Some Fundamental Issues and Verification of 3DEC in Modeling Wave Propagation in Jointed Rock Masses

摘要

Discontinuities in rock masses greatly influence stress wave transmission. Theoretical and experimental studies on wave propagation across joints have been extensively studied (e.g., Kendall and Tabor 1971; Schoenberg 1980; Pyrak-Nolte et al. 1990; Zhao and Cai 2001; Zhao et al. 2006a, b; Perino et al. 2010; Li and Ma 2010; Li et al. 2010), focusing on the effects of joint stiffness, incident angles, number of joints, and joint spacing on wave propagation.Compared with theoretical and experimental studies, numerical modeling provides a convenient, economical approach to study wave propagation across a jointed rock mass, especially for complicated cases where theoretical solutions are impossible to obtain and experiments are difficult to conduct, such as wave propagation in a rock mass containing several intersecting joint sets and involving multiple tunnel excavation and underground explosions (Zhao et al. 1999).