| 断层滑动对邻近场的影响 |
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| 引用本文： | 苏刚,麻水歧,王莉.断层滑动对邻近场的影响[J].西北地震学报,1988,10(4):29-35. |
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| 作者姓名： | 苏刚 麻水歧 王莉 |
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| 作者单位： | 陕西省地震局
(苏刚，麻水歧)，陕西省地震局(王莉) |
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| 摘 要： | 对含一组裂纹的平板模型的有限元计算表明,在断层滑动后,其附近应力场发生了较大变化,有的应力场方向几乎偏转了90°。这可能是震前P轴偏转的一种力学机制。当把裂纹间的关系类比为一组断层时,计算结果表明,断层的滑动将影响附近断层,使有的断层滑动的可能性增大,而有的断层滑动的可能性减小,即对有的断层起了“加震”作用,而对有的起了“减震”作用。由此看出,成组发生的地震间表现出“自序性”。依此自序特点对华北第三、四活动期中地震幕作了划分,结果与其它研究所划分的一致。因此,本项研究也是对地震幕物理涵义的一种探讨。
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| 收稿时间： | 1988/1/6 0:00:00 |
INFLUENCE OF FAULT SLIP ON STRESS FIELD AROUND IT |
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| Su Gang,Ma Shuiqi and Wang Li.INFLUENCE OF FAULT SLIP ON STRESS FIELD AROUND IT[J].Northwestern Seismological Journal,1988,10(4):29-35. |
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| Authors: | Su Gang Ma Shuiqi and Wang Li |
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| Institution: | Seismological Bureau of Shaanxi Province,Seismological Bureau of Shaanxi Province and Seismological Bureau of Shaanxi Province |
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| Abstract: | The finite element computation for the plant model of containing a group of cracks shows that stress field is homgeneous before the fault slip, but the stress field near the fault changes much large after the fault slip. The direction of the stress field in local area has rotated nearly 90°. It is a possible mechanical mechanism of rotation of P axis in the preearthquake. When the relation of a group of faults in the geology is simulated by the relation of the cracks, the calculation results show that the possibility of slip of some faults is increased, and the possibility of slip of other faults is decreased, because the slip from one of the group of faults. It means that the possibility to occur earthquake is increased for some faults and the one is decreased for other. So, the earthquakes in groups exist the relation under control of the dynamics called the "self-control". Using this result we have divided the "Seismic Curtain" in north China from 1484 to now. |
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