... Abstract Characteristics of stress evolution of "roof-coal" structure body lose stability process under force and rock burst preparation is analyzed by comparative test. Catastrophe theory is used to analysis instability mechanism and the multi-field stress control for rock burst prevention...

... ABSTRACT For a long time, mining coal under buildings, water bodies and railways ("under three" for short) mainly apply technology of strip mining in China, whose effect of ground subsidence control is good, but coal recovery is low (about 40%). As coal resources has been decreasing, whether...