IMMEDIATE ROCKBURST TENDENCY GRADE DISCRIMINATION METHOD

• Main Authors: MA, Yuankai, CHANG, Ningdong, LI, Conghao, MA, Yuting, MIAO, Shengjun, ZHAO, Ziqi, LIU, Zejing
• Format: Patent
• Language: English
• Published: 25.09.2024

The present invention discloses an immediate rockburst tendency grade discrimination method, and belongs to the field of rockburst tendency grade discrimination. The method comprises the following steps: preparing a rock sample; performing a triaxial compression test on the rock sample with a confining pressure equal to 0%, 50%, 100%, 150% and 200% of an absolute value of a third principal stress for discriminating a crustal stress of a to-be-evaluated area to obtain a ratio of a shear strength and a compressive strength of the rock and an expansion buffer coefficient of the rock; performing a triaxial cyclic loading and unloading damage control test on the rock sample to obtain triaxial grading cyclic loading and unloading axial and lateral stress-strain curves corresponding to the rock sample, and calculating to obtain an elastic energy storage coefficient of the rock and an energy consumption release coefficient of the rock; calculating to obtain an immediate rockburst tendency coefficient based on the ratio of the shear strength to the compressive strength of the rock, the expansion buffer coefficient of the rock, the elastic energy storage coefficient of the rock and the energy consumption release coefficient of the rock; and discriminating the immediate rockburst tendency grade of the to-be-evaluated area, so that the immediate rockburst tendency grade discrimination is achieved.