Simulation and Parameters Optimization of Medium Deep Hole Blasting in Steeply Narrow Vein Mine Under Confinement

被引：0

作者：

An, Long ^{[1
,2
]}

Zhang, Jia-Hua ^{[1
]}

Li, Yuan-Hui ^{[1
]}

Han, Lin ^{[1
]}

机构：

[1] Key Laboratory of Ministry of Education for Safe Mining of Deep Metal Mines, Northeastern University, Shenyang,110819, China

[2] Shandong Gold Group Co., Ltd., Jinan,250101, China

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2022年 / 43卷 / 04期

关键词：

Vibration analysis - Numerical models - Numerical methods;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Taking the medium deep hole mining in steeply narrow vein of a gold mine in Inner Mongolia as the engineering background, through empirical analogies, numerical simulation and field tests methods, the evolution law of cracks in narrow veins of deep hole blasting under different blasting parameters was analyzed, and the relationship between the blasting parameters and the over-under-excavation percentage of blasting, the density of blasting cracks and the vibration velocity of the surrounding rock particles is obtained. The results show that: when the hole spacing is 1.2~1.4 m, the over-under-excavation blasting area tends to be zero. When the burdern is 0.8~1.0 m, the blasting fragmentation is more uniform. A burden of 1.0 m and a hole spacing of 1.2 m can be taken as optimal parameters during deep hole blasting. The field blasting test also verifies the research results of this paper. © 2022, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：567 / 574