煤矿安全2012，Vol.43Issue(2)：167-171,5.
起爆位置对煤岩体深孔爆破的影响
The Influence Research of Initiating Position on Deep-hole Blasting Among Coal-rock Masses
摘要
Abstract
Based on rock fracture mechanics and explosion mechanics principle,the paper analyzes the influence of initiating position on deep-hole blasting.And with the help of finite element software ANSYS/ LS-DYNA,using three-dimensional numerical simulation,the paper studies cylindrical charge stress field and propagation rule among the coal and rock produced by different initiating position.The results show that initiation position has significant effect on deep-hole blasting when high-energy area of orifice initiating points to coal-rock mass inside.It is useful to instantaneous brittle fracture of blast hole deep rocks.Compared with orifice primes,hole-bottom primes that produces effective-stress impulse in coal-rock masses is about 1.5 times,which is conducive to crushing and crack propagation in the plastic stress concentration zone of coal-rock masses.The results have important theoretical and practical value,which further reveal the mechanism of deep hole blasting,improve the effectiveness of prevention and control of coal and rock dynamical disasters and increase permeability of the low permeability coal seam with blasting.关键词
起爆位置/深孔爆破/有效冲量/数值模拟/裂纹扩展Key words
initiating position/deep-hole blasting/effective impulse/numerical simulation/crack propagation分类
矿业与冶金引用本文复制引用
胡少斌,王恩元,陈鹏,刘杰,季淮君..起爆位置对煤岩体深孔爆破的影响[J].煤矿安全,2012,43(2):167-171,5.基金项目
国际科技合作资助项目 （）
