Effects of in-situ stresses on the fracturing of rock by blasting

被引：168
作者：
Yi, Changping [1 ,2 ]
Johansson, Daniel [1 ,2 ]
Greberg, Jenny [1 ]
机构：
[1] Lulea Univ Technol, Div Min & Geotech Engn, Lulea, Sweden
[2] Lulea Univ Technol, Swedish Blasting Res Ctr, Lulea, Sweden
来源：
COMPUTERS AND GEOTECHNICS | 2018年 / 104卷
关键词：
Blasting; In-situ stresses; Crack propagation; DYNAMIC-RESPONSE; FAILURE; FRAGMENTATION; MECHANISMS;
D O I：
10.1016/j.compgeo.2017.12.004
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Blasting is widely applied in deep rock excavation. The effect of in-situ stresses on the fracturing of rock due to blasting was investigated. A theoretical model was used to explain the effect mechanism of in-situ stresses on crack propagation due to blasting. Four cases with different in-situ stress conditions were numerically investigated. The numerical results indicate that the crack propagation is governed by the blast load in the vicinity of the blasthole while the high in-situ stresses can influence the crack propagation in the far-field. The crack propagation trends towards the direction in which the high initial pressure is applied.
引用
收藏
页码：321 / 330
页数：10
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