Modelling Rock Blasting Considering Explosion Gas Penetration Using Discontinuous Deformation Analysis

被引：104
|
作者：
Ning, Youjun [1 ,2 ]
Yang, Jun [2 ]
Ma, Guowei [1 ,3 ]
Chen, Pengwan [2 ]
机构：
[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
[2] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
[3] Univ Western Australia, Sch Civil & Resource Engn, Crawley, WA 6009, Australia
来源：
ROCK MECHANICS AND ROCK ENGINEERING | 2011年 / 44卷 / 04期
关键词：
Bench rock blasting; Rock mass fracturing; Explosion gas pressure; Numerical modelling; Discontinuous deformation analysis; FRACTURE;
D O I：
10.1007/s00603-010-0132-3
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Explosion gas plays an important role in rock mass fragmentation and cast in rock blasting. In this technical note, the discontinuous deformation analysis method is extended for bench rock blasting by coupling the rock mass failure process and the penetration effect of the explosion gas based on a generalized artificial joint concept to model rock mass fracturing. By tracking the blast chamber evolution dynamically, instant explosion gas pressure is derived from the blast chamber volume using a simple polytropic gas pressure equation of state and loaded on the blast chamber wall. A bench blasting example is carried out. The blast chamber volume and pressure time histories are obtained. The rock failure and movement process in bench rock blasting is reproduced and analysed.
引用
收藏
页码：483 / 490
页数：8
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