| 汶川M_S8.0地震对龙门山断裂带附近地应力环境影响初探——以北川、江油地区为例 |
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| 引用本文： | 丰成君,陈群策,谭成轩,吴满路,秦向辉,廖椿庭.汶川M_S8.0地震对龙门山断裂带附近地应力环境影响初探——以北川、江油地区为例[J].地震学报,2013,35(2):137-150. |
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| 作者姓名： | 丰成君 陈群策 谭成轩 吴满路 秦向辉 廖椿庭 |
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| 作者单位： | 1.中国北京 100081 中国地质科学院地质力学研究所 |
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| 基金项目： | 国土资源部深部探测技术与实验研究专项，中国地质调查局项目"青藏高原东缘主要断裂带地应力监测" |
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| 摘 要： | 为探讨汶川MS8.0地震对龙门山断裂带现今地应力环境的影响,2009年10—12月,在龙门山断裂带的北川、江油地区开展了3个200m深度钻孔水压致裂地应力测量,获得了汶川MS8.0地震发生1年多以后断裂带附近地壳浅表层地应力环境.根据研究区内的原地应力测量结果及汶川MS8.0地震引起的断层错动等资料,运用线弹性有限元数值模拟方法,计算得到了由断层错动位移所产生的附加应力,并推算了ZK02和ZK03位置震前应力分布特征.通过对比分析,揭示了断裂带附近地应力场的变化规律,探讨了汶川MS8.0地震对龙门山断裂带附近地应力环境的影响.
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| 关 键 词： | 龙门山断裂带 水压致裂地应力测量 地应力环境 线弹性有限元数值模拟 |
| 收稿时间： | 2011-12-23 |
A preliminary study of the influence of Wenchuan MS8.0 earthquake on in-situ stress state near Longmenshan fault zone: A case study in Beichuan and Jiangyou areas |
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| Feng Chengjun
,
Chen Qunce
,
Tan Chengxuan
,
Wu Manlu
,
Qin Xianghui
,
Liao Chunting.A preliminary study of the influence of Wenchuan MS8.0 earthquake on in-situ stress state near Longmenshan fault zone: A case study in Beichuan and Jiangyou areas[J].Acta Seismologica Sinica,2013,35(2):137-150. |
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| Authors: | Feng Chengjun Chen Qunce Tan Chengxuan Wu Manlu Qin Xianghui Liao Chunting |
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| Affiliation: | 1.Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China2.Key Laboratory of Neotectonic Movement & Geohazard, Ministry of Land and Resources, Beijing 100081, China |
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| Abstract: | In order to investigate the influence of Wenchuan MS8.0 earthquake on in-situ stress state near the Longmenshan fault zone, hydraulic fracturing measurements in three 200 m-deep boreholes were carried out in Beichuan and Jiangyou areas near the fault zone from Oct. to Dec., 2009, and the distribution of current in-situ stress there at the time more than 1 year after the earthquake was analyzed. Based on the in-situ stress measurements and coseismic fault displacement in the study areas, the distribution of additional stress induced by fault motion was calculated with a linear-elastic finite element simulation, and then distribution of the principal stress at the two boreholes before the earthquake was calculated. Finally, the influence of Wenchuan MS8.0 earthquake on in-situ stress state in a superficial zone near Longmenshan fault was discussed through comparative analysis. |
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