Evolution of blast-induced rock damage and fragmentation prediction

摘要：

A detailed understanding of blasting induced rock damage and fragmentation process is important to blasting design and parameter optimization. Due to the complexity of rock property and damage evolution, it is useful to deal with such problems through statistical methods. In this study, according to the critical fracture characteristic and the relationship between crack density and damage variable, a damage evolution equation under statistical damage mechanics network is suggested by considering the effect of loading rate and initial damage in rock. Based on percolation theory and renormalization group method, critical property of rock damage is analyzed. In order to give a quantitative description for the distribution of fragments, a fractal analysis of damage accumulation is made, and a fractal prediction method of fragmentation resulting from rock blasting is presented.

关键词： blast-induced rock damage damage evolution fragmentation prediction fractal critical damage

作者: Shao Peng Xu Zhi-wei Zhang Hou-quan He Yong-nian

作者单位: State Key Laboratory for Geomechanics &Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221008, China School of Architecture &Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China

会议类型: 国际会议

会议名称: The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)

会议地点: 徐州

会议语种:英文

页码: 1-7

在线出版日期: 2009-10-18（万方平台首次上网日期，不代表论文的发表时间）