Abstract:
In order to measure the bursting energy index
KE of coal-rock samples, the method of unloading and loading was exploited and an experimental unit was designed based on it without loop electric-hydraulic servo-controlled fatigue testing machine and stiffness test machine.With this device, the bursting energy index
KE of samples collected from a coal mine of Tonghua Mining Administration was measured.The stress and strain curve was drawn according to experimental data, and it demonstrated the feasibility of the method of unloading and loading.In combination with elastic energy index
WET, dynamic fracture duration
DT and uniaxial compressive strength
Rc, the rock burst of related mine would be judged.