Research on water conductivity and influencing factors of collapse columns in Gaohe Coal Mine

Li Feng; Wei Junxian; Xu Jinpeng; Zheng Yinan; Peng Dongdong; Li Pu

doi:10.19896/j.cnki.mtkj.2025.05.018

Abstract：Collapse column is an important water channels in coal mine water disasters,and collapse column water accidents have caused many major water disasters.88 collapse columns have been found in Gaohe Coal Mine,some of which have been found to have water conductivity.In order to study the hydraulic conductivity of collapse columns in Gaohe Coal Mine,data on the exposed collapsed columns in Gaohe Coal Mine were collected and organized.The collapsed columns in the mine were divided into three types:non hy-draulic,coal based hydraulic,and Ordovician hydraulic.Influencing factors of hydraulic conductivity of collapse columns were summa-rized and analyzed,and a hierarchical relationship diagram of influencing factors of hydraulic conductivity of collapse columns was es-tablished.On this basis,a comparative analysis was conducted one by one on the factors affecting the hydraulic conductivity of collapse columns in Gaohe Coal Mine,including lithological factors,runoff conditions,compaction conditions,and their sub factors.Research has found that lithology has a significant impact on the hydraulic conductivity of different layers in a collapse column,the shape of folds af-fects groundwater runoff,and water conducting collapse columns are mostly developed in the runoff zone;the smaller the size of collapse columns,the lower the development height,and the smaller its compaction effect.Water conducting collapse columns are mostly con-cealed collapse columns.The research results can provide scientific basis and theoretical support for preventing water damage caused by collapse columns in the mine.