Tomography of the dynamic stress coefficient for stress wave prediction in sedimentary rock layer under the mining additional stress

作     者：Wenlong Shen Guocang Shi Yungang Wang Jianbiao Bai Ruifeng Zhang Xiangyu Wang Wenlong Shen;Guocang Shi;Yungang Wang;Jianbiao Bai;Ruifeng Zhang;Xiangyu Wang

作者机构：Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral ResourcesSchool of Energy Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000China Key Laboratory of Deep Coal Resource Mining Ministry of EducationState Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyXuzhou 221116China Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency UtilizationJiaozuo 454000China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2021年第31卷第4期

页      面：653-663页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 0709[理学-地质学] 0808[工学-电气工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.51804099 and U1704129) the Focus Research and Special Development for Scientific and Technological Project of Henan Province(No.202102310542) the Fundamental Research Funds for the Central Universities(No.2018ZDPY02ZDPY02) the research fund of State Key Laboratory of Coal Resources and Safe Mining,CUMT(SKLCRSM19KF011). 

主　　题：Tomography of the dynamic stress coefficient Stress wave attenuation Mining additional stress Sedimentary rock layer 

摘      要：In this study,the tomography of dynamic stress coefficient(TDSC)was established based on a mechanical model of stress wave propagation in bedding planes and a mathematical model of the stress wave attenuation in rock masses.The reliability of the TDSC was verified by a linear bedding plane model and field monitoring.Generally,the TDSC in the dynamic stress propagation of bedding planes increases with the following conditions:(1)the increase of the normal stiffness of the bedding plane,(2)the increase of the incident angle of the stress wave,(3)the decrease of the incident frequency of the stress wave,or(4)the growth of three ratios(the ratios of rock densities,elastic moduli,and the Poisson’s ratios)of rocks on either side of bedding planes.The additional stress weakens TDSC linearly and slowly during the stress wave propagation in bedding planes,and the weakening effect increases with the growth of the three ratios.Besides,the TDSC decreases exponentially in the rock mass as propagation distance increases.In a field case,the TDSC decreases significantly as vertical and horizontal distances increase and its wave range increases as vertical distance increases in the sedimentary rock layers.