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.