ABSTRACT

Rockburst is dynamic disaster phenomena of coal and rock system energy instantaneous release induced by mining engineering activity. In order to study the mechanism of rockburst under tectonic stress field, stress measurement and analysis was taken in some rockburst mines applied hollow inclusion geo-stress measurement methods, the horizontal tectonic stress field was determined, and the relationships between stress concentration factor K1, K2, K3 and γ h was derived. Based on the theory of elastic mechanics, the spherical body dynamical system of rockburst under the tectonic stress field was established, the relationship between dynamical system energy of rockburst and mining depth, property of coal and rock, earthquake magnitude, scale radius was analyzed. Field application practice shows that dynamical system energy of rockburst has the characteristics of transmission, storage, release and supplementation. The study of dynamical system of rockburst offered referenced thinking for implementation of relieving danger measures, relieving danger timeliness and effectiveness analyzes, and it is very important for the treatment of rockburst.