Blasting methods for heterogeneous rocks in hillside open-pit mines with high and steep slopes

被引:0
|
作者
Chen, Y. J. [1 ]
Chang, Z. G. [1 ]
Chao, X. H. [1 ]
Zhao, J. F. [2 ]
机构
[1] Xinjiang Inst Engn, Dept Min, Urumqi 830000, Peoples R China
[2] Xinjiang Hong Shun Min Investment Co Ltd, Urumqi 830054, Peoples R China
来源
2017 GLOBAL CONFERENCE ON POLYMER AND COMPOSITE MATERIALS (PCM 2017) | 2017年 / 213卷
基金
中国国家自然科学基金;
关键词
D O I
10.1088/1757-899X/213/1/012006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the arid desert areas in Xinjiang, most limestone quarries are hillside open-pit mines (OPMs) where the limestone is hard, heterogeneous, and fractured, and can be easily broken into large blocks by blasting. This study tried to find effective technical methods for blasting heterogeneous rocks in such quarries based on an investigation into existing problems encountered in actual mining at Hongshun Limestone Quarry in Xinjiang. This study provided blasting schemes for hillside OPMs with different heights and slopes. These schemes involve the use of vertical deep holes, oblique shallow holes, and downslope hole-by-hole sublevel or simultaneous detonation techniques. In each bench, the detonations of holes in a detonation unit occur at intervals of 25-50 milliseconds. The research findings can offer technical guidance on how to blast heterogeneous rocks in hillside limestone quarries.
引用
收藏
页数:5
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