TESTING DEVICE AND METHOD FOR PERFORMING PROGRESSIVE FAILURE SIMULATION ON MINING-AFFECTED ROCK MASS

摘要

A testing device and method for performing progressive failure simulation on a mining-affected rock mass, relating to the technical field of rock mass mechanical testing devices, and resolving the technical issue of simulating a progressive failure process of a rock mass under mining-induced stress. The testing device comprises a flexible loading device (1) and a lateral pressure conversion device (2). The flexible loading device (1) comprises passive bearing cylinders (11), an axial pressure bearing plate (12), an axial pressure sensor (14), and an axial displacement sensor (15). The axial pressure sensor (14) and the axial displacement sensor (15) are used to monitor load and deformation of each of the passive bearing cylinders (11). The lateral pressure conversion device (2) comprises a fixed frame (21), a fixed plate (22), a triangular block combination (23), a lateral pressure bearing plate (24), and a lateral pressure sensor (25). The lateral pressure conversion device (2) converts an axial load into lateral pressure so as to apply lateral pressure. Also disclosed is a method employing the device to perform progressive failure testing on a mining-affected rock mass. The invention achieves flexible loading and axial non-uniform loading on a rock surface, is easy to operate, and reduces testing costs.