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一、引言郯城—庐江断裂带为我国大陆板块内部的一级大地构造单元,特别是该断裂带以其大规模的走滑运动而著称。它的活动强度、活动方式及活动规律对我国东部地震活动特征起到重要的杠杆作用。因此,探讨断裂带展布区构造应力场的性质,对预报我国东部地区的强震有其重要意义。有限单元法作为一种理想的数学物理模型和探索区域构造应力场的有效手段,近年来在地震地质学中得到了广泛的应用。本文试图运用这种方法于苏鲁皖地区,对郯庐断裂带中段作一些初步的定量分析。
I. INTRODUCTION The Gaocheng-Lujiang fault zone is a first-order tectonic unit within the continental plate of China, especially the fault zone is known for its large-scale strike-slip movement. Its activity intensity, activity mode and activity law play an important leverage role in the seismic activity in eastern China. Therefore, it is of great significance to forecast the tectonic stress field in the distribution area of the fault zone and predict the strong earthquakes in the eastern part of China. Finite element method is an ideal mathematic model and an effective method to explore the stress field in the area. It has been widely used in seismology and geology in recent years. This article attempts to use this method in the Sulu Wan area, the middle part of the Tan-Lu fault zone for some preliminary quantitative analysis.