Dynamic Response Characteristics on Both Sides of the Filling Body in Difficult Mining Stope by Using Deep Hole Blasting

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Xie, Chengyu^1 ; Jia, Nan^2 ; Shi, Dongping^1 ; Wang, Xinfeng^1 ; Zhang, Xiaoqiang^1 ; He, Liwen^1

School of Environment and Resources, Xiang Tan University, Xiang tan, China^1

Institute of Public Safety, Tsinghua University, Beijing, China^2

关键词: Blasting vibration velocities;    Blasting vibrations;    Deep hole blasting;    Dynamic response characteristics;    Dynamic response simulation;    Dynamic tensile strength;    Engineering practices;    Explosive stress waves;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022063/pdf
DOI  :  10.1088/1755-1315/170/2/022063

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

It was complicated and difficult for blasting vibration controlling when applying deep hole blasting in the ore body filled with filling method, especially when the two sides of the filling body was unstable. Take one lead-zinc mine engineering practice as case, the dynamic response dynamic response simulation numerical model of deep whole blasting was constructed by nonlinear dynamic software LS-DYNA, and five feasible side whole charge structures were proposed in order to analyse laws of explosive stress wave transmissed in filling body. The result shows that: "scaling" phenomenon did not occur in two sides of stope when tensile stress is less of dynamic tensile strength; blasting stress distribution tends to be more uniform when the air separation factor is 0.528; the speed and stress of blasting vibration reach the maximum value from pack center of the projection position of the filling body when blasting vibration velocity and stress are superimposed; the optimal blasting effect was getting when air interval as 1 meter. Field experiments show that, the effect of blasting vibration on the two-sides of fillings can be controlled by optimized edge-loading structure.