Simulation of blast induced crater in jointed rock mass by discontinuous deformation analysis method  

作　　者：Youjun NING Jun YANG Xinmei AN Guowei MA 

机构地区：[1]School of Civil and Environmental Engineering,Nanyang Technological University,Singapore 639798,Singapore [2]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China [3]School of Civil and Resource Engineering,University of Western Australia,35 Stirling Highway,Crawley WA 6009,Australia

出　　处：《Frontiers of Structural and Civil Engineering》2010年第2期223-232,共10页结构与土木工程前沿（英文版）

摘　　要：Rock blasting is a dynamic process accom panied with the propagations of shock waves and the dispersion of the explosion gas.This paper adopts the discontinuous deformation analysis(DDA)method to simulate the rock blasting process.A dynamic parameter adjustment and the non-reflecting boundary condition are implemented in the DDA method.The sub-block DDA method to simulate fracture problems is used.The blasting process in jointed rock mass is simulated by application of the explosion gas pressure on the expanding borehole walls and induced connected fracture surfaces around the boreholes.The blast craters with different overburdens are derived.The whole process including the explosion gas dispersion,borehole expansion,rock mass failure and cast,and the formation of the final blasting piles in rock blasting are well reproduced numerically.Parametric study for different overburdens is carried out,and the results are analyzed and discussed.

关 键 词：blast crater jointed rock mass explosion gas pressure discontinuous deformation analysis(DDA)method 

分 类 号：TD2[矿业工程—矿井建设]