摘要
为了分析复杂地应力情况下横观各向同性岩体参数对地应力反演结果的影响程度,假定岩体参数在±50%的波动范围内变化并进行数值模拟,观察反演结果的变化情况。结果表明,已知参数波动越大,反演结果失真程度越高,呈现线性相关性。各向同性面内的弹性模量E的精确度对反演结果影响最大,垂直各向同性面方向的泊松比μ'次之,各向同性面内的泊松比μ再次之,垂直各向同性面方向的弹性模量E'对反演结果影响较小。
In order to analyze the effect degree of parameters of transverse isotropic rock mass on geo stress back analysis, the numerical simulation when the rock mass parameters are fluctuated in a range from -50% to ＋ 50% is carried out to observe the changes of results of geo stress back analysis parameter. The results show that if the fluctuation of parameter relative to exact value is greater, the distortion degree of back analysis result will be higher. The fluctuation of known parameter has a linear correlation with the results of back analysis. The accuracy of modulus of elasticity E has greatest impact on back analysis results, the impact of Poisson＇s ratio μ′ is weaker than the former, the impact of Poisson＇s ratio μ is in the third place, and the impact of modulus of elasticity E＇ is relatively minor.
出处
《水力发电》
北大核心
2017年第6期32-38,共7页
Water Power
基金
NSFC-河南人才培养联合基金项目(U1204509)
河南省高等学校青年骨干教师资助计划项目(2015GGJS-192)
河南省高等学校重点科研项目资助计划项目(15A570005)
关键词
横观各向同性岩体
地应力
反演参数
敏感度
transverse isotropic rock mass
geo stress
back analysis parameter
sensitivity
