The auxiliaryshaft topsoil adopted ordinary construction and drainages in hygrometric well.
屯留煤矿副井井筒表土段采用普通法施工，利用井外降水井疏干降水。
2
The thesis presents the application of surface pre-grouting to construction of auxiliaryshaft in Yangliu coalmine.
本文介绍了地面预注浆施工技术在杨柳煤矿副井中的应用。
3
Variety rules of concrete strain of outer shaft wall were carried out based on in-situ measurement during freeze sinking of Longgu Mine auxiliaryshaft.