钻孔参数炮孔名称雷管段别MS1MS3MS5MS7主爆孔MS9MS10MS11MS12底孔周边孔合计MS13MS14孔径(mm)50505050505050505050孔深(cm)1111111111孔距(cm)1111111111最小抵抗线(cm)11111111111K值装药参数孔数111111111110药径(mm)35353535353535353525装药长度(cm)1111111111堵塞长单孔药量度(cm)(kg)00000000000.010.010.010.010.010.010.010.010.0100.25线装药密度(kg/m)段药量(kg)0.010.010.010.010.010.010.010.010.0100.09掏槽孔说明: 装药长度=(孔深L)×(充填系数a),a的取值见下表:
炮孔充填系数a岩体坚固系数f4～60.55～0.67～90.6～0.6510～140.65～0.715～200.7～0.75注：f=R/10,R—岩石极限抗压强度
a辅助孔(位于掏槽孔与周边孔及底板孔之间)炮孔间距岩体软岩中硬岩炮孔间距(cm)100～12080～100岩体硬岩特硬岩炮孔间距(cm)60～8050～70