采矿扰动下含水层参数多尺度变化特征及尺度效应研究

矿井采掘活动会改变地质介质的结构和性质，相应地导致地下水循环条件和地下水资源属性的变化。含水层参数是表征这一变化过程的重要指标。本项目拟在充分收集资料和对研究区地下水流系统识别的基础上，通过为期3-4年的较高观测井密度、高采样频率（次/小时）的水位观测，获取地下水位长观数据，利用水位固体潮效应计算含水层参数，探究矿区、井田、"三带"多尺度含水层参数空间变化特征；通过连续的固体潮信息处理和提取，揭示采动条件下，不同尺度、不同含水层参数动态变化规律；通过注水试验和基于固体潮效应计算的同一时段含水层参数的对比分析，评价参数的尺度效应。项目的研究对于深入理解采矿导致的介质"后生"非均质性、对于变化条件下科学地进行水资源评价、对于矿井突水预测具有重要的科学意义和实际意义。

Mining could alter the structure and property of geological meterials,which in turn would lead to the changes of groundwater circulation and resource attribution. Aquifer parameters are very important indices to characterize the processes. The proposed project is aimed at exploring the spatial and temporal changes of aquifer parameters induced by mining in multi-scales. Isotope and hydrogeochemistry approaches will be employed to identify the groundwater system. A long-term well water level observation is planned to perform in multi-wells with high recording frequency. The aquifer parameters will be calculated by using the tidal response methods and well water level data obtained from long-term observations. The temporal change of aquifer parameters will be evaluated by repeatedly computing aquifer parameters using well water level data in different time durations. Slug test will be conducted to obtain the aquifer parameters and their results will be compared with those computed by the tidal response methods. The spatial and temporal changes of aquifer parameters will be assessed by integrating the results. The study would be helpful to the understanding of the overlapped inhomogeneity of geological meterials under mining, and to the groundwater resources assessment and water inrush prevention.