Test device for simulating anchor rod impact failure under tectonic stress influence

Abstract

The invention discloses a test device for simulating anchor rod impact failure under tectonic stress influence. With the test device of the invention adopted, the technical problem that a test device in the prior art cannot simulate anchor rod impact failure under tectonic stress influence can be solved. The test device of the invention includes a hexahedron test piece, a test box, an anchor rod, a front loading unit, a back loading unit, a left loading unit, a right loading unit and a top loading unit, wherein the front loading unit, the back loading unit, the left loading unit, the right loading unit and the top loading unit are loaded on the test box; the anchor rod is installed in an anchor hole of the test piece; the left loading unit includes an impact weight, a lifting device, a guide rod, an impact base, a warping rod and a loading device; the lifting device provides a vertical stress to the impact weight, the warping rod converts the vertical stress into a lateral force of the test piece, a strong spring expands and elongates instantaneously so as to quickly carry out supplementary loading on the test piece, and therefore, energy can be compensated, and further squeezing work carried out on coal and rock mass by external surrounding rock is simulated; and burst rock blocks impact the anchor rod, so that the impact failure of the anchor rod in an engineering field can be simulated.

Description

technical field [0001] The invention relates to the technical field of measuring impact damage of anchor rods in geotechnical engineering, in particular to a simulation test device for impact damage of anchor rods under the influence of structural stress. Background technique [0002] The application of the pre-tightening force of the anchor bolt and its stress after pre-tightening are closely related to the strength of the broken surrounding rock, and the existence of the complex surrounding rock environment requires the application of different pre-tightening forces of the anchor bolt. To improve the strength of surrounding rock anchorage, and larger pre-tightening force may also cause further aggravation of broken surrounding rock, both of which will cause the failure of bolt supporting surrounding rock. Therefore, the application of a reasonable bolt pre-tightening force is of great significance to the strength strengthening of rock bolts supporting broken surrounding ro...

AI Technical Summary

Problems solved by technology

[0005] The laboratory test equipment in the prior art can only simulate the mechanism of rock burst (vertical impact) under the influence of gravity, but cannot simulate the mechanism of rock burst (lateral impact) under the influence of tectonic stress, resulting in inaccurate It reflects the support effect of bolts on surrounding rock when rock burst occurs under complex conditions

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