| 残余和现今应力场重迭法预测强震危险时区 |
| |
| 引用本文： | 安欧,高国宝,李群芳,李桂荣.残余和现今应力场重迭法预测强震危险时区[J].大地测量与地球动力学,1994(1). |
| |
| 作者姓名： | 安欧 高国宝 李群芳 李桂荣 |
| |
| 作者单位： | 国家地震局地壳应力研究所 |
| |
| 摘 要： | 以红河断裂带测区为例，用Ｘ射线法测量了测区的古构造残余应力场及其应变能密度场，用有限单元法计算了测区在两种边界条件下的水平最大剪应力场，用实验和理论证明了古构造残余主压应力大小和方向对岩石破坏、破裂扩展和震级的影响。用上述方法预测，松平—南涧、玉溪—开远、普洱为测区内强震危险区段。结合地球自转角速度相对变率的天文观测曲线在时间轴上的外延，预测得１９８９－１９９６、１９９９－２００４、２００７－２０１３、２０１６－２０１８年为测区内强震危险时段。
|
| 关 键 词： | 残余应力场，现今应力场，重迭法，危险区，危险时段 |
FORECAST METHOD FOR RISK AREA AND RISK TIME OF STRONG EARTHQUAKE BY SUPERIMPOSING THE RESIDUAL AND PRESENT STRESS FIELD |
| |
| An Ou,Gao Guobao,Li Qunfang and Li Guirong.FORECAST METHOD FOR RISK AREA AND RISK TIME OF STRONG EARTHQUAKE BY SUPERIMPOSING THE RESIDUAL AND PRESENT STRESS FIELD[J].Journal of Geodesy and Geodynamics,1994(1). |
| |
| Authors: | An Ou Gao Guobao Li Qunfang and Li Guirong |
| |
| Abstract: | The paleotectonic residual stress field and its strain energy density field in Honghe fracture zone was measured by x-ray diffraction technique.The horizontal maximum shear stress field of the measuring area with two boundary conditions is calculated by limited unit analysis method and the effects of negnitude and direction of paleotectonic residula principal compressive stress on rock break ,crack propagation,and earthquake magnitude are discussed. On the basis of above results it is forecasted that Songping-Nanjian,Yuxi-Kaiyuan and Puer are risk areas of strong earthquake in measuring area and 1989-1996,1999-2004, 2007-2013,2016-2018 are risk perilds of strong earthquake in the measuring area with the temporal extension of astrobservational curve showing the variations of yearly average value of relative change rate of angular velocity of earth's rotation. |
| |
| Keywords: | residual stress field present stress field suporimposing method risk area risk time |
| 本文献已被 CNKI 等数据库收录！ |
