| Numerical study on maximum rebound ratio in blasting wave propagation along radian direction normal to joints |
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| 作者姓名： | 雷卫东 滕军 HEFNY A 赵坚 关炯 |
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| 作者单位： | Department of Urban and Civil Engineering Shenzhen Graduate School Harbin Institute of Technology，Department of Urban and Civil Engineering Shenzhen Graduate School Harbin Institute of Technology，School of Civil and Environmental Engineering Nanyang Technological University，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，Kvaerner E&C Singapore Pte. Ltd. Aker Kvaerner Asia Pacific，Shenzhen 518055 China，Shenzhen 518055 China，Singapore 639798 Singapore，Singapore 118254 Singapore |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 1 INTRODUCTION For one dimensional wave, such as seismic wave, passing across single joint or multiple parallel joints, combining the theory of displacement discontinuities and the method of characteristics, solutions in terms of magnitudes of the reflection ratio and the transmission ratio have been obtained by several researchers1?6] for P-wave and S-wave respectively. However, for a practical dynamic problem in a rock mass involving blasting wave propagation from a tunnel or borehole,…
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| 收稿时间： | 26 April 2006 |
| 修稿时间： | 27 May 2006 |
Numerical study on maximum rebound ratio in blasting wave propagation along radian direction normal to joints |
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| Lei Wei-dong , Teng Jun , Hefny A. , Zhao Jian and Guan Jiong.Numerical study on maximum rebound ratio in blasting wave propagation along radian direction normal to joints[J].Journal of Central South University of Technology,2006,13(6):743-748. |
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| Authors: | Lei Wei-dong Teng Jun Hefny A Zhao Jian and Guan Jiong |
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| Affiliation: | (1) Department of Urban and Civil Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China;(2) School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore;(3) Ecole Polytechnique Federale de Lausanne (EPFL), Rock Mechanics Laboratory, Lausanne, CH-1015, Switzerland;(4) College of Architecture and Civil Engineering, China University of Mining and Technology, Xuzhou, 221008, China;(5) Kvaerner E&C Singapore Pte. Ltd., Aker Kvaerner Asia Pacific, Singapore, 118254, Singapore |
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| Abstract: | 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. |
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| Keywords: | 2-D compressional wave maximum rebound ratio stiffness of joint |
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