boulder blasting meaning in English

爆破大石
爆破巨砾
二次爆破
分块钻孔
巨石开炸
巨石炸

During the deep - hole blasting for the excavation of guishan quarry for construction of baoquan pumped storage hydropower station , the blasting powder factor and the charging concentration of the blasting powder in the rock are reasonably controlled , and then the rate of blasting chunk is greatly decreased with the reduction of the working amount of the boulder blasting afterwards in conjunction with the suitable excavator and crusher etc
摘要在宝泉抽水蓄能电站工程龟山料场开挖的深孔爆破中，合理控制了爆破单位耗药量和炸药在岩石中的集中度，最大限度地降低了大块率，并结合使用适宜的开挖及破碎机械等措施，从而减少了二次爆破工作量。