At present, drilling and blasting method is mainly used in the shaftexcavation.
目前,天井的掘进方法,主要采用钻爆法。
2
The spoiling is a key factor influencing the advance speed for the shaftexcavation, especially for the excavation of large cross section and deep shaft.
对于竖井开挖 ,尤其是大断面 深竖井开挖 ,出碴这一环节 ,往往是决定掘进速度快慢的关键因素。
3
The application results in the real shaftexcavation projects indicate that the risk of cost estimation can be effectively controlled by taking a variety of measures.