Abstract: In this paper, according to the analysis of the data of 60 effective pumping test boreholes collected from the Quaternary unconsolidated confined aquifer of Huaibei Coalfield, which is a typical North China type coalfield, the multi-factor complex model of water abundance assessment on unconsolidated confined aquifer was established. In the model, six factors were selected as the assessing indexes, which included water resistance coefficient (R), head coefficient (G), aquifer thickness (S), thickness of the thickest sand layer (M), gradation coefficient (D) and interbedded sand and mud coefficient (P). The weight values of six factors were assigned based on the coupling of improved Analytic Hierarchy Process (AHP) and CRiteria Importance Through Intercriteria Correlation (CRITIC) to avoid the subjective or objective characteristic when weights were separately determined by AHP or CRITIC. The coupling weighting model was verified by eleven pumping test boreholes data, and the accuracy of the assessment results of the model was as high as 90.91%. Moreover, these selected factors could be obtained from the data of ordinary geological exploration boreholes, so there was no need to carry out too many field pumping tests and geophysical explorations. The model was applied to a specific engineering case affected by mining to assess the temporal and spatial dynamic change of water abundance of unconsolidated confined aquifer, and the results were relatively accurate.
Keywords: Analytic Hierarchy Process(AHP); CRiteria Importance Through Intercriteria Correlation (CRITIC); unconsolidated confined aquifer; water abundance; assessment model
合肥工业大学学报自科版