| 北京昌平十三陵钻孔地应力测量与实时监测在断层活动危险性分析中的应用探讨 |
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| 关键词:Beijing region in-situ stress measurement in-situ stress real-time monitoring frictional sliding criteria seismic hazard |
| 基金项目:中国地质调查局地质矿产调查评价专项“首都圈地区关键构造部位深孔地应力测量监测与地质安全评价”(编号: 12120113012100);国土资源部公益性行业科研专项“我国东部沿海核电站区域地壳稳定性与地质灾害研究”(编号: 201211096) |
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| The Application of in Situ Stress Measuring and Real-time Monitoring Results to Analyzing the Fault Activity Hazard at Ming Tombs Borehole in Changping District, Beijing |
| According to the elasticity of the stress tensors superposition principle, the authors calculated the stress state in different periods at the borehole drilled at Ming Tombs, Changping District, Beijing, attempting to apply the data obtained by in-situ stress measuring and monitoring. Based on the frictional sliding criteria, this paper deals with the sliding of piedmont Nankou fault near the borehole, which serves as an important implication for understanding the seismic hazard in this region. The in-situ stress results show that, at the stages of early January, 2010 and March 31, 2013, the average maximum horizontal principal stress was respectively 5.30 Mpa and 7.56 MPa, showing an increasing trend; the direction of maximum horizontal principal stress was gradually converted from NNW to NE–nearly EW. The ratio between shear stress and normal stress on the fault plane revealed that, at the stages of early January, 2010 and the end of March, 2013, the average ratio was respectively 0.12 and 0.22 at the depth of 98 m, which didn’t achieve the threshold sliding friction coefficient 0.6 of the fault. However, the increasing trend of the average ratio indicates that the tectonic activity in the region may increase to some extent. The phenomenon deserves further attention. |
| FENG Cheng-jun,ZHANG Peng,SUN Wei-feng,TAN Cheng-xuan.2014.The Application of in Situ Stress Measuring and Real-time Monitoring Results to Analyzing the Fault Activity Hazard at Ming Tombs Borehole in Changping District, Beijing[J].Acta Geoscientica Sinica,35(3):345-354. |
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