Layered rock thin plate-shaped sample production and loading method

Abstract

The invention relates to a layered rock thin plate-shaped sample production and loading method. A sample production stage comprises the following steps: preparing a cylindrical rock sample by utilizing a drilling machine, preparing a rock cylindrical sample with scale height by utilizing a cutting machine, sequentially preparing a rectangular solid rock sample and a thin plate-shaped sample by utilizing a wire cutting machine, fixing the thin plate-shaped sample into a matched polishing fixture, and polishing the thin plate-shaped sample by utilizing a grinding and polishing machine until design dimensions are met. A sample loading stage comprises the following steps: cleaning and drying the thin plate-shaped sample, and performing an anti-friction agent operation on a loading surface of the thin plate-shaped sample; fixing a ball head loading mechanism on a lower pressing head of a press, sequentially fixing a rigid base plate and a sample locating cover at the top of the ball head loading mechanism, inserting the loading surface of the thin plate-shaped sample into a location slot of the locating cover, and adjusting a position of the thin plate-shaped sample to be centered withthe ball head loading mechanism; applying a pre-tightening force to the thin plate-shaped sample to a set value in a displacement / load control mode; and after the pre-tightening force is reset, applying load to the thin plate-shaped sample in a displacement control mode until the thin plate-shaped sample is destroyed.

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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