Research on Blasting Damage Control of 90° Slit Charge Structure

被引：0
|
作者：
Xiao, Chenglong [1 ,2 ]
Shi, Guoli [3 ]
Zhao, Zhiwei [1 ,2 ]
Ding, Chenxi [4 ,5 ]
机构：
[1] Beijing Inst Technol, Sch Mechatron Engn, Beijing, Peoples R China
[2] Beijing Inst Technol Beijing, State Key Lab Explos Sci & Technol, Beijing, Peoples R China
[3] China Minmetals Corp, Beijing, Peoples R China
[4] Univ Sci & Technol Beijing, Civil & Resource Engn Sch, Beijing, Peoples R China
[5] State Key Lab Safety & Hlth Met Mines, Maanshan, Peoples R China
来源：
MINING METALLURGY & EXPLORATION | 2024年 / 41卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Blasting damage; Slit charge structure; Dynamic fracture; Fractal dimension; Polymethyl methacrylate; NUMERICAL-SIMULATION; ROCK DAMAGE; INITIATION; STABILITY;
D O I：
10.1007/s42461-024-00922-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
This study investigates the directional blasting of a 90 degrees slit charge structure using laboratory experiments and field tests. A 90 degrees slit charge suitable for the corner of roadway is proposed. After the slit charge blasting, two long main cracks along the slit, and several short secondary cracks in other directions. The slit charge not only significantly reduces damage to the surrounding rock, but also improves the quality of the roadway contour. In addition, a comprehensive damage evaluation system of the roadway contour and the surrounding rock is constructed using digital image analysis, borehole televiewer, and CT scanning.
引用
收藏
页码：1325 / 1335
页数：11
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