Analysis of water abundance characteristics of sandstone aquifer in Luohe Formation on the basis of ArcGIS

Aquifer water abundance evaluation is the prerequisite for coalmine water inflow prediction and water disaster prevention. Luohe aquifer is the roof of No.4 coal seam on panel 41 in Wenjiapo mine. Six main controlling factors of Luohe aquifer chosen to assess coal water abundance are aquifer thickness, porosity, moisture content, washing liquid consumption and apparent resistivity of upper and lower Luohe Formation. Analytic hierarchy process(AHP) has been used to determine the weight of each control factor. Based on ArcGIS numerical visualization platform, the vector maps of factors are normalized and superimposed, and then water abundance evaluation model of aquifer based on multifactor has been built and applied in panel 41. Comparing the prediction results to unit discharge of water in the borehole and discharge data, it shows that the prediction results by model application match the field data. The model could provide a powerful basis to water abundance assessment of Luohe Formation aquifer in Binchang coalfield.