【摘要】 地应力是采矿工程和岩土工程设计与动力灾害防治的重要依据.地应力场反演是基于现场个别离散点应力测量结果,采用数力方法对目标区域的地应力分布的推算和拓展.本文系统介绍了区域地应力场反演和构建方法,重点阐述了他们的学术思想、应用领域以及优缺点,总结凝练了国内外学者在地应力反演算法和工程运用中作出的改进和创新,特别是非线性数理方法在地应力场反演应用中的新进展.本文提出了一种新的地应力场计算的非线性优化新算法——替代模型加速优化算法,该方法能够保证高精度、快速获得全局最优解.为了适用大规模地应力场反演,发展了能产生降阶和特征提取作用的特征正交分解地应力反演优化算法.最后,提出面向深部岩石工程和地质灾害防治的地应力场研究发展方向.更多还原

【Abstract】 In situ stress is an important basis for the design of mining and geotechnical engineering and dynamic disaster prevention.The inverse calculation of in situ stress field is carried out on the basis of in-situ stress measurement results on a few individual points,combining with a mathematical and mechanical method to regresses and extend them in situ stress field distribution.Focused on the academic idea,scope of application,and the advantages and disadvantages,the basic inverse algorithm and reconstruction methods for in situ stress field are introduced in a systematic manner.The improvement and innovation made all around of the word in literature and application are summarized and elaborated,particularly,the new achievements of the nonlinear mathematical methods used in the inverse calculation of the in situ stress field.In the presented work,a new nonlinear optimal algorithm-surrogate accelerated model is put forward for the calculation of in situ stress,which ensures to obtain the best optimal solution for the entire analytic region.In order to perform large scale in situ stress field calculation,aproper orthogonal decomposition algorithm is developed,which plays a role in order reduction andcharacter extraction.Finally,the trend of research and development in study of in situ stress field is put forward for deep rock engineering and prevention of geological disaster.更多还原