STUDY ON EFFECTS OF INITIAL STRESS ON STRESS WAVE PROPAGATION AND BLOCK MOVEMENT LAW
FAN Xin1，2，WANG Mingyang2，SHI Cuncheng1
(1. The Second Artillery Command Academy，Wuhan，Hubei 430012，China；2. Engineering Institute of Engineering Crops， PLA University of Science of Technology，Nanjing，Jiangsu 210007，China)
Abstract：The effect of initial stress on velocity of wave propagation in rock is analyzed by theoretic models and test results. The shapes of stress wave including particle stress，displacement and velocity with different initial stresses under the condition of explosion disturbances are studied by method of numerical simulation，and the basic law of initial stress effect on wave propagation is obtained. The movement model of structural block under the effect of explosion is built. The relative displacement of single block with different initial stresses is studied through increasing calculating and analyzing the numerical model. The results show that：(1) the velocity of wave propagation in rock increases rapidly under low initial stress，and tends to be constant under high initial stress；(2) the radial stress and displacement at the same distance will decrease with increasing of initial stress rapidly，and the wave shape will become narrow；and (3) the relative displacement of single block has inverse ratio to the value of initial stress.
FAN Xin1，2，WANG Mingyang2，SHI Cuncheng1. STUDY ON EFFECTS OF INITIAL STRESS ON STRESS WAVE PROPAGATION AND BLOCK MOVEMENT LAW. , 2009, 28(S2): 3442-3446.
