Evaluation of the propensity of strain burst in brittle granite based on post-peak energy analysis

The increasing demand for resources and depletion of near ground mineral caused deeper mining operations under high-stress rock mass conditions. As a result this, strain burst, which is the sudden release stored energy in surrounding mass, has become more prevalent created considerable threat to workers construction equipment. It is, therefore, imperative understand how burst mechanism excess are affected due high confinement deep underground For this purpose, post-peak distributions brittle rocks were investigated using newly developed calculation method associated with acoustic emission (AE). A series quasi-static uniaxial triaxial compression tests controlled by circumferential expansion conducted. Snap-back behaviour known as Class-II evolution material response self-sustaining failure analysed on granites wide range confining pressures (0–60 MPa). experimental results underline that characteristics strongly linked confinement. Stored elastic ( d U E ), consumed dominating cohesion weakening Φ C W ) dissipated during mobilisation frictional F M showed rising trend pressure was increased. An intrinsic ejection velocity proposed express propensity purely determined released from Class II rock.