An anchoring energy-absorbing bolt device for controlling deep rock mass

Abstract

The invention provides an anchoring energy-absorbing anchor rod device for controlling deep rock mass. The device comprises a short and thick deformed steel bar body, a long and thin bar body, rivets, an arched base plate and a fastening screw nut, wherein the short and thick deformed steel bar body is smoothly connected with the long and thin bar body; the diameter of the short and thick deformed steel bar body is equal to the sum of the diameter of the long and thin bar body and the lengths of two rivets; the rivets are uniformly distributed on the short and thick deformed steel bar body in an inverted wedged manner; the other end of the long and thin bar body is connected with the arced base plate and is fixed through the fastening screw nut. Due to sufficient stirring by the rivets and the inverted wedged arrangement mode, the anchoring effects of medium-long anchor rods and super-long anchor rods in deep engineering rock mass are effectively improved; through the yield of the rivets, the deformation of a part of the rock mass can be absorbed, and the requirements in controlling the deep engineering rock mass on the anchoring effects of the anchor rods can be met; the anchoring energy-absorbing anchor rod device has the advantages of simple structure and convenience in installation.

Description

technical field [0001] The invention relates to an anchoring energy-absorbing bolt device for controlling deep rock mass. Background technique [0002] As a form of active support, bolts are widely used in underground engineering. However, after entering the deep underground mining, due to the characteristics of large deformation and continuous rheology of the deep rock mass under the action of high ground stress, the frequency of rockbursts increases. The left-handed threaded steel bolts commonly used at present cannot meet the needs of deep underground engineering well, mainly because the anchoring efficiency is not high, especially the anchoring efficiency and anchoring effect of long or super long bolts are not very ideal. Simultaneously, along with the increase of rockburst, require bolt device should have certain energy-absorbing effect, just can resist or weaken the destructive effect of rockburst. Therefore, there is an urgent need for an anchor device capable of a...

AI Technical Summary

Problems solved by technology

However, after entering the deep underground mining, due to the characteristics of large deformation and continuous rheology of the deep rock mass under the action of high ground stress, and the frequency of rockbursts increases

The left-handed threaded steel bolts commonly used at present cannot well meet the needs of deep underground engineering, mainly because the anchoring efficiency is not high, especially the anchoring efficiency and anchoring effect of long or super long bolts are not very ideal.

Images