Due to water inrush accidents caused by underground tunnel air shaft, the main shaft of Banji coal mine and its shaft auxiliary were submerged, with mud and sand and water filled in. In the process of governance, it has taken the wellbore to throw fill stones, around the wellbore formation, exploration, and frozen ground grouting treatment scheme of measures. The frozen wall to a certain extent will begin drainage on wellbore. Because currently both at home and abroad, there are no similar cases from which the experience can be learnt, and may be in the drainage and dredging processes subsequent exist because early governance is not in place with the factors threatening the wall as well as the safety of construction workers. Therefore, it is important to make a scientific and reasonable plan. Through the scientific analysis of geological, hydrological phenomena in the process of pre-treatment, reasonable drainage test mode and obtaining hydrogeological parameters are determined, which can provide guidance for the drainage of the follow-up job.