摘要
为克服现场地应力测量存在费用高、周期长、数据离散等诸多问题,充分利用有限工程实测地应力数据,提出了复杂地应力场几何跨尺度计算方法,建立了基于多元线性回归的地应力场反演数学模型,重构了大尺度单元到细化小尺度单元的数值计算模型,发展了区域应力场到局部应力场的跨尺度应力场重构技术与方法,实现了基于工程有限测点实测应力的复杂地应力场自动回归反演与重构.工程实例验证表明,该方法计算的地应力与实测地应力完全吻合,所提出的几何跨尺度地应力场反演与重构方法合理可行,计算结果可靠.
In order to overcome the problems in geo-stress measurement due to high cost, long cycle, and data discrete, the cross-scale calculation method of a complicated geo-stress field is put forward by making full use of limited measured geo-stress data. A mathematical model of multivariate linear regression is proposed for back-analysis of the geo-stress field. This method can realize the reconstruction of a numerical model from large-scale elements to small-scale elements. The geometric cross-scale model-building technology and method are developed from global to local geo-stress field. As a result, an auto-regression, back analysis and reconstruction of the geo-stress field are performed based on the limited measurement data in site. The research shows that the calculated stress values agree well with the observed values, indicating that the proposed method of auto-regression, back-analysis, and reconstruction of complicated geo-stress field is reasonable and feasible, and the calculated results are reliable.
出处
《采矿与安全工程学报》
EI
北大核心
2011年第4期589-595,共7页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2010CB731501)
国家自然科学基金项目(51004007)
关键词
跨尺度
边坡
地应力场
反演
重构
cross-scale
slope
geo-stress field
back-analysis
reconstruction
