EFFECT OF ENERGY TRANSFORMATIONS ON FAILURE MODE OF BRITTLE ROCKS

摘要

Different energy transformations canbring about different failure mode in brittle rocks.The effect law was investigated from two aspects i.e.rock fragmentation and rupture intensity.Suppose rock fragments are medial balls with same volumes, and the relationship between the number of rock fragments and dissipated energy as well as the one between the velocity of rock fragments and elastic energy were established respectively, and the results show that the more the dissipated energy is, the larger the number of rock fragments,the smaller the size of rock fragments,and the greater the fractal dimension of fragments.The velocity of rock fragments becomes larger when the ratio of elastic energy increases,and a nonlinear relationship behaves between them.In short,the dissipated energy decides the rock fragmentation, while the residual elastic energy after failure decides the rupture intensity.