Device and method for preparing rock test piece with different inclination angles and connecting rates at different crack positions

Abstract

The invention, which belongs to the field of rock mechanics, provides a device and method for preparing a rock test piece with different inclination angles and connecting rates at different crack positions. The device comprises a base, a connecting rate cutting control assembly, and an end face crack inclination angle cutting control assembly. A T type chute is formed in the base and the base is carved with a scale. The connecting rate cutting control assembly is a mechanical lifting device and is in sliding connection with the base. The end face crack inclination angle cutting control assembly includes a crack inclination angle cutting control assembly and a to-be-cut complete rock fixation assembly and is fixedly connected with the end face crack inclination angle cutting control assembly. According to the device and method provided by the invention, making of rock samples with different inclination angles and connecting rates at different crack positions can be realized by adjustingthe assemblies; and the preparation precision of the fractured original rock sample is improved. The device has advantages of unique structure, reasonable structure, great convenience in operation, and high endurance.

Description

Technical field [0001] The invention belongs to the field of rock mechanics, and particularly relates to a device and method for preparing rock specimens with different crack positions, inclination angles and connectivity rates. Background technique [0002] There are a large number of fractured rock masses in nature. Initial defects are one of the important factors for rock fracture and instability. Cracks initiating, propagating, and perforating around the initial defects are important manifestations of the failure of rock-like brittle materials. The preparation of rock samples with different fissure positions, different fissure inclination angles, different connectivity rates and different length-to-diameter ratios in the laboratory usually requires the following steps: drilling cores, complete rock end face cutting, complete rock samples with different fissure inclination angles And the connection rate is cut and polished. Such as figure 1 As shown, the specimen cracks are d...

AI Technical Summary

Problems solved by technology

[0005] 1) The accuracy of the inclination angle and connectivity rate of the fracture after cutting cannot be guaranteed, and end cracks and side cracks with different length-to-diameter ratios, connectivity rates, and inclination angles cannot be prepared, and accurate cutting of inclination angles of original rock fractures of different sizes cannot be realized , and compared with the present invention, the structure is complex, the operation is cumbersome, the efficiency is low, and the existing mainstream rock cutting equipment cannot be used

[0006] 2) The fractured rock specimens made of similar materials are quite different from the actual rock mass, and the real mechanical parameters of the fractured rock mass cannot be obtained

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