岩体爆破松裂区的损伤机制及其数值模拟  

DAMAGE MECHANISM AND NUMERICAL SINULATION OF THE MICROCRACK ZONE RESULTING FROM ROCK BLASTING

作　　者：张断春 刘洁吾 

机构地区：[1]四川联合大学水利系

出　　处：《爆炸与冲击》1996年第3期250-258,共9页Explosion and Shock Waves

基　　金：中国博士后基金

摘　　要：用损伤力学处理方法着重研究爆破运区岩体的松裂机制，建立其损伤发展方程与本构模型。在二维限差分计算程序（Ｓｈａｌｅ）中嵌入伤模型后，实现了岩体爆破松裂区数值模拟。对三峡工程左岸坝基岩体小药量爆破试验和清江隔河岩工程的开挖爆破进行了模拟计算，其结果与相应的实测数据吻合，模拟相对误差小于１３．３％Umder the action of blasting load,a lot of cracks which are short in lengthand do not cut throngh each other are created within the distant region away from the explosion center.thus,a zone in which many microcracks are distuributed is formed.The mechanism of creating microcracks in the distant region under rock blasting is em-phatically analysed according to the damage theory in this paper. Through the method inconsideration of the natural cracks as the primary damage and weak planes which are the potential damage developing sources,the author defines the damage variable of rockmass as follows:

关 键 词：岩体爆破松裂区 损伤 数值模拟 

分 类 号：TD313[矿业工程—矿井建设]