【摘要】 本文在动光弹模型研究和砂浆模型试验的基础上分别从几个不同的角度对光面爆破机理进行了讨论。文章主要研究了炮孔周围的应力场、相邻炮孔之间爆炸应力场叠加的动态特征,爆生气体的增压作用对应力场及破碎的影响,导向孔对径向裂缝扩展方向的控制,以及时差起爆对相邻炮孔之间裂缝贯穿的影响等问题。更多还原

【Abstract】 With the data obtained from the dynamic photoelasticity and cement-mortar model tests,the authors made a further study of the mechanism of smooth blasting and viewed it from different aspects.The considerations expounded in this paper are as follows;( 1 ) the stress fields around a borehole caused by explosion;( 2 ) the dynamic characteristics of accumulative stress fields between two adjacent boreholes;( 3 ) the effects produced by explosive gases on the stress fields and fragmentation;( 4 ) the mechanism of guide holes ( uncharged ) in controlling the direction of radial cracks and( 5 ) comparison of the effects on crack penetration produced by adjacent boreholes initiated simultaneously and by those with a time difference.更多还原