Normal dynamic deformation characteristics of non-consecutive jointed rock masses under impact loads

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Zeng, Sheng^1 ; Jiang, Bowei^1 ; Sun, Bing^2

Nuclear Resources Engineering College, University of South China, Hengyang

421001, China^1

School of Civil Engineering, University of South China, Hengyang

421001, China^2

关键词: Cement mortars;    Deformation Characteristics;    Dynamic compression;    Dynamic deformation characteristics;    Impact energy;    Intact rock mass;    Jointed rock mass;    Peak intensity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012153/pdf
DOI  :  10.1088/1755-1315/81/1/012153

来源: IOP

【 摘 要 】

In order to study deformation characteristics of non-consecutive single jointed rock masses under impact loads, we used the cement mortar materials to make simulative jointed rock mass samples, and tested the samples under impact loads by the drop hammer. Through analyzing the time-history signal of the force and the displacement, first we find that the dynamic compression displacement of the jointed rock mass is significantly larger than that of the intact jointless rock mass, the compression displacement is positively correlated with the joint length and the impact height. Secondly, the vertical compressive displacement of the jointed rock mass is mainly due to the closure of opening joints under small impact loads. Finally, the peak intensity of the intact rock mass is larger than that of the non-consecutive jointed rock mass and negatively correlated with the joint length under the same impact energy.