滇西北地区近年来应力场的数值模拟研究  

The Numerical Simulation of Stress Field in Northwest Yunnan in Recent Years

作　　者：武永彩[1] 李昂[2] 唐红涛[3] WU Yongcai;LI Ang;TANG Hongtao(Xi’an Siyuan University,28 Shui’an Road,Xi’an 710038,China;School of Architecture and Civil Engineering,Xi’an University of Science and Technology,58 Mid-Yanta Road,Xi’an 710054,China;The Second Monitoring and Application Center,CEA,316 Xiying Road,Xi’an 710054,China)

机构地区：[1]西安思源学院,西安市水安路28号710038 [2]西安科技大学建筑与土木工程学院,西安市雁塔中路58号710054 [3]中国地震局第二监测中心,西安市西影路316号710054

出　　处：《大地测量与地球动力学》2018年第12期1238-1240,1279,共4页Journal of Geodesy and Geodynamics

基　　金：陕西省自然科学基金(2016JM4014)~~

摘　　要：建立滇西北地区三维有限元地质模型,将2009～2016年GPS速度场数据作为数值模拟的位移边界条件,模拟获取该地区的构造应力场。结果表明,在楚雄至滇西北地区整体显示张性应力区;出现由"洱源鹤庆断裂-红河断裂-程海断裂"圈起的低值张性区,区域内部张性应力明显低于外部,这种张应力低值区尤其在区域四周断裂边界处,往往是地壳断裂活动的频发区;曲江断裂北端及元谋-绿汁江断裂南端出现张性应力集中区,是今后重点关注的断裂结点。In this paper,a three-dimensional finite element model is established for northwest Yunnan province.The tectonic stress field of the area is simulated by using 2009~2016 GPS velocity field data as the displacement boundary condition of numerical simulation.The results show that:Chuxiong to the northwest of Yunnan province shows overall tensional stress;in the area circled by Eryuan-Heqing,Honghe,Chenghai faults,the internal tensile stress is significantly lower than that of the outside;the low value area,especially around the boundary fault,is often in areas of frequent crustal faulting;the north of Qujiang fault and the south of Lüzhijiang fault present a tensional stress concentration zone,which will be focused on in the future.

关 键 词：滇西北 GPS速度场 应力场 数值模拟 

分 类 号：P313[天文地球—固体地球物理学] P315[天文地球—地球物理学]