Soft rock shearing box for simulating blasting effect

Abstract

The invention relates to a soft rock shearing box for simulating a blasting effect. The box is provided with an upper shearing box and a lower shearing box, wherein a cavity for placing a rock sampleis formed in the center of the shearing box, a chuck steel ring is arranged in the upper shearing box, 6-10 flat-column-shaped grooves are uniformly distributed in the periphery of the upper shearingbox, a blasting disc is arranged in the flat-column-shaped grooves and rotates in the flat-column-shaped grooves by taking the chuck steel ring as an axis, and a powder pipe hole is formed in the blasting disc and used for mounting a powder charging test pipe and pipe cap; and the lower shearing box is joggled on the sliding rolling row. The shearing box is scientific and reasonable in structure,is suitable for carrying out a soft rock shear rheological test under a simulated blasting effect indoors, can more truly simulate the influence of blasting modes such as explosives with different intensities, different hole depths, charging modes, different blast hole inclination angles, different blasting orientations and millisecond blasting on rock sample shear rheological damage, is high in test efficiency, and is good in accuracy, and the test result is consistent with the real situation.

Description

technical field [0001] The invention relates to a shear box, in particular to a soft rock shear box for simulating blasting action. Background technique [0002] With the rapid development of my country's infrastructure and mine construction, many high slopes with weak interlayers (soft rocks) will be encountered in the construction of hydropower, railways, highways, etc., and the shear rheological deformation of weak interlayers (soft rocks) and Strength properties will directly affect the stability of the entire high slope. Nowadays, more and more projects such as hydropower station construction and open-pit mining use blasting technology for slope construction, especially open-pit mine operations often require several years or even decades of blasting production operations, and the vibration generated by blasting increases the weakness. The degree of damage to the interlayer reduces the stability of the slope. Years of blasting operations are one of the main reasons for ...

AI Technical Summary

Problems solved by technology

However, in the process of shear rheological test, there are few reports on the shear cell device that can be used to truly simulate the blasting effect and simulate and change the blasting construction parameters at the same time.

[0003] Generally, the existing shear cell as a test device mainly has the following problems: most shear cell devices can only simulate the damage of rock samples caused by dynamic impact, and very few shear cell devices can simulate the damage caused by vibration during the shear test. However, the simulated parameters such as blasting vibration frequency and peak vibration velocity are quite different from the actual ones, and it is impossible to simulate the influence of changing blasting construction parameters on the rock sample shear test.

It is mainly reflected in the fact that the existing shear box for simulating the impact of blasting vibration on rock mass during the shear test cannot truly simulate the impact of different intensity explosives on the shear rheological damage of rock samples; it cannot truly simulate the impact of different hole depths and different The effect of the charging method on the shear rheological damage of rock samples; the influence of different blasting hole inclinations on the shear rheological damage of rock samples cannot be truly simulated; the influence of different blasting orientations on the shear rheological damage of rock samples cannot be truly simulated; The influence of different blasting methods such as real simulation of differential blasting on the shear rheological damage of rock samples

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