Evaluation of the impact of coal mining on shallow groundwater
Li Xuejun1, Zhang Tianwen1, Meng Jie2
1.Institute of Mineral Geological Survey of Ningxia Hui Autonomous Region (Autonomous Region Institute of Mineral Geology), Yinchuan 750021，China; 2.Ningxia Dekun Geotechnical Engineering Co., Ltd., Yinchuan 750021，China
Abstract： Due to the influence of coal mining, there was a large range of subsidence area in the goaf of Great Wall No.3 Coal Mine. The subsidence area was located in the Ningxia Hui Autonomous Region, Yinchuan City, Xingqing District, Yueyahu Township, the eastern part of the herdsmen 's new village area, belong to upstream area of the region 's diving groundwater runoff. In recent years, the coal mining subsidence area and most of the downstream areas experienced the depletion of water resources, the continuous reduction of groundwater level and the continuous deterioration of water quality. In view of this situation, the groundwater environment survey, hydrogeological drilling, groundwater level measurement, water sample sampling and detection were carried out in the goaf area of the Great Wall No.3 Mine. The height of the " two zones " of the mining coal seam was theoretically analyzed and calculated. The mine water filling factors, shallow groundwater flow field characteristics, groundwater long-term observation data, hydrological dynamic observation and other data were comprehensively and systematically analyzed and studied. Combined with the actual exposure data of the coal mine, the influence of mining and surface subsidence on shallow groundwater in Great Wall No.3 coal mine was analyzed and evaluated, and relevant suggestions were put forward to provide guidance and basis for strengthening the protection of local groundwater resources, developing and utilizing groundwater resources scientifically and reasonably, and realizing the sustainable development and utilization of groundwater resources.
