Prefabrication method of standard roughness joint surface of rock-like test piece

Abstract

The invention provides a prefabrication method of a standard roughness joint surface of a rock-like test piece, and belongs to rock mechanics test methods. The method comprises the steps that a roughness curve is input in a numerical controlled flame cutting machine to cut stainless steel plates, and standard joint surface mold plates with different roughness are obtained; a mold for making the rough joint surface is obtained through assembling, a joint surface mold plate with the corresponding roughness is selected, and spaces between standard joint mold plates are adjusted according to opening of the prefabricated joint surface; a machining groove is filled with liquid replication materials, and after cooling forming is conducted, replication material joint pieces are obtained through demolding and cutting; the joint pieces are fixed on preset positions of a test piece machining mold, and liquid rock-like materials are injected into the mold; demolding is conducted after forming, the rock-like test piece is subjected to high temperature, the joint pieces are melt and flow out, and the rock-like test piece with the joint surface with specific roughness is obtained. The method has the advantages of being easy and convenient to operate, easy to repeat, low in cost, high in accuracy and the like, and the method has a wide application prospect in test research of physical and mechanical property of rock structure surfaces.

Description

Technical field [0001] The invention relates to an experimental method of rock mechanics, in particular to a method for prefabricating a standard roughness joint surface of a rock-like specimen. Background technique [0002] In the field of rock mechanics and engineering, rock masses are recognized by related scholars and technicians as being composed of a network of complete rock blocks and joints (cracks, structural planes, weak planes or discontinuous planes). The physical and mechanical properties of joint planes are the key factors that control the bearing capacity, permeability and stability of surrounding rocks of engineering rock masses, and have been closely followed by relevant researchers. The surface of joints is generally rough. In 1976, Barton (N. Barton) systematically analyzed the roughness of 136 joints, divided the roughness of all joints into 10 grades, and gave 10 typical roughness profiles. The length is 100mm, and the joint surface roughness coefficient (jo...

AI Technical Summary

Problems solved by technology

However, the existing rough joint surface production methods need to use methods such as laser scanning of the sample surface and 3D printing technology, which have the disadvantages of high requirements for equipment, complicated production process, high cost, and unfavorable popularization. Even if the patent replicates the natural joint surface, it is impossible to prefabricate the joint surface with 10 standard roughness

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