Numerical study on maximum rebound ratio in blasting wave propagation along radian direction normal to joints  

作　　者：雷卫东 滕军 HEFNY A 赵坚 关炯 

机构地区：[1]Department of Urban and Civil Engineering, Shenzhen Graduate School, Harbin Institute of Technology [2]School of Civil and Environmental Engineering, Nanyang Technological University [3]Ecole Polytechnique Federale de Lausanne (EPFL), Rock Mechanics Laboratory, Lausanne CH-1015, Switzerland College of Architecture and Civil Engineering, China University of Mining and Technology, Xuzhou 221008, China [4]Kvaerner E&C Singapore Pte. Ltd., Aker Kvaerner Asia Pacific

出　　处：《Journal of Central South University of Technology》2006年第6期743-748,共6页中南工业大学学报（英文版）

基　　金：Projects(50278057) supported by the National Natural Science Foundation of China; project(2002CB412703) supported by Major State Basic Research Development Program of China

摘　　要：In the process of 2-D compressional wave propagation in a rock mass with multiple parallel joints along the radian direction normal to the joints, the maximum possible wave amplitude corresponding to the points between the two adjacent joints in the joint set is controlled by superposition of the multiple transmitted and the reflected waves, measured by the maximum rebound ratio. Parametric studies on the maximum rebound ratio along the radian direction normal to the joints were performed in universal distinct element code. The results show that the maximum rebound ratio is influenced by three factors, i.e., the normalized normal stiffness of joints, the ratio of joint spacing to wavelength and the joint from which the wave rebounds. The relationship between the maximum rebound ratio and the influence factors is generalized into five charts. Those charts can be used as the prediction model for estimating the maximum rebound ratio.In the process of 2-D compressional wave propagation in a rock mass with multiple parallel joints along the radian direction normal to the joints, the maximum possible wave amplitude corresponding to the points between the two adjacent joints in the joint set is controlled by superposition of the multiple transmitted and the reflected waves, measured by the maximum rebound ratio. Parametric studies on the maximum rebound ratio along the radian direction normal to the joints were performed in universal distinct element code. The. results show that the maximum rebound ratio is influenced by three factors, i.e., the normalized normal stiffness of joints, the ratio of joint spacing to wavelength and the joint from which the wave rebounds. The relationship between the maximum rebound ratio and the influence factors is generalized into five charts. Those charts can be used as the prediction model for estimating the maximum rebound ratio.

关 键 词：2-D compressional wave maximum rebound ratio stiffness of joint 

分 类 号：TD235[矿业工程—矿井建设]