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Prospect and research progress of detecting dynamic change in crustal stress by bedrock temperature
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作者 shunyun chen Qiongying Liu +1 位作者 Peixun Liu Yanqun Zhuo 《Geohazard Mechanics》 2023年第2期119-127,共9页
A new method of detecting stress change by temperature(DSCT),has been recently proposed on the basis of the experimental results in laboratory,and verified by field observation.In this paper,at first,physical backgrou... A new method of detecting stress change by temperature(DSCT),has been recently proposed on the basis of the experimental results in laboratory,and verified by field observation.In this paper,at first,physical background is concisely introduced,and experimental researches are followed.Then,the key techniques are reviewed,and the main results on in-situ observations are also given in detail.At last,we emphasize on the prospects of this method for being investigated further.The potential prospect includes six contents:(1)to observe the tidal force and its secondary fluid thermal effect;(2)to study temperature response to change in direction of the stress change;(3)to carry out practical engineering application;(4)to analyze the strong earthquake risk,based on bedrock temperature observation;(5)to conduct in situ experiment on DSCT;(6)to explain quantitatively the satellite thermal infrared anomaly.In short,considering that the dynamic change of the crustal stress is a key parameter of earthquake forecasting or engineering application,the method of DSCT has important practical significance for earthquake risk or engineering applications. 展开更多
关键词 Detecting stress change by temperature(DSCT) Crustal stress Bedrock temperature Co-seismic response In situ experiment
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热测应力:测震学证据 被引量:7
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作者 陈顺云 刘培洵 +1 位作者 陈立春 刘琼颖 《科学通报》 EI CAS CSCD 北大核心 2020年第22期2395-2405,共11页
通过基岩温度观测可以获取地壳应力动态变化信息(称热测应力),但缺乏与其他观测手段的对比验证.本研究基于康定Ms6.3级地震同震温度响应,结合测震学结果,对同震应力变化的量级和空间分布特征等开展对比分析.结果显示:(1)热测应力与测震... 通过基岩温度观测可以获取地壳应力动态变化信息(称热测应力),但缺乏与其他观测手段的对比验证.本研究基于康定Ms6.3级地震同震温度响应,结合测震学结果,对同震应力变化的量级和空间分布特征等开展对比分析.结果显示:(1)热测应力与测震学两种方法获得的结果,应力变化的量级一致;从应力张压特性与温度变化上看,拉张降温,挤压升温,与理论和实验结果相吻合.(2)依据不同基岩温度测点获得的应力变化的张、压分区情况,康定地震的震源体深度更接近于测震学研究结果的上限范围.这意味着,基于基岩温度获取的地壳应力变化结果,可对震源分析提供一个新的约束条件.总之,随着基岩温度测量技术的提高,基岩温度观测有可能成为一种观测地壳应力动态变化的常规手段. 展开更多
关键词 热测应力 基岩温度 地壳应力 康定地震 同震响应
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