【摘要】 自重场和构造场是形成初始地应力场的两个主要因素,而构造运动的作用形式、作用组合方式、作用方向和作用大小则是反演分析初始地应力场的关键。提出一种初始地应力场反演方法,建立各种可行方案的模糊评判库及隶属度函数,采用模糊评判的方法辨识初始地应力场构造运动作用形式、组合方式及作用方向,利用遗传算法反演出各系数,从而得到整个区域的初始地应力场。最后通过算例进行了验证分析,表明该方法的有效和可行性。更多还原

【Abstract】 The initial in-situ geo-stress field is composed of the gravity field and the structural field.The form,combination,direction and magnitude of the structural motion actions are the key factors for inversion analysis of initial in-situ field.An inversion method of initial in-situ geo-stress field is proposed in this paper.Fuzzy evaluation database and fuzzy subordinate degree for each of the feasible options are established.A method of fuzzy evaluation is used to identify the forms,combination and direction of the structural motion actions of the initial geo-stress field,and the genetic algorithm is used to obtain the coefficients,thus the initial in-situ geo-stress field of the whole region is obtained.The case study results show that the method is very effective and feasible.更多还原