岩石力学性质正交各向异性确定方法研究

Research on Ascertaining Method of Rock Mechanics Orthotropy

岩石力学性质各向异性研究是岩石力学领域的一个经典问题。近年来,随着对地层特点的深入认识和测量仪器、手段的进一步改善,关于深层岩石力学性质各向异性的研究又开始活跃起来。系统分析了目前常用的几种确定岩石力学性质正交各向异性的室内外实验方法,指出了每种方法的优点和不足之处。提出了开展深层岩石力学真三轴实验以便更真实地获取相关力学参数的新思路。同时认为,现场应大力推广利用偶极声波测井评价地层各向异性的新技术,成本虽高,但前景广阔。

The research on the anisotropy for rock mechanics properties is a classic problem in the realm of rock mechanics.With people's in-depth knowledge of formation features and the development of test apparatus and means,the study on the anisotropy for deep zone rock mechanics properties becomes active again.In this paper,a systematic analysis is made on several existing conventional laboratory and field experimental methods of ascertaining the orthotropy for rock mechanics properties.The advantages and demerits of each method are pointed.A new train of thoughts of launching true triaxial test for deep zone rock mechanics is put forward so as to more true acquire the related mechanics parameters;moreover,it is thought that a new technique to evaluate the formation anisotropy by using cross-multipole array acoustilog in fields should be vigorously generalized.