Check patentability & draft patents in minutes with Patsnap Eureka AI!

Supporting method of pressure-bearing end anchor with high pre-tightening force bolt

A bolt support and pre-tightening technology, which is applied in the installation of bolts, earth-moving drilling, mining equipment, etc. The effect of improving the force, ensuring the support efficiency, and facilitating the application of pre-tightening force

Inactive Publication Date: 2016-04-20
CHINA UNIV OF MINING & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the grouting body, it is in a state of tension, and its mechanical performance is the worst. At the same time, due to the small length of the free section, the application of prestress is limited, and the active support cannot be fully realized.

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
  • Supporting method of pressure-bearing end anchor with high pre-tightening force bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0023] The concrete steps of the pressure-bearing type end anchor high pre-tightening force bolt support method of the present invention are as follows:

[0024] a. According to the surrounding rock conditions of the roadway and the requirements of stability control, design the pre-tightening force of the bolt, the anchor length of the end anchor section and the row spacing between the bolts, and drill in the surrounding rock 10 with a bolter rig at the design position according to the design parameters Drill the bolt hole 8, and clean the bolt hole;

[0025] b. Install the end anchor resin anchor rod, and put the resin drug coil 9 into the hole according to the requirements; according to the designed end anchor length, first send the anchor rod 6 with the resin drug coil on the head into the constructed anchor rod drilling hole Carry out the end anchor in...

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 pressure-bearing type end-anchoring high-pretightening-force anchor rod support method which is applicable to surrounding rock support in mine sinking and driving engineering. According to the method, at the end of the hole bottom, an anchor rod is fully adhered to surrounding rocks of the bottom of an anchor rod hole through a resin cartridge, and end anchoring effect is realized; a PVC (polyvinyl chloride) sleeve or a sleeve made of similar materials is mounted on an anchor rod body of a free section, a space between the sleeve and the anchor rod hole is filled with cement mortar, a cement mortar body is fully adhered to surrounding rocks of the anchor rod hole, and the cement mortar body cannot be adhered to the anchor rod due to the sleeve, so that pretightening force can be ensured to be applied to the anchor rod at different time periods, and the pretightening force of the anchor rod can be remarkably increased; particularly, under the condition of weak surrounding rocks, the cement mortar body of the free section can bear the pretightening force if an anchoring section at the resin end is displaced, so that support efficiency of the pretightening-force anchor rod is guaranteed to the greatest extent, and stability and safety of surrounding rocks of deep tunnels are facilitated.

Description

technical field [0001] The invention relates to a pressure-bearing end anchor high pre-tightening force bolt support method, which is especially suitable for the control of the stability of weak surrounding rocks in deep roadways, and is also suitable for the support and maintenance of mine shaft engineering and high and steep slope engineering. Background technique [0002] Prestressed bolt support is currently the main technical means to control the displacement stability of deep roadways. The anchoring methods of the anchor rod include end anchoring, full-length anchoring and extended anchoring. [0003] When the end is anchored, the free section of the anchor rod is long, and the prestressing range of the anchor rod is large, and the thickness of the effective compressive stress zone formed is large, but the compressive stress in the middle of the free section of the anchor rod is small, thus affecting the anchoring effect. Except for the anchoring end, the tensile forc...

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): E21D20/02E21D21/00
Inventor 田建胜胡立栾赵成
Owner CHINA UNIV OF MINING & 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