副井是相对主井而言的，在地下采矿作业的巷道布置过程中，一般情况下，设置有主井和副井两种井筒。
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。
The thesis presents the application of surface pre-grouting to construction of auxiliary shaft in Yangliu coalmine.
鲍店煤矿主副井筒变形破裂，严重威胁矿井安全，经济损失巨大。
The main and auxiliary shafts in Baodian Coal mine are deformed and ruptured, threatening seriously on the mine safety and causing heavy economic losses.
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。
The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.
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