断层分形几何学在判定强震危险区中的应用前景初探

PRELIMINARY DISCUSSION ON APPLYING FAULT FRACTAL GEOMETRY TO DETERMINE THE STRONG EARTHQUAKE RISK AREA

本文利用box—Counting法讨论了新疆各主要断裂带的几何分形,得出了各断裂带的分维值。结合区域构造及地震活动性特点,分析讨论了断层分形几何学在判定强震危险区方面的应用前景。结果表明,相应于较大的断层分维数,则对应于较强的地震活动水平;相应于较小的断层分维值,则对应于较弱的地震活动水平。一方面,断裂分维值较高的断裂带,其构造也较复杂。因而,断层分维有可能作为判定活动断裂带地震活动水平的一种特征物理量。

In this paper ,geometric fractal of main fault zones in Xinjiang was discussed by using the Box—Counting method, and obtained the fractal values of these zones. Combined the regional tectonic and the seismic active characteristics, the paper was analysed and discussed the applied future of the fault fractal geometry to determine the strong earthquake risk areas. The results showed that the higher fault fractal value corresponded the stronger seismic activity; the lower fault fractal value corresponded the weaker seismic activity. On the other hand ,fault zones of the higher fault fractal values corresponded the more complicated structures. So, the fault fractal may be a characteristic geophysics quantity to determine the active seismicity level.