混凝土爆破孔壁动态初始参量的数值模拟

NUMERICAL SIMULATION ON INITIAL SHOCK PARAMETERS OF BOREHOLE WALL FOR CONCRETE BLASTING

在考虑爆轰波与孔壁相互作用及孔壁的可压缩性等主要因素情况下，根据爆轰理论和流体动力学原理，建立了计算偶合装药点起爆时孔壁动态初始参量的物理模型，给出了计算公式。计算了中等威力炸药（如２＃岩石炸药、乳化炸药和水胶炸药）在混凝土中爆炸时孔壁动态初始参量（如初始冲击波压力、速度等值），得到了自起爆点开始沿炮孔长度方向各参量的变化规律、并得出了一些有意义的结论。

According to detonation theory and hydrodynamics,a physical model for calculating initial shock parameters of borehole wall in coupling charge which is practical and suitable for dot initiation has been advanced in this paper regarding some factors such as interaction between detonation wave and borehole wall,deformation of borehole wall.The calculation formulas have been put forward The initial shock parameter such as pressure,velocity etc.of borehole wall have been calculated when No.2 rock explosive,emulsion and water gel are exploded in concrete respectively.The variation regularity of each parameter has been obtained from the ignited dot to the end of coupling charge borehole along the axial direction of borehole.