Method and device for supporting weak adhesion bond soft rock roadway

A technology of roadway support and weak cementation, which is applied in the direction of drilling equipment and methods, earthwork drilling, installation of bolts, etc. It can solve the problems of large changes in the drilling angle of bolts, improve anchoring capacity, and achieve good hole expansion effects , the effect of simple structure

Inactive Publication Date: 2013-02-27
TIANDI SCI & TECH CO LTD
View PDF16 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing reaming technology and equipment cannot meet the needs of coal mine roadway reaming. In order to meet the requirements of coal mine roadway driving speed and large bolt drilling angle changes, it is urgent to develop a small-diameter drilling hole bottom rapid expansion suitable for coal mine roadways. Hole anchoring technology and supporting equipment provide a powerful means for the control of weakly cemented soft rock roadways in northern and western mining areas of my country

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
  • Method and device for supporting weak adhesion bond soft rock roadway
  • Method and device for supporting weak adhesion bond soft rock roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The weakly cemented soft rock roadway support method of the present invention comprises the following steps:

[0045] Step 1, determine the drilling position and the drilling depth according to the specific conditions of the surrounding rock mass around the roadway, adopt a drilling machine to drill, the diameter of the drilling is adapted to the diameter of the reaming drill bit, and the drilling diameter is 28mm, The depth is 2m;

[0046] Step 2: Connect the reaming drill bit with the drill rod, the drill rod delivers the reaming drill bit to the bottom of the borehole, the drill rod is connected to the drilling machine, the cutter 4 of the reaming drill bit is automatically opened, and the drilling machine drives the The drill rod and the reaming bit rotate to ream the bottom of the borehole. The hole structure expanded by the reaming bit is an inverted wedge shape, and the length of the cutter is 300mm, which is the hypotenuse of the inverted wedge-shaped hole struc...

Embodiment 2

[0050] The weakly cemented soft rock roadway support method of the present invention comprises the following steps:

[0051] Step 1, determine the drilling position and the drilling depth according to the specific conditions of the surrounding rock mass around the roadway, adopt a drilling machine to drill, the diameter of the drilling is adapted to the diameter of the reaming drill bit, and the drilling diameter is 42mm, The depth is 3m;

[0052] Step 2. Connect the reaming bit to the drill rod, the drill rod delivers the reaming bit to the bottom of the hole, the drill rod is connected to the drilling rig, and the drilling rig gives the reaming bit a downward axial force to ream the hole The cutter 4 of the drill bit is automatically opened, and the drilling machine drives the drill rod and the reaming bit to rotate at the same time, and the bottom of the borehole is reamed. The hole structure expanded by the reaming bit is an inverted wedge shape, and the cutting The lengt...

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 method and device for supporting a weak adhesion bond soft rock roadway. The method includes that step 1, a drilling machine is adopted for drilling holes; step 2, a reamer bit and a drilling stem are connected, and the bottom of a drilled hole is chambered; step 3, an anchoring agent and an anchor rod are placed in the drilled hole, the anchor rod and the drilling machine are connected, the drilling machine drives the anchor rod to rotate and stir the anchoring agent, after the anchoring agent is solidified, a chambering portion is full with the anchoring agent to form a solid structure in a reverse wedge shape, and the solid structure is used for fixing an anchoring section of the anchor rod; and step 4, a tray is arranged on top of the drilled hole, a nut is used for screwing a free end of the anchor rod tightly, and pre-tightening torsion meets design value. The device is a chambering reamer bit comprising a casing, a cutter and a cutter control device, wherein one end of the casing is a connector, the cutter is connected with the bottom of the connector in pivoted mode, and the cutter control device is connected with the cutter and controls the cutter to be screwed out from the casing or withdrawn. By means of the device and method, an effect of the anchor rod is good.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method and device for roadway support in weakly cemented soft rock. Background technique [0002] The complete set of bolt support technology represents the development direction of coal mine roadway support, and has incomparable advantages over other support technologies. However, the complete set of bolt support technology is very ineffective in weakly cemented soft rock roadways, and the outstanding performance is as follows: The anchoring force of the anchor rod and the anchor cable is far below the design requirements, and the anchor rod and the anchoring body can be pulled out from the drill hole with a low pull-out force; the anchor rod and the anchor cable hole are muddy during the anchoring construction process. The phenomenon is serious, which seriously affects the anchoring effect; the deformation of the roadway is large, such as floor drums, side closures, etc.,...

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): E21D20/02E21D21/00E21B7/28E21B10/32
Inventor 康红普汪占领吴志刚冯彦军
Owner TIANDI SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap