Numerical Simulation of Block Throw and Fragment Size Forecast of Rock Blasting by DDA Method

摘要：

Hock throw and fragment size forecast are two important aspects of numerical simulation of rock blasting, which are also two difficulties for most numerical methods. DDA (Discontinuous Deformation Analysis) is a newly developed numerical method, which meets the characteristics of rock blasting: continuous and discontinuous mediums, large deformation and large displacement with both statics and dynamics. By improving the initial edition of 2D-DDA code with calculation of damping and suppositional cracks and a temporary way of boundary treatment with artificial boundary blocks, the problems of energy dissipation and stress wave reflection at finite boundaries in rock blasting simulation are solved and fragment size can be forecasted. A typical rock bench blasting is calculated, in which the block throw process is displayed numerically and the fragment size curve and fragment distribution condition are obtained.

关键词： rock blasting block throw fragment size forecast DDA numerical simulation

作者: NING Youjun YANG Jun

作者单位: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China

会议类型: 国际会议

会议名称: The Asian-Pacific Symposium on Blasting Techniques(亚洲太平洋地区爆破技术研讨会)

会议地点: 昆明

会议语种:英文

页码: 80-84

在线出版日期: 2007-05-08（万方平台首次上网日期，不代表论文的发表时间）