A device and method for preparing rock test pieces with different fracture positions, inclination angles and connectivity ratios

Abstract

The invention belongs to the field of rock mechanics and provides a device and a method for preparing rock test pieces with different crack positions, inclination angles and connectivity ratios. A device for preparing rock test pieces with different fracture positions, inclination angles and connectivity ratios, comprising: a base, a connectivity ratio cutting control component, and an end-face fracture inclination angle cutting control component. The base has a T-shaped chute and is engraved with a scale; the connectivity rate cutting control component is a mechanical lifting device; the connectivity rate cutting control component is slidingly connected with the base; the end face crack inclination cutting control component includes the crack inclination cutting control component and the complete The rock fixing component; the end face fissure inclination angle cutting control component is fixedly connected with the connectivity rate cutting control component. The device and method of the present invention can satisfy rock sample preparation with different fracture positions, different fracture inclination angles and different connectivity ratios by adjusting the device components, which improves the preparation accuracy of fractured proto-rock rock samples, has a unique structure, a reasonable structure, and is easy to operate. Durable and other advantages.

Description

technical field [0001] The invention belongs to the field of rock mechanics, and in particular relates to a device and a method for preparing rock test pieces with different crack positions, inclination angles and connectivity ratios. Background technique [0002] There are a large number of fractured rock masses in nature. The initial defect is one of the important factors for rock fracture and instability. The crack initiation, expansion, and penetration around the initial defect, leading to failure, is an important manifestation of the failure of rock-like brittle materials. The preparation of rock samples with different fracture positions, different fracture inclinations, different connectivity rates and different aspect ratios in the laboratory usually requires the following steps: drilling cores, complete rock sample end cutting, complete rock samples with different fracture inclinations Cutting and grinding with connectivity rate. Such as figure 1 As shown, the crac...

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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