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Chapter 1 Introduction1.1 Rock and Its Mechanical Behavior1.2 Dynamic Loading and Dynamic Behavior of Rock Masses1.3 Numerical Modeling in Rock Engineering1.4 Challenges in Discrete Element Modeling of Explosion ProblemsChapter 2 Mechanical and Dynamic Behavior of Rock Masses2.1 Overview of Rock Masses2.2 Mechanical Behavior of Jointed Rock Masses2.3 Dynamic Response of Jointed Rock MassesChapter 3 Discrete Element Modeling3.1 Review of Discrete Element Method3.2 Comparison Between Continuum-based Method and DEM3.3 The UDEC Code3.4 Considerations in Dynamic Modeling by Using the UDECChapter 4 Applications of UDEC for Static Problems4.1 Application of UDEC in Rock Tunnel Support Evaluation4.2 Application of UDEC in Modeling Hole-cutting in Deep Tunneling4.3 Application of UDEC on Goaf Stability Under a Desert Expressway4.4 Application of UDEC for Analysis of Large Rock DeformationChapter 5 Applications of UDEC for Rock Dynamic Problems5.1 Mesh Distortion in Dynamic Modeling5.2 Verification of UDEC in Modeling Wave Propagation Through Joints5.3 Wave Transmission Across Multiple Joint SetsChapter 6 Applications of UDEC Blast Wave Through Rock Tunnels6.1 Technology of Coupled UDEC and AUTODYN Modeling6.2 An Example of Using the Coupled Method6.3 UDEC-AUTODYN Hybrid Modeling a Field Explosion Test6.4 UDEC-AUTODYN Hybrid Modeling of a Large-Scale Underground Explosion Test6.5 Numerical Study on Tunnel Damage Subject to Blast-induced Shock Wave in Jointed Rock MassesChapter 7 3DEC Modeling of Slope Stability at Norwich Part Mine7.1 Introduction7.2 Computational Model and Rock Properties7.3 Modeling Cases and Results7.4 ConclusionsChapter 8 3DEC Modeling of Wave Propagation in Jointed Rock Masses8.1 2D Equivalence of 3D Plane Wave Propagation Across a Single Joint and a Joint Set8.2 Determination of Mesh Size8.3 Verification on 2D Equivalence of Plane Wave Propagation Across a Single Joint with 3DEC8.4 Normally Incident P- and S-wave Across a Single Joint and a Joint Set8.5 Obliquely Incident P-wave Across a Single Joint and a Joint Set8.6 A Case Study8.7 Discussion and ConclusionsReference