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

Coal mine tunnel broken surrounding rock layering grouting technology and method

A technology for crushing surrounding rocks and coal mine roadways, applied in tunnels, tunnel linings, mining equipment, etc., can solve the problem that the shallow and deep grouting drilling cannot be unified, the deep grouting is poor, and the shallow and deep grouting materials cannot be the same. and other problems, to achieve the effect of good grouting effect and low grouting cost

Inactive Publication Date: 2015-05-06
HENAN POLYTECHNIC UNIV +1
View PDF6 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to aim at the serious grout leakage in the shallow layer, poor injectability in the deep layer, inconsistency of grouting materials in the shallow layer and deep layer, inability to unify the grouting holes in the shallow layer and deep layer, etc. To solve technical problems, provide a layered grouting process and method, which is more suitable for the fragmentation degree and permeability characteristics of the surrounding rock.

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
  • Coal mine tunnel broken surrounding rock layering grouting technology and method
  • Coal mine tunnel broken surrounding rock layering grouting technology and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] A coal mine roadway broken surrounding rock layered grouting process and method, such as figure 1 As shown, proceed as follows:

[0025] The first step is grouting drilling for vertical or oblique roadway surrounding rock construction. The hole diameter of the 2m part of the hole is at least φ42mm, and the hole diameter of the rest is required to be ≥φ28mm. The hole depth is generally more than 2000mm according to the needs of grouting reinforcement;

[0026] The second step is to wind the cotton yarn at the front and rear ends of the sealing device, the winding length is 200-300mm, and the thickness is slightly larger than the hole diameter, and the deep grouting pipe (deep grouting diversion pipe, deep grouting flower pipe) is connected, and inserted into the hole;

[0027] The third step is to connect the outer layer grout...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a coal mine tunnel broken surrounding rock layering grouting technology and method. Novel double-fluid inorganic grouting materials are adopted, and the method is matched with a novel grouting hole sealing device to achieve drilling layering grouting. The method comprises the steps that grouting drilling is constructed at first, the dual-layer grouting hole sealing device is adopted for hole sealing, then, grouting materials with the low water cement ratio, high viscosity and high condensation speed are adopted to be used in cooperation with the low-pressure and low-flow grouting technology, an outer layer grouting pipe is utilized for conducting grouting on a surrounding rock shallow layer broken zone to form an effective grouting stopping layer, then, the water cement ratio of the grouting materials is improved gradually, the material permeability characteristics are improved, the material curing time is prolonged, the grouting pressure is gradually improved, and an inner layer grouting pipe is utilized for completing surrounding rock deep layer grouting. The method adapts to surrounding rock failure and permeability characteristic zoned characteristics, the grout leakage problem is effectively solved, and layering grouting in the same drilled hole is achieved.

Description

technical field [0001] The invention relates to a layered grouting process and method for broken surrounding rocks in a coal mine roadway, and has certain adaptability to grouting reinforcement of tunnels, foundation pits, side slopes and other engineering projects. Background technique [0002] The grouting reinforcement of the broken surrounding rock in coal mine roadway has become one of the effective technical measures to control the deformation of the surrounding rock and prevent the side and roof fall accidents. However, the current ordinary cement or polymer grouting materials cannot adapt to the partition of the surrounding rock damage and permeability characteristics. Features: Ordinary cement grouting materials have problems such as serious grout leakage in shallow layers, poor injectability in deep layers, and long curing time. Polymer grouting materials have shortcomings such as fixed performance parameters, high cost, and toxicity and corrosion. Some mines use s...

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): E21D11/10C04B28/14
CPCE21D11/10C04B28/14C04B2111/00724C04B7/32C04B22/06
Inventor 熊祖强王俊杰王雨利曹建波胡黎明
Owner HENAN POLYTECHNIC UNIV
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