构造应力面研究  

RESEARCH ON TECTONIC STRESS PLANE

作　　者：谭成轩[1] 石玲[1] 孙炜锋[1] 雷伟志[1] 孙叶[2] 王瑞江[3] 吴树仁[1] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质科学院城市与工程场地稳定性研究中心,燕郊065201 [3]中国地质调查局,北京100035

出　　处：《岩石力学与工程学报》2004年第23期3970-3978,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国土资源部百名优秀青年科技人才计划和国家自然科学基金(49802017)资助课题。

摘　　要：所定义的构造应力面的概念为三维空间不同地点非构造应力影响消失的深度点构成的曲面。为此,对似 U形沟谷按不同沟谷宽度、山体坡度和山体高度建立三维模型,分别考虑重力、水平侧压力以及二者联合进行三维应力场有限元数值模拟,分析最大水平主压应力在空间的变化规律,并进行数学统计分析,给出构造应力面深度随上述因素变化的经验公式。研究结果表明水平侧压力和山体高度是影响构造应力面深度的主要因素,当水平侧压力随深度变化梯度与重力梯度之比等于 1 时,在沟谷谷底,构造应力面深度近似等于山体高度。The concept of tectonic stress plane (TSP) is defined as an ideal curved plane drawn by the locations with different depths where the influence of non-tectonic stress disappears. Therefore, to U-like valleys, three-dimensional model with consideration of different factors, such as valley width, mountain slope, mountain height, gravity loading, and horizontal lateral compression, respectively, is made to conduct 3D finite element modeling research on the spatial variation law of the maximum horizontal principal compressive stress in crust. By mathematical statistics and analysis, the empirical formula is given to show the TSP depth changed with the above factors. The research shows that horizontal lateral compression and mountain height are the major factors to affect the TSP depth, and that when the ratio of the gradient of horizontal lateral compression varied with depth to the gravity gradient is obtained as one, the TSP depth is approximatelly equal to mountain height.

关 键 词：岩石力学 非构造应力 构造应力面 三维应力场有限元模拟 最大水平主压应力 

分 类 号：TD311[矿业工程—矿井建设]