ABSTRACT
Local dynamic phenomena or dynamic disasters such as rockburst, pressure bump and shock bump often take place in the driving face of rock roadway of underground engineering, in which, especially, rockburst occurs frequently. Rockburst is one of geological hazards about dynamic instability in the mining process of underground cavity under high geostress, the cave wall will arise stress differentiation due to unloading function caused by the excavation of surrounding rocks, the elastic strain energy stored in rock mass is released suddenly and at the same time the rock mass will generate burst loose, peeling off, ejection and even throwing phenomenon (Xu & Wang 2000). After the occurrence of rockburst, the crater section of “V” type often appears (Tan 1989, Feng et al. 2012, Chen et al. 2012, Zhou et al. 2015). Rockburst seriously affects the construction schedule of underground excavation works, damages the support and construction equipment and endangers the safety of the workers (Wang et al. 2003). However, due to the complexity of the rockburst phenomenon, it is still one of the worldwide difficult problems of rock mechanics (Zhang & Fu 2008). So far, many experts and scholars have studied the occurrence mechanism of rockburst, and made important
microstructure and deformation of rock (Qian et al. 2004, Qian & Zhou 2013). Academician Wang (2009) also considered that rock contained unreleased sealing stress. Yue (2014, 2015) put forward and tried to demonstrate the fluid inclusion was a specific, real, measurable and computable stress inclusion. He thought the inclusion was a specific form of existence and function of “locked in” stress and strain energy and further analyzed and discussed the fluid inclusions in the rock were the tensile or expanding volumetric force sources of the dynamic disasters of rock in underground engineering.
