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

Coal mine loose powder coal body anchor rod drill hole hole-forming construction technology

A technology of loose powder and construction technology, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc. It can solve the problems of not reaching the designed installation size and the failure of bolt installation, etc., achieves wide practicability and improves physical and mechanical properties , The effect of preventing the drilling hole from collapsing

Inactive Publication Date: 2018-05-18
CHINA UNIV OF MINING & TECH
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the construction of anchor rod drilling in loose powder coal, after the drill pipe is pulled out, the borehole will be deformed and collapsed. According to the traditional anchor rod construction technology, the fast resin drug coil, the medium speed resin drug coil and the anchor rod are placed in sequence. Drill the hole, and then start the drilling rig to stir the resin roll to install the anchor rod. Due to the deformation of the drilled hole and the collapse of the hole, the anchor rod cannot be installed to the bottom of the hole, and the designed installation size cannot be reached.

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 loose powder coal body anchor rod drill hole hole-forming construction technology
  • Coal mine loose powder coal body anchor rod drill hole hole-forming construction technology
  • Coal mine loose powder coal body anchor rod drill hole hole-forming construction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The coal mine loose powder coal body bolt drilling and hole-forming construction technology of the present invention comprises the following steps:

[0022] a. Use the bolt drill to drill the bolt hole according to the designed hole position. The diameter of the hole wall should be 3-6mm larger than the diameter of the bolt;

[0023] b. After the bolt drilling is completed, use full-length anchoring, and the full-length anchoring length is 90% of the drilling depth; Into the bolt hole, the resin anchoring agent adopts slow resin anchoring agent; then artificially push the resin anchoring agent with the anchor rod to prevent the resin anchoring agent from breaking in advance when the drilling machine pushes the anchor rod; the required stirring resin anchoring agent The calculation formula of agent length l is as follows formula (1),

[0024]

[0025] In the formula:

[0026] l—length of resin anchoring agent, mm;

[0027] R—drilling radius, mm;

[0028] R 1 — di...

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

A coal mine loose powder coal body anchor rod drill hole hole-forming construction technology includes the steps that after construction of a drill hole of an anchor rod is completed, a stirring capsule resin is injected in the drill hole of the anchor rod, all the designed capsule resin is injected into the hole at one time, workers use the anchor rod to push the capsule resin until the capsule resin cannot be pushed continuously, and a torque nut matched with a drilling machine is used for pushing the anchor rod; the slow-speed of revolution is used, a creep speed capsule resin is slowly pushed to the hole bottom, when the capsule resin reaches the hole bottom, the drilling machine is regulated to fast revolution, after the creep speed capsule resin is completely solidified, and the torque nut is opened under the driving of an anchor rod drilling machine to enable the anchor rod to reach a designed preload. By improving installing construction technology of the anchor rod, the difficulties that when the anchor rod is used to construct in the coal mine loose powder coal body, the drill hole is prone to deforming and collapsing, the anchor rod cannot be installed to the hole bottom, and the construction cannot reach the designed installing size can be effectively solved. According to the coal mine loose powder coal body anchor rod drill hole hole-forming construction technology, the anchor rod can be effectively solidified with the capsule resin in the loose powder coal body, the anchor rods with various designed installing sizes can be met, and the construction quality ofthe anchor rods can be guaranteed.

Description

technical field [0001] The invention relates to a drilling and hole-forming construction technology, in particular to a drilling and hole-forming construction technology for anchor bolts in loose powder coal roadways of coal mines. Background technique [0002] In the construction of anchor rod drilling in loose powder coal, after the drill pipe is pulled out, the borehole will be deformed and collapsed. According to the traditional anchor rod construction technology, the fast resin drug coil, the medium speed resin drug coil and the anchor rod are placed in sequence. Drill the hole, and then start the drilling rig to stir the resin roll to install the anchor rod. Due to the deformation of the drilled hole and the collapse of the hole, the anchor rod cannot be installed to the bottom of the hole and cannot reach the designed installation size. Therefore, the coal mine roadway construction site urgently needs to seek a kind of coal mine loose powder coal body bolt hole formin...

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): E21D20/02
Inventor 高明仕赵一超高晓君王翔宇
Owner CHINA UNIV OF MINING & 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