【摘要】 分析预裂爆破过程中，对于炮孔堵塞物的轴向一维运动；炮孔空腔的动力膨胀运动；炮孔周边裂纹的动态扩展与爆生气体的渗入；以及炮孔堵塞物可能从孔口冲出后出现的敞孔孔口喷流等诸因素，结合炮孔内爆生气体的状态方程，从理论上来确定预裂爆破过程中炮孔压力随时间的变化历程，并提出理论计算得到的炮孔压力在工程应用中的修正方法。计算与修正全过程编成程序由电算完成。分析与计算表明，从理论上确定炮孔压力变化历程的方法是可行的。更多还原

【Abstract】 In this paper a theoritical method to calculate the pressure variation in the boreholefor pre-splitting explosion. In accordance with the equation of state of gases,the one-dimensionmovement of the stem, is presented dynamic fracture propagation between boreholes,the development of fracture volume and the outburst of explosive-produced gases after the burst of stem , etcare also given. The calculated result is modified both in amplitude and pressure durative time inborehole according to the result of sonic measurement.更多还原