Yielding anchor bolt plate with warning function and using method

Abstract

The invention discloses a yielding anchor bolt plate with a warning function and a using method. The yielding anchor bolt plate is composed of a yielding energy-absorbing system and a stress warning system. The yielding energy-absorbing system is composed of an upper plate, variable cross-section yielding columns and a lower plate, and the stress warning device is composed of a stress warning ruler and a warning pointer; the four variable cross-section yielding columns are distributed along a ring array of vertical center shafts of the upper and the lower plates, and in an inclined state relative to the center shafts; and the bottoms of the variable cross-section yielding columns are welded on the lower plate, and the tops of the variable cross-section yielding columns are embedded into an arc-shaped groove of the upper plate. According to the yielding anchor bolt plate with the warning function and the using method, the top ends of the variable cross-section yielding columns slide along the arc-shaped groove in the process of using to further enable the warning pointer to rotate, and the stress state of an anchor bolt is rapidly and intuitionally judged through observation, so that the safety stock situation of the stress of the anchor bolt can be judged; the stress state of the anchor bolt and coordinate deformation of the variable cross-section yielding columns are linked together by using a deformation characteristic of the variable cross-section yielding columns, the goal of yielding can be achieved, and further different yielding modes can be achieved; and the yielding anchor bolt plate is convenient to install, simple in operation, and can be widely suitable for engineering field.

Description

technical field [0001] The invention relates to the field of bolt support devices for underground engineering, in particular to a yielding bolt tray with a warning function and a use method thereof. Background technique [0002] With the development of my country's economy and society, more and more underground space projects such as underground mines, subways, and hydropower chambers have been built, and the mining depth has continued to increase. More underground chambers are under harsh geological conditions such as high ground stress and soft rock. The surrounding rock of the chamber often exhibits the characteristics of large deformation, and the support problems faced therewith are becoming more and more prominent. In the process of underground engineering support, bolts are the most widely used and used supporting materials, but the existing traditional bolts have low elongation and cannot adapt to the large deformation characteristics of the surrounding rock of the ro...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pressure anchor tray with a warning function and its use method to solve the problems of low elongation, poor energy absorption and anti-shock performance, and inability to intuitively display the internal force situation existing in existing anchors. Problems that do not have the warning function, so as to effectively control the stability of the surrounding rock of the roadway, predict the potential danger of the surrounding rock of the roadway, and warn the hidden dangers of safety accidents

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