The reasonable blasting parameters are selected according to symmetrical compression blasting, the fragmentation and gradation of dam materials are well controlled by using porous prill ANFO.

• 通过相向对称微差挤压爆破,合理选取爆破参数以及采用多孔粒状铵油炸药,使坝料块度和级配得到了良好控制,提高了坝体工程质量,加快了施工进度,可供同类工程借鉴。