Li Liyao, Xia Fei, Liu Jinhui, Zang Kai, Liu Chao, Wei Jiuchuan, Liu Longlong
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330000, China.
Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology, Nanchang 330000, China.
ACS Omega. 2022 May 17;7(21):18004-18016. doi: 10.1021/acsomega.2c01387. eCollection 2022 May 31.
The Ordos Basin is a sedimentary basin located in Inner Mongolia, China, where coal and uranium coexist. Water inrush disasters have always been one of the main disasters that threaten the safety of coal mine production, and thus, the study and division of groundwater potential regions are of great significance for the prevention of water inrush disasters and in situ leaching of sandstone-type uranium ore. A new method combining truncated Gaussian simulation and sedimentary facies control was established to predict the groundwater potential area. Taking a typical aquifer, the Zhiluo Formation, as an example, based on high-resolution sequence stratigraphy, geophysics, sedimentary geology, and geostatistical theory, the plane distribution of sand bodies was predicted. Furthermore, the relationship between rock porosity and electricity porosity was established to calculate the regional porosity. Combined with truncated Gaussian simulation and facies-controlled modeling methods, a facies-controlled heterogeneous property model was established to analyze the heterogeneous effective porosity of the aquifer in the study area. Groundwater potential areas were quantitatively evaluated by 3D modeling analysis. The results of the evaluated model were verified by actual data and provide a geological guarantee for the accurate mining of deep coal and uranium ore. A 3D distributed model of chemical elements, which is meaningful for in situ leaching uranium mining, is expected in future research.
鄂尔多斯盆地是位于中国内蒙古的一个沉积盆地，这里煤炭和铀共存。突水灾害一直是威胁煤矿安全生产的主要灾害之一，因此，对地下水位势区进行研究和划分对于预防突水灾害和砂岩型铀矿的原地浸出具有重要意义。建立了一种结合截断高斯模拟和沉积相控制的新方法来预测地下水位势区。以典型含水层直罗组为例，基于高分辨率层序地层学、地球物理学、沉积地质学和地质统计学理论，预测了砂体的平面分布。此外，建立了岩石孔隙度与电孔隙度之间的关系来计算区域孔隙度。结合截断高斯模拟和相控建模方法，建立了相控非均质性模型，分析了研究区含水层的非均质有效孔隙度。通过三维建模分析对地下水位势区进行了定量评价。评价模型的结果通过实际数据进行了验证，为深部煤炭和铀矿的精确开采提供了地质保障。未来研究有望建立一个对原地浸出铀矿有意义的化学元素三维分布模型。
