A Research on Hydrogeological Characteristics and Water Inflow Prediction of A Manganese Mine in Inner Mongolia
Our study area belongs to the transitional region of accretion and collision of the continental margin of the Siberian Plate and the North China Plate.The exposed strata in the mining area are mainly the Gegenaobao Formation of the Carboniferous and Permian periods.The Gegenaobao Formation is a set of sedimentary clastic rocks containing discontinuous fissure water.The Quaternary is a Holocene alluvial yellow-brown subsoil,which is mostly a weak aquifer or an impermeable layer.There is no surface water body in the mining area,and the groundwater is Quaternary loose rock pore water and bedrock fracture water.The main source of recharge is atmospheric precipitation.The direction of groundwater flow is generally from west to east.The distribution,thickness,and water richness of aquifers in the mining area are controlled by joint fissures and fault structures and vary greatly.In this paper,the estimation of mine water inflow is obtained by the"Big Well Method".The calculation parameters are obtained by pumping tests.The Big Well Method calculated the maximum water inflow of the mine as 322.53 m3/d,which can be used as the basis for mining design.
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