Annular extension limit flexible pressurized grouting bolt

An anchor rod and flexible technology, applied in the installation of anchor rods, construction, mining equipment, etc., can solve the problems of insufficient strength and unlimited hoop deformation, and achieve the effect of enhancing the overall strength, improving the fastening effect, and facilitating installation.

Inactive Publication Date: 2007-12-12
SHANDONG UNIV
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defect that the existing "flexible injection anchor" has no limitation on the circumferential deformation of the rod body, resulting in insufficient strength, and to invent a method that can not only maintain the existing advantages of the "flexi

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
  • Annular extension limit flexible pressurized grouting bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The best embodiment, as shown in Figure 1 and Figure 2:

[0018] Take the bolt commonly used in coal mines as an example. Coal mines usually use a drill bit with a diameter of 28mm to drill the anchor hole to place the anchor rod. In order to facilitate the installation of the flexible injection anchor rod, the diameter of the anchor rod body is slightly smaller than the diameter of the drill bit, which is determined to be 27mm. The diameter of the injection cavity is 14mm, and a mandrel with a diameter of 14mm is selected, and the release agent is coated on the mandrel. The sealing layer 1-4 in the main body of the anchor rod 1 has a thickness of 2.5mm, which is extruded from natural rubber, sleeved or directly extruded On the mandrel; 30 steel strands with a diameter of 1.5mm are selected for the longitudinal reinforcement layer 1-3, and are uniformly distributed on the outer surface of the sealing layer 1-4 along the longitudinal direction of the anchor rod, or extru...

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 involves geotechnical and mine engineering supporting facilities technology field, in particular relates to a hoop limited extension flexible casting and pressing anchor bar. It bases the bar body structure of prior 'flexible casting and pressing anchor bar', imbeds the fiber or steel line or armored rope or the woven fabric of them with length-constant extension structure circumferentially into the outer layer perimeter of longitudinal reinforced layer in the bar body of flexible casting and pressing anchor bar, and it reinforces the whole body of the anchor bar body. It also improves the integrated structure of prior anchor bar and pallet into the assembling structure of anchor bar and pallet. The invention also has advantages as followings on the basement of maintaining prior technology application effect: the circumferential reinforced structure of anchor bar body limits the deforming amount of bar body, strengthens the integral strength of anchor bar body, avoids anchor bar body abatement caused by bar cavity leakage generated by creep deformation and other reasons; when the avalanches of anchor hole port happen or the anchor hole has honeycomb gaps, the anchor bar will not deform limitlessly than the anchor bar abatement is leaded out; the pallet is changed into assemblage structure to make the installation of anchor bar more convenient.

Description

1. Technical field [0001] The invention relates to the technical field of rock soil and mine engineering support facilities, in particular to a flexible pressure-injection bolt with limited extension in the circumferential direction. 2. Background technology [0002] In the mining process of geotechnical, tunnel and coal mines, bolt support is a surrounding rock control technology with two functions of support and reinforcement. Compared with frame support, the use of bolt support technology has significant economic benefits. [0003] Traditional bolts can be divided into full-length anchor bolts and end anchor bolts. The materials used for full-length anchor bolts are all rigid materials, which are filled and bonded with the anchored rock formations through various adhesives; this type of anchor bolts mainly has the following disadvantages: 1. The construction and installation are complicated, and the construction period 2. It is impossible to compensate the change of the ...

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
IPC IPC(8): E02D5/74E21D21/00
Inventor 王威强陈中合颜建成张洪生张怀钦
Owner SHANDONG UNIV
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