Impact of Coal Mining on the Moisture Movement in a Vadose Zone in Open-Pit Mine Areas

Long-term dewatering of groundwater is a necessary operation for mining safety in open-pit coal mines, as extensive might cause ecological problems due to dramatic changes moisture movement the soil, especially ecologically fragile areas. In order evaluate impact on vadose zone and vegetation, this paper presents quantitative methodology takes Baorixile mine study example. A long-term situ experiment (from 2004 2018), laboratory analysis, numerical modelling were conducted analyze mechanisms relationship among dropping level, vadose-zone moisture, responses grassland area. The data results suggest that level during has limited influence zone, exhibiting variation capillary water within depth 3 m while soil at least 16 deep. critical evaporation ground 8 m. radius about 2.72 km operation, change mainly influences lower part intermediate below m, with little contents where roots shallow vegetation grow. from provide useful insight sustainable development