TRUE TRIAXIAL TEST SYSTEM FOR HIGH-PRESSURE HARD ROCK BROADBAND LOW-AMPLITUDE SURFACE DISTURBANCES

摘要

A true triaxial test system for high-pressure hard rock broadband low-amplitude surface disturbances, comprising a low-frequency disturbance true-triaxial mechanism (I), a variable frequency slow-disturbance rod mechanism (II) and a quick single-side unloading sample cell (III), the low-frequency disturbance true-triaxial mechanism (I) and the variable-frequency slow-disturbance rod mechanism (II) being distributed along a straight line, the low-frequency disturbance true-triaxial mechanism (I) being used alone or used in cooperation with the variable-frequency slow-disturbance rod mechanism (II), and the quick single-side unloading sample cell (III) being used in cooperation with the low-frequency disturbance true-triaxial mechanism (I). Said system can simulate, from the perspective of an indoor test, a surface disturbance loading action process of a rock body under a high static stress loading, of which the frequency range of a disturbance wave is in the range of 0 to 20 Hz, such as blasting seismic waves, disturbance waves generated by large-scale rock blasting and fault slipping, implement the simulation of a low stress amplitude feature by means of low speed firing of bullets, and implement the simulation of a specific frequency feature by means of rod splicing; furthermore, the rod splicing manner shortens the length of a device, and saves the floor space of the device, reducing the difficulty in selecting a test site, and enabling the installation and maintenance of the device to be easier.