Large-deformation constant-resistance periodic yielding bolt

Abstract

The invention discloses a large-deformation constant-resistance periodic yielding bolt. The large-deformation constant-resistance periodic yielding bolt comprises a yielding bolt body, a sleeve, an elastic shell, an annular lockset, a wedge, a rubber pad, a backing plate and a nut, wherein the yielding bolt comprises an ordinary yielding bolt body section, a corrugated surface bolt body section; a rectangular wedge groove is formed in the end of the corrugated surface bolt body section; the sleeve comprises a hollow sleeve section and a solid section; symmetric slots are formed on the left and right sides of the hollow sleeve section; external threads are formed on the external surface at the end of the solid section; the hollow sleeve section sleeves the corrugated surface bolt body section of the yielding bolt; the annular elastic shell sleeves the external side of the hollow sleeve section; the annular lockset is arranged on the annular elastic shell; the rubber pad is arranged between the solid section of the sleeve and the backing plate, and moreover, the backing plate is fixedly arranged at the end of the solid section of the sleeve by the nut. When being impacted, the large-deformation constant-resistance periodic yielding bolt is capable of instantly realizing large deformation without damaging the whole structure of the yielding bolt, so that the yielding bolt has a bearing capacity and effect of resisting against impact can be realized.

Description

technical field [0001] The invention relates to an anchor rod, in particular to a large-deformation constant-resistance periodic yielding anchor rod. Background technique [0002] Anchor rods are widely used in underground engineering as an efficient support structure. With the depletion of shallow resources, more and more metal and non-metal mines have entered deep mining. The deep complex physical environment such as: high stress, high osmotic pressure and strong mining disturbance and other factors cause engineering problems such as large deformation, long deformation duration and increased frequency of rock burst in deep rock mass. Ordinary anchor bolts have insufficient elongation, reduced strength after extension, and lack of impact resistance, which can no longer meet the requirements of high resistance yield and impact resistance for deep rock mass support. Contents of the invention [0003] In order to solve the above technical problems, the present invention pr...

AI Technical Summary

Problems solved by technology

The deep complex physical environment such as high stress, high osmotic pressure and strong mining disturbance cause engineering problems such as large deformation, long deformation duration and increased frequency of rock burst in deep rock mass

Ordinary anchor bolts have insufficient elongation, reduced strength after extension, and inability to resist impacts, etc., which can no longer meet the requirements of high resistance, compression and impact resistance for deep rock mass support.

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