Mine flooding accidents were easily triggered by collapse column especially concealed conducting water of collapse column, including its unclear exploration, management didn’t reach the designated position and blind reveal. In order to avoid water inrush accidents caused by mistakes in mining process, we needed to make sure ahead of working face advancing that whether concealed collapse column existed in scope of working face. Taking Jiulong Mine as example, occurrence state and form of concealed collapse column in coal floor were detected by ground area advanced management technology, together with grouting strengthening management, which eliminated water inrush danger in coal floor and achieved safety mining in deep coal seam.