Research on Water Permeability Test of Old Goaf in Changping Mine
In order to evaluate the degree and scope of groundwater pollution caused by coal mine old goaf water,understand the hydrogeological conditions of groundwater in old goaf,summarize the hydrological changes law in aquifers affected by mining influence,and provide experience for the protection and utilization of groundwater resources in the future,taking the shallow mining old goaf of Changping Mine as an example,the"stable flow phreatic water complete well method"is proposed to carry out pumping and pressurized-water engineering tests.The experimental results show that the water permeability coefficient of the strata in the goaf and the upper three-zone area affected by mining and excavation activities is 10-1000 times higher than that of the bedrock in the unaffected area.The evaluation of the pollution range of groundwater in the goaf can be quantitatively evaluated according to the magnitude law of the water permeability coefficient of the rock strata.The water permeability level of faults plays an important role in changing the groundwater flow field near the goaf.
old goaf waterhydrogeological conditionwater permeability testgroundwater flow field
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