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Numerical Simulation of Fracture Mechanism by Blasting using PFC2D  

Jong, Yong-Hun (BK21 서울대학교 에너지자원 인력양성사업단)
Lee, Chung-In (서울대학교 지구환경시스템공학부)
Jeon, Seok-Won (서울대학교 지구환경시스템공학부)
Publication Information
Tunnel and Underground Space / v.16, no.6, 2006 , pp. 476-485 More about this Journal
Abstract
During blasting, both shock wave and gas are generated in detonation process of explosives and the generated wave and gas expansion may create new fractures and damage rock mass. In order to explain and understand completely the fracture mechanism by blasting, we have to consider both effects of the wave and gas expansion simultaneously. In this study, we use a discrete element code, PFC2D and develop an algorithm which is capable of modeling both detonation and gas pressures acting on blasthole wall and visualizing generated cracks within rock mass. Moreover, the gas-pressure modeling method which applies a corresponding external force of gas pressure to parent particles of radial fractures is adopted to simulate a coopting between rock mass and gas penetrating created radial fractures. The developed algorithm is verified by reproducing numerical simulations of a lab-scale test blast successfully.
Keywords
PFC2D; Blasting; Fracture mechanism; Numerical simulation; Detonation pressure; Gas pressure;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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