shaft excavation

How to control harmful vibration in the course of shaft stonework blasting among high-rise buildings remains the key point in stonework blasting excavation.

在高大楼群中进行竖井石方爆破，如何控制震动危害，是石方爆破开挖的关键。

Physical Model Test and Study on Shaft Excavation by One-step Deep-hole Blasting

一次爆破成井物理模型试验研究

The sequence of excavation for the shaft of diversion system at Pushihe storage power station is to excavate the pioneer well used by back well boring machine, then by hand air drill to expand it.

蒲石河抽水蓄能电站引水系统中的竖井开挖，拟采用反井钻机进行导井开挖，人工手风钻钻孔扩挖的方式施工。

Shaft to ventilation and excavation, repair qanat soil when used.

竖井是为了通风和挖掘 、 修理坎儿井时提土之用的.

Investigation on Application of Blasting Crater Test in Shaft Excavation by One Blasting

爆破漏斗试验在一次爆破成井中的应用研究