expansion hole 7 is constructed directly above and directly below the second expansion hole 7 at the same level as the first expansion hole 4. Expansion hole...

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 spalling permeability increasing method for rapid excavation of an underground seam gateway. The method is particularly suitable for advancing pre-pumping of a high-gas low-permeability seam gateway. A first spalling hole is constructed in the head-on geometric center position of the seam gateway, and second spalling holes are formed in the positions over, under, left and right the first spalling hole; third spalling holes are constructed in the positions over and under the second spalling holes horizontal to the first spalling hole, and exhausting and mining holes are constructed in the center points of the connecting lines of the first spalling hole and the third spalling holes; after drilling is finished, quick lime grout is injected into the third spalling holes in a crossing manner, and the spalling holes are control holes of one another; and through spalling pressure generated by the holes, net-shaped cracks are generated between the holes, so that the coal permeability is greatly improved, the gas exhausting and mining efficiency is improved, and the excavation speed of the seam gateway is improved; and the method is simple in technology, convenient to operate, wide in grout source, cheap and low in cost.

Description

technical field [0001] The invention relates to a coal seam fracturing anti-permeability method, in particular to an expansion crack anti-permeability method for rapid excavation of an underground coal seam roadway. Background technique [0002] Most coal seams in my country have the characteristics of high gas, high adsorption, and low air permeability, and with the increase of coal seam mining depth, the problem of low air permeability becomes more prominent, which brings safety hazards to coal seam roadway excavation and seriously affects the excavation speed , leading to tension in coal mining succession. At present, the pressure relief and permeability enhancement measures commonly used in high gassy and low permeability coal seams in my country include hydraulic slotting, hydraulic fracturing, and deep hole pre-splitting blasting. The method of enhanced gas extraction by hydraulic slotting is complex and difficult, the width of the slots is not enough, the resulting cr...

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): E21F7/00E21B33/13E21B43/26
Inventor 胡胜勇崔东林冯国瑞高磊陈少林高嫱张钰亭李振张奡
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com