| 新疆泥火山发育区场地震陷灾害机理探讨 |
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| 引用本文： | 许世阳,柴少峰,尹光华,王平,蒲小武.新疆泥火山发育区场地震陷灾害机理探讨[J].西北地震学报,2021,43(1):63-69. |
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| 作者姓名： | 许世阳 柴少峰 尹光华 王平 蒲小武 |
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| 作者单位： | 中国地震局兰州地震研究所 中国地震局黄土地震工程重点实验室, 甘肃 兰州 730000;新疆维吾尔自治区地震局, 新疆 乌鲁木齐 830011;防灾科技学院, 河北 065201 |
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| 基金项目： | 中国地震局地震科技星火计划项目（XH17037Y）；甘肃省重点研发计划（18YF1FA101）；中国地震局地震预测所基本科研业务费专项（2018IESLZ07） |
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| 摘 要： | 粒度组分是影响黄土震陷的重要因素之一.通过采集新疆艾其沟泥火山泥质碎屑喷出样品和泥火山发育区域出露的沉积剖面泥质碎屑样品,利用激光粒度分析测试的实验方法对样品进行粒度测试,分别对样品中值(Md)、均值(Mz)、标准偏差(σφ)、偏度(SK1)、峰度(KG)等粒度参数进行分析.研究结果显示:艾其沟泥火山泥质沉积物粒度组分...
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| 关 键 词： | 泥火山 粒度分析 震陷灾害 |
| 收稿时间： | 2019/4/26 0:00:00 |
Discussion on the Mechanism of Seismic Subsidence Disaster in Mud Volcanic Area of Xinjiang |
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| XU Shiyang,CHAI Shaofeng,YIN Guanghu,WANG Ping,PU Xiaowu.Discussion on the Mechanism of Seismic Subsidence Disaster in Mud Volcanic Area of Xinjiang[J].Northwestern Seismological Journal,2021,43(1):63-69. |
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| Authors: | XU Shiyang CHAI Shaofeng YIN Guanghu WANG Ping PU Xiaowu |
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| Institution: | Key Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Xinjiang Earthquake Agency, Uygur 830011, Xinjiang, China;Institute of Disaster Prevention, Sanhe 065201, Hebei, China |
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| Abstract: | Particle size is one of the important factors that affect loess seismic subsidence. In this study, samples were collected from the muddy debris of Aiqi Gully mud volcano and nine samples were obtained from the sedimentary sections in surrounding mud volcano area. Laser test was used to determine particle size. Particle size parameters such as median value (Md), mean value (Mz), standard deviation (σφ), skewness (SK1), and kurtosis (KG) were analyzed. Results show that the Aiqi Gully volcano samples are dominated by silt (56%) and clay (44%). The particle size distribution is characterized by partial modality and positive skewness. The particle size of the sedimentary stratum samples are dominated by silt, which accounts for 60%-70%, and the clay contents considerably vary in different strata. Some sediment samples contain 15%-20% clay and 10% very fine grains. The grain size characteristics are similar to those of Tianshan loess. The clay content in the loess directly affects its seismic resistance, that is, the anti-seismic resistance of the loess increases with increasing clay content. The sedimentary grain size significantly increases in the clay component after transformation by mud volcanic sedimentation. Therefore, the sediments are gradually transformed from silty loess to clay loess by mud volcanic activity. The stability of the clay loess is high, thereby improving the seismic resistance of the sediments. However, the seismic resistance of the loess is affected by many factors. As such, further study is needed to quantitatively analyze the influence of mud volcano activity on the site seismic subsidence disaster. |
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| Keywords: | mud volcano gran size analysis seismic subsidence disaster |
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