A SEEPAGE-CREEP AND MECHANICAL EXPERIMENTAL SYSTEM FOR COAL AND ROCK MASS CONTAINING GAS UNDER TRIAXIAL LOADING IN LOW-TEMPERATURE ENVIRONMENT

摘要

A seepage-creep and mechanical experimental system for coal and rock mass containing gas under triaxial loading in low-temperature environment. The system includes a gas booster system, a pressure measurement system, a core holder (20) and a triaxial pressure control system. The system can simulate seepage-creep and mechanical evolution process of coal and rock mass in low-temperature environment under the condition of real formations. Meanwhile, it provides an experimental platform for simulating the extraction of gas or shale gas under triaxial loading from coal and rock mass by increasing permeability through fracturing at low temperature. Furthermore, the system can be used to quantitatively study physical property parameters of frozen in-situ coal and rock mass, providing scientific experimental data and theoretical bases for field application of coal seams with permeability improved through fracturing at low temperature.