Fracture Characteristics of Intermittent Jointed Rock Masses under Blast Loading

Peng shao Yu Qi Wu; Yong Zhang; Yong Nian He

doi:10.4028/www.scientific.net/KEM.297-300.2660

Paper Titles

Fracture Behavior and Water Migration in Heterogeneous and Porous Rocks
p.2636

Experimental Study on the Mechanical Characteristics of Cracked Rockmass under Lateral Constraints
p.2642

Numerical Studies of the Influence of Heterogeneity on Rock Failure and Induced Earthquake Precursors
p.2648

Numerical Simulation of Crack Development in Reinforced Concrete Structures under Eccentric Loading
p.2654

Fracture Characteristics of Intermittent Jointed Rock Masses under Blast Loading
p.2660

Adjustment for Temperature and Deformation of Concrete Beams
p.2667

Web-Based Expert System in Fatigue and Fracture Analysis
p.2675

Development of Integrated Materials Database System for Plant Facilities Maintenance & Optimization
p.2681

Risk-Based Inspection of Refinery Units: A Practical Application
p.2687

HomeKey Engineering MaterialsKey Engineering Materials Vols. 297-300Fracture Characteristics of Intermittent Jointed...

Fracture Characteristics of Intermittent Jointed Rock Masses under Blast Loading

Abstract:

Rock masses usually contain intermittent joints. The existence of joints not only significantly affects the static properties of rock masses, but also their dynamic response and stability under blast waves. The present study focuses on investigating the fundamental fracture characteristics of intermittent jointed rock masses subjected to blast loading. A series of blasting tests were conducted on organic glass samples. The results are analyzed in order to obtain the characteristics of initiation, propagation and coalescence of wing cracks in rock bridges. The study indicates that the fracture behavior of intermittent jointed rock masses may be significantly affected by the preliminary static stress fields, the density and filling states of rock joints, the incident angles of blast waves relative to the joints, and the amplitudes of incident waves. From visual observation, three initiation modes and four coalescence modes of wing cracks are suggested. Finally, a comparison has been made between the fracture characteristics of intermittent jointed rock masses under single static stress field and that of under blast loading.