基于ELM的河谷区域初始地应力场反演分析

Inverse Analysis of Initial Geostress Field in Valley Based on ELM

分析河谷区域地应力场的特殊性,提出基于ELM的河谷区域地应力场反演方法。以某水电站地下厂房项目为工程实例,分析实测地质资料和实测地应力资料,建立大范围区域三维地质体模型。利用ELM和FLAC3D相结合,考虑自重、构造运动和侵蚀下切作用的影响,通过反演计算获取该区域的初始地应力场。对计算结果合理性进行分析,证明了反演方法的工程应用价值。

The particularity of the geostress field in the valley is analyzed,and the inland stress field inversion method based on the ELM is proposed.Taking an underground powerhouse project of a hydropower station as an example,the measured geologic data and measured geostress data are analyzed to establish a large-area three-dimensional geological model.By using the combination of ELM and FLAC3D,the influence of self-weight,tectonic movement and erosion undercutting is considered,and the initial geostress field of the area is obtained by inversion calculation.The rationality of the calculation results is analyzed,which proves the engineering application value of the inversion method.