Fabrication and loading method of a layered rock thin plate sample

Abstract

A layered rock thin plate sample preparation and loading method, the sample preparation stage steps are: using a drilling rig to prepare a cylindrical rock sample, using a cutting machine to prepare an elevation rock column sample, using a wire cutting machine to sequentially prepare a cuboid rock sample and a thin plate For the sample, fix the thin plate sample in the matching grinding fixture, and use a grinding and polishing machine to grind the thin plate sample until it meets the design size specifications. The steps in the sample loading stage are: cleaning and drying the thin plate sample, and applying friction reducer to the loading surface of the thin plate sample; fixing the ball head loading mechanism on the lower head of the press, and fixing the rigid pads on the top of the ball head loading mechanism in turn Plate and sample positioning cover, insert the loading surface end of the thin plate sample into the positioning slot of the positioning cover, adjust the position of the thin plate sample so that it is centered with the ball head loading mechanism; the thin plate sample is controlled by displacement / load The pre-tightening force is loaded to the set value; after the pre-tightening force is reset to zero, the thin-plate sample is loaded by displacement control until failure.

Description

technical field [0001] The invention belongs to the technical field of rock mass engineering, in particular to a method for making and loading a layered rock sheet sample. Background technique [0002] In the fields of mining engineering, water conservancy and hydropower engineering, tunnel engineering, underground oil and gas storage engineering and other fields, the surrounding rock mass is mostly layered rock, and the rock mass failure caused by these engineering activities is related to the mechanical properties of the layered rock. Anisotropic features are closely related. In most cases, the damage degree of layered rock is affected by its structure, and the damage of deep hard rock is more the result of the joint action of stress and structure, and the bedding structure plane of layered rock is largely regarded as a weak plane , which will affect and control the failure form and intensity of surrounding rock. [0003] The macro-deformation and failure of rock is a pr...

AI Technical Summary

Problems solved by technology

[0005] Because the bedding of layered rocks is affected by factors such as the directional arrangement of minerals and composition differences, it often develops into a weak plane, so the strength is small, and under the disturbance of external factors, damage and destruction along the bedding direction are prone to occur, so the bedding It is difficult to process small-scale thin-plate samples of rock-like rocks

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