Development and preliminary application of true triaxial deep rock mechanics testing system
ZUO Jianping
MA Zongyu
JIANG Yiming
JIAO Zhuokai
ZHAN Shuaifei
Abstract：As coal mining progresses deeper,the characteristics of high stress and high temper-ature become more pronounced in deep mining.A true triaxial deep rock mechanics test system has been developed to investigate the rock mechanics characteristics and roadway failure mech-anisms under high stress and high temperature.The specimen size used in this device is 100 mm× 100 mm× 100 mm.It can provide a maximum force of 2100 kN and a temperature of 150℃.The apparatus can simulate complex environments characterized by high stress and high temperatures.The following research and development have been carried out to address the de-fects of difficult synchronization and easy eccentricity during loading of the true triaxial testing device,as well as uneven heating of the sample:A dual actuator with the same origin has been designed,which automatically aligns and achieves synchronous mechanical loading of any size combination load in three directions;Heating rock samples by generating thermal radiation through heating a closed pressure chamber.Two special designs solve two technical problems in the field of real-time high-temperature true three-axis loading.Based on this system,pre-liminary tests were conducted on the mechanical properties of rock loading and unloading,as well as simulation tests on tunnel failure at different stress angles.The good experimental ac-curacy and rich scalability of the system have been verified.The research and development de-vice provides a reliable experimental basis for rock mechanics research and geological hazard prevention under complex deep conditions.
Keywords：development of true triaxial apparatushigh temperature and pressure couplingthree-dimensional stressdeep miningrock mechanics
Publication Date：2025-11-30
Online Publishing Date：2026-01-09(First online date of this platform, not the publication date of the document)
Pages：17( 1371-1387 )