The impact of the energy of dynamic phenomena on the character of fracture of mine workings

Abstract

The analysis of the stability of mine workings is carried out, the features of disturbances of rocks stability in the contour zone of the massif depending on the type and energy of the dynamic phenomena, the nature of the distribution of dynamic stresses are determined. Energy classification of dynamic phenomena, showing the nature of the impact of dynamic phenomena on mine workings is compiled. Analysis of dynamic manifestations of rock pressure showed that during the dynamic phenomena of both types, the zone of rock mass disturbance significantly exceeds the size of the focal zone. Disintegration zones may occur around mine workings of deep mines. Formation of these zones around excavations in the ultimate massifs occurs as a result of static circumferential tangential stresses near the excavation contour and dynamic effects from rock bumps and mass explosions by brittle fracture and delamination of the contour massif.