Analysis of unstable block by discrete element method during blasting excavation of fractured rock mass in underground mine

被引：10
|
作者：
Gu, Zhongyuan [1 ]
Cao, Miaocong [1 ]
机构：
[1] Changchun Inst Technol, Sch Invest & Surveying Engn, Changchun 130021, Peoples R China
来源：
HELIYON | 2023年 / 9卷 / 11期
关键词：
Fractured rock mass; Blasting disturbance; Dangerous block; 3DEC; DISCONTINUITIES; STABILITY;
D O I：
10.1016/j.heliyon.2023.e22558
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
During the excavation process in fractured rock masses in underground mines, blasting excavation can cause dangerous block collapses on surrounding rock. The applicable blasting method can effectively reduce the damage of surrounding rock caused by blasting disturbance. In order to investigate the impact of blasting disturbances of dangerous blocks in fractured rock mass drift, this study focuses on the instability characteristics of dangerous blocks during the excavation process in a mine located in Jilin Province. Based on detailed detection of discontinuities char-acteristics in the study area, the damage effects of shaped charge hydraulic blasting and con-ventional blasting on surrounding rock structure are analyzed and compared by using equivalent static method. The 3DEC discrete element software was used to analyze the instability characteristics of surrounding rock dangerous blocks under these two different blasting methods. The results indicate that using shaped charge hydraulic blasting can effectively reduce the impact of blasting disturbances on the excavated rock mass and minimize dangerous block collapses during drift excavation.
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收藏
页数：11
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