Exploration of hydrogeological conditions of Baotashan sandstone aquifer based on dewatering test
WEI Qiming
ZHAO Baofeng
ZHANG Zeyuan
Abstract：In order to further explore the hydrogeological conditions of Baotashan sandstone aquifer in Ningdong coalfield and provide basic data for the water disaster prevention and control of the lower coal floor sandstone,the hydrogeological parameters of the aquifer were calculated by dewatering test,and the feasibility of water drainage from aquifer was proved.The results show that:according to the data of dewatering borehole and one observation borehole,two observation boreholes from single borehole dewater-ing test of Baotashan sandstone,the average permeability coefficient calculated by analytical method is 0.301 m/d and 0.219 m/d,and the average influence radius is 691 m and 914 m,respectively.The average influence radius obtained by graphic method is 697 m,and the unit water inflow is 0.071-0.088 L/(s·m)according to three times of deep drawdown.The hydrogeological parameters ob-tained by dewater test are large than those obtained by pumping water test.The hydrogeological characteristics of Baotashan sand-stone aquifer are weak permeability and water abundance,the water abundance is uneven,and the pressure and water temperature are high.Based on the results of dewater test and the analysis of boundary conditions in the study area,it is found that Baotashan sand-stone aquifer has good drainage ability.
Keywords：water disaster prevention and controlNingdong coalfieldBaotashan sandstone aquiferdewatering testhydrogeolo-gical parameterhydraulic connectiondrainage feasibility
Publication Date：2024-09-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 173-179 )