工程科学学报2016，Vol.38Issue(1)：19-25,7.DOI:10.13374/j.issn2095-9389.2016.01.003
不同地应力条件下含节理岩体爆破的数值模拟
Numerical simulation of jointed rock mass blasting under different in-situ stress conditions
摘要
Abstract
Two-hole blasting of jointed rock mass under different in-situ stress conditions (lateral pressure coefficient:0.5,1 and 2;vertical stress:5 MPa and 10 MPa) and joint angles (30°,45°,60° and 90°) was numerically simulated to study the process of crack initiation,propagation and coalescence.In the simulation,rock damage was induced by stress waves and explosion gas pressure.Simulation results indicate that for rock without a joint,the initial stress field has a guide role on crack propagation,and the crack propagation direction coincides with the maximum compressive principal stress.However,the existing joint has effect on the crack propagation direction.When the joint angle is 30°,the blasting induced crack connects with the joint and forms a "z" shape.The existing joint would play a positive role in promoting crack initiation and propagation and favor crack propagation along the vertical direction.关键词
含节理岩体/爆破/地应力/裂纹/数值模拟Key words
jointed rock mass/blasting/in-situ stresses/cracks/numerical simulation分类
矿业与冶金引用本文复制引用
魏晨慧,朱万成,白羽,龙坤..不同地应力条件下含节理岩体爆破的数值模拟[J].工程科学学报,2016,38(1):19-25,7.基金项目
国家自然科学基金资助项目(51304037,51374049,51525402) （51304037,51374049,51525402）
中国博士后科学基金资助项目(2013M541238) （2013M541238）
中央高校基本科研业务费资助项目(N140104007,N140105001) （N140104007,N140105001）
