The pseudo-triaxial compression tests and confining pressure reduction tests were carried out for coal specimen strengths in different stress on servo-controlled testing machine.
基于在伺服试验机对煤样的常规三轴压缩和三轴卸围压试验，分析了煤样在不同应力条件下的强度和变形特征。
2
Triaxial creep tests on coal rocks are carried out by Step Method and the XTR01 electric-fluid servo compressionmachine.