中文摘要：

利用滇西地震预报试验场1985-2010年重力重复观测数据，结合地质调查和地球物理研究结果确定的初始断层运动模型，考虑地壳介质分层、粘滞性和自重效应影响，利用开发的基于遗传算法的三维断层运动反演程序，反演获取了滇西地区主要活动断裂运动的时间变化分布图像。结果表明：滇西1985-2010年断层运动的时间变化表现出往复运动特征，较好地反映了区域6．0级以上地震的孕育过程；红河断裂深浅构造运动存在差异性与一致性，并通过强震孕育发生调节其转换关系；断层运动的时间变化具有运动加速-加速到峰值-运动减速-再加速-再减速到一定程度发生地震的过程。

英文摘要：

rithms with the An evolution of activity of main faults in Western Yunnan is inversed by use of the genetic algo- repeat gravity datum from 1985 to 2010 based on the original fault model and consideration for crust layering,viscosity and gravitational effect. The results indicate that the fauhs have characteristics of reciprocating motion, and reflect well preparation process of earthquakes greater than Ms6.0. There are difference and consisten- cy between the tectonic movement of shallow and deep part of Red River Fault Zone, which regulate the conversion relation by strong earthquake preparation and occurrence. The movement of the faults can be divided into several steps： speed up, speed up to peak value, speed-down, speed up again, speed-down again. Earthquakes occur on the last step.