Dynamic Behaviors of Rock with Initial Damage under Blasting Load

摘要：

There are many faults in underground rock mass, and they can be considered as initial damage. In mine explosion, the dynamic behaviors of rock with initial damage are always perplexing. Using cement mortar including plastic foam to simulate the rock with initial damage, a series of impact tests were carried out with Hopkinson bars apparatus. Two kinds of dynamic damage evolution models were put forward and the corresponding constitutive models were derived. In these models, isotropic and orthotropic damages were assumed, respectively. Then the parameters in models were fitted with the experiment results. It was found the constitutive model of the orthotropic damage is more suitable to describe the dynamic behaviors of the rock with initial damage.

关键词： mining rock with initial damage blasting SHPB dynamic constitutive model

作者: CUI Xinzhuang YAO Zhanyong JIN Qing

作者单位: School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;China Institute of W School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China

会议类型: 国际会议

会议名称: The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)

会议地点: 河南焦作

会议语种:英文

页码: 852-855

在线出版日期: 2007-04-17（万方平台首次上网日期，不代表论文的发表时间）