The method is reasonable, and the classifications have a certain benefits to improve blastingefficiency.
该方法分类合理，对提高爆破效率具有一定的指导意义。
2
Meanwhile, which can improve the blasting effect, made the rock fragment more uniformly, and improve the blastingefficiency.
改善爆破质量，使破碎块度更加均匀，从而提高爆破效率。
3
Through adopting the parallel cut and inverse initiation, and selecting correct delay-interval, an average blastingefficiency of 90% had been achieved.