An Expansive Anchor Cable Resisting Large Deformation of Surrounding Rock

Abstract

The present invention discloses an expansive type anchor cable resistant to large deformation of surrounding rocks. Elliptical ball shaped steel elliptical balls are vertically arranged in the central axis of the anchor cable; a central steel strand sequentially penetrates and is fixedly installed in positive transverse directions of the steel elliptical balls from top to bottom; external surfaces of the steel elliptical balls are uniformly wound with encircling steel strands; and the central steel strand and the encircling steel strands extend at two ends of the anchor cable and are collected and fixed together. The anchor cable is simple in structure and convenient to use, during the using process, the diameter of the anchor cable does not become smaller but becomes larger under the condition that the anchor cable is stretched due to deformation of the surrounding rocks, so that pressure applied to the surrounding rocks or anchoring agent is increased and resistance of the anchor cable is largely increased, quality of coupling between the anchor cable and the surrounding rocks does not become poor but is well improved, and reliability of the anchor cable technology is increased.

Description

technical field [0001] The invention relates to a support anchor device for a coal mine roadway, in particular to an inflatable anchor cable which is suitable for a large deformation roadway under the soft rock condition of a deep mine and resists large deformation of surrounding rock. Background technique [0002] As one of the important components in the field of coal mine roadway engineering support, the anchor cable is more and more widely used by coal mine technicians. The joint support method of anchor cable and anchor rod, metal mesh, beam, and concrete sprayed layer can control the deformation of surrounding rock better, and is one of the main support schemes in coal mines in my country. [0003] In recent years, with the increase of my country's coal production and the change in demand for economic development, a large number of eastern mines have taken the lead in deep mining. However, deep mining is facing a series of difficulties, such as high ground temperature,...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the use of the anchor cable, as the rock mass deforms, the anchor cable will deform and elongate accordingly, resulting in a thinner diameter of the anchor cable, resulting in deterioration of the coupling quality between the anchor cable and the anchoring agent, and eventually causing the phenomenon of anchor withdrawal The problem that occurs, the present invention provides a kind of expansion type anchor cable that resists large deformation of surrounding rock

Images