Supercharge Your Innovation With Domain-Expert AI Agents!

Hard coal seam water injection scour prevention method and system

A coal seam water injection, hard technology, used in earth-moving drilling, mining equipment, surface mining and other directions, can solve the problems of long water injection time, low water injection efficiency, equipment loss, etc. The effect of rock penetration

Pending Publication Date: 2021-09-21
XIAN UNIV OF SCI & TECH
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the many geological conditions of coal seams, for hard coal seams, due to their compact structure and high strength, there are problems such as long water injection time, low water injection efficiency, poor effect, and serious equipment loss.

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
  • Hard coal seam water injection scour prevention method and system
  • Hard coal seam water injection scour prevention method and system
  • Hard coal seam water injection scour prevention method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the ...

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 hard coal seam water injection scour prevention method and system, and aims to improve the water injection efficiency of a hard coal seam. Therefore, on on hand, the hard coal seam water injection scour prevention method is provided by the embodiment, and the hard coal seam water injection scour prevention method comprises the following steps that holes are drilled in coal seam surrounding rock; high-pressure water jet is used for cutting water jet kerfs in the drilled holes, so that the permeability of the surrounding rock around the drilled holes is enhanced, wherein fine sand with a set proportion is mixed in the high-pressure water jet, and the fine sand in the water is embedded into cracks around the water jet kerfs under the action of high-water-pressure impact; the water is injected into the surrounding rock of the coal seam through the drilled holes, hydraulic fracturing is conducted on the coal seam, and a coal seam pressure relief zone is formed in the coal seam; when the water injection amount does not change obviously, water injection is stopped, and on the premise that the storage state of the water in the cracks of the surrounding rock around the drilled holes is not affected, a water-sand mixture in the drilled holes is pumped out; and microwave heating is carried out on the surrounding rock around the drilled holes.

Description

technical field [0001] The invention belongs to the technical field of coal seam mining, and in particular relates to a water injection anti-scouring method and system for hard coal seams. Background technique [0002] With the increase of coal seam mining depth, frequent rockburst disasters have caused a large number of personnel and property losses, seriously restricting the safe and efficient mining of coal in my country, threatening the effective supply of basic energy in my country, and causing widespread concern in the whole society. Coal seam water injection is the most commonly used method for coal seam scour prevention in my country, and its efficient implementation is related to the effectiveness of rock burst prevention. Among the many geological conditions of coal seams, for hard coal seams, due to their compact structure and high strength, there are problems such as long water injection time, low water injection efficiency, poor effect, and serious equipment los...

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): E21C41/18E21F17/00
CPCE21C41/18E21F17/00
Inventor 顾合龙来兴平单鹏飞张帅
Owner XIAN UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com