青海格尔木-五道梁地区现今地应力测量结果及其构造分析

本文给出了格尔木一五道梁地区近年地应力测量的结果，并据此进行了构造分析。实测结果表明：最大主应力的方向总体上与区域构造应力场的方向基本一致，呈NE向，局部地区主应力的方向受局部断裂的影响而不同于区域应力场的方向。在地震前后，主应力的大小和方向均发生变化。在震后，昆仑山断裂带附近地应力数值降低约三分之二。

Current Stress Measurement and Structure Analysis of Golmud-Wudaoliang Region in Qinghai Province

This paper deals with the results of stress measurements performed in recent years at different sites in Geermu-Wudaoliang region of Qinghai Province. On such a basis, structure analysis was carried out. The direction of the principal stress is generally northeastward, consistent with that of the regional stress field. Nevertheless, the direction of principal stress affected by local faulting is always different from the direction of regional structural stress field near the fault. Both the value and the direction of stresses tend to change before and after the earthquake. At the sites near the Kunlun fault zone, the stress value is higher before earthquake than after earthquake. The value of stress after earthquake is one-third the value before earthquake.Earthquake is the performance of stress release, and the information of earthquake might be gathered through measuring the stress variation.