shaft boring

基本解释

The concept of depth limit for the method applied to sinking of shaft lining by means of floatation in shaft boring that was widely utilized in mine construction was put forward.
提出了国内广泛采用的悬浮下沉井壁钻井施工法有其深度极限的观点。
The concept of depth limit for the method applied to sinking of shaft lining by means of floatation in shaft boring that is widely utilized in mine construction in China was put forward.
提出了国内广泛采用的悬浮下沉井壁钻井施工法有其深度极限的观点。分析了泥浆中的井壁筒在加入配重水（非满水）后井壁底接触岩石时的受力状态；
The concept of depth limit for the method applied to sinking of shaft lining by means of floatation in shaft boring that is widely utilized in mine construction in China was put forward.
提出了国内广泛采用的悬浮下沉井壁钻井施工法有其深度极限的观点。