Prediction of water inflow and waterproof and drainage scheme in Ha'erwusu Open-pit Coal Mine
In order to determine the waterproofing and drainage plan of Ha'erwusu Open-pit Coal Mine,numerical simulation method and large well method were respectively used to predict the groundwater inflow in Ha'erwusu Open-pit Coal Mine and compared the prediction results of both.A drainage plan was proposed in combination with the impact of rainfall.The results show that the simulated water levels of borehole S1 and borehole S2 are generally consistent with the measured water levels.By numerical simulation,the water inflow rate of the mine is determined to be 95.67 m3/d,while using the large well method results in a water inflow rate of 91.02 m3/d.Based on the principle of"higher rather than lower,"the normal water inflow rate of the mine is determined to be 95.67m3/d,with the maximum water inflow rate in the mining area reaching 143.51 m3/d.During normal rainfall,the drainage depends on evaporation,production water and sprinkler operation.And during rainstorm drainage,the drainage equipment and pipelines in the water pit of the coal mining area are used to drain the catchment water into Nanping Ditch.
aquiferlarge well methodnumerical simulationwater inflowwaterproof and drainage
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