基于数值模拟的富水煤系地层滑坡水文地质参数反演
周洁 , 穆康帝 , 张玉芳 , 班超 , 刘成君 , 杨忠民 , 周华德 , 何佳俊
地球科学 ›› 2026, Vol. 51 ›› Issue (4) : 1463 -1475.
基于数值模拟的富水煤系地层滑坡水文地质参数反演
Inversion of Hydrogeological Parameters of Landslides in Water-Rich Coal-Bearing Strata Based on Numerical Simulation
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由于连续降雨导致广东省某地区高速交汇处发生滑坡险情,滑坡导致高速局部边坡挡墙顶面泥浆水漫流,边坡挡墙存在开裂、倾斜等病害.该滑坡区地层为典型的富水煤系地层,不均匀性高,遇水易软化.地下水及水文地质参数是滑坡防治的重要因素,为探究该滑坡区水文地质参数,在滑坡治理期间,进行了水文地质试验.将通过不同井的试验数据对其进行建模,再运用数值反演法,采用Visual MODFLOW 3D对水文地质试验过程进行数值模拟,通过反演水文地质参数,使各个不同位置的观测井水位实时变化规律的模拟结果和实测结果相一致,从而优选确定该参数为最接近场地实际的水文地质参数,便于更准确地预测和分析滑坡的发生、发展和影响范围.
Taking a landslide area in Guangdong Province as the research object, Visual MODFLOW is used to process the elevation data of landslide area and establish an accurate 3D model combined with the geological exploration report of landslide area. After the three-dimensional landslide model is established, the corresponding model parameters are calculated and input through the field hydrogeological test data. Then, the numerical inversion method is used to simulate the hydrogeological test process. By inversion of hydrogeological parameters, the numerical simulation results of observed well water level at different positions are consistent with the actual measurement results. Thus, the hydrogeological parameters closest to the actual site are determined. In this paper, the hydrogeological parameters of the landslide area are obtained from both numerical simulation and theoretical calculation, and the results obtained by the two methods are not very different. Therefore, the numerical simulation method adopted in this paper can more conveniently obtain the hydrogeological parameters of the landslide area. The obtained data can be used to accurately evaluate the influence of groundwater on landslide, and provide scientific basis for landslide prevention and control and improvement of regional hydrogeological conditions.
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中国教育部2022年“长江学者青年项目”(Q2022101)
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