Characterization of true triaxial rock bursts in sandstones with different water contents

The rockburst phenomenon occurs in dry red sandstone under high situ stress, and the effect is weaker for a water-bearing rock. on with different water contents analyzed this paper. A true triaxial testing machine used to conduct loading, acoustic emission recording equipment high-speed camera are monitor signal inside rock rock-caving situation throughout entire process order analyze characteristics of emissions ejection form rockburst. results show that 50% saturated but not sandstone. phrase stress–strain curve vary more significantly than those rock, elastic strain energy decreases gradually as content increases. double peak during failure transitions stepped pattern ejected fragments abundant large. test illustrate characteristic contents, reveal mode demonstrate influence study provide theoretical reference mechanisms similar hard rocks.