摘要
岩溶塌陷问题是近年来数量呈上升趋势的一种地质灾害类型。研究岩溶地面塌陷诱发因素的地球物理场特征,在室内建立岩溶塌陷模型模拟各种外力条件诱发岩溶塌陷过程,采用物探手段监测岩溶塌陷发生前、中、后地球物理场变化规律,模拟试验表明发生岩溶塌陷时电阻率、电位发生显著变化,震动监测可以通过异常振幅、振幅频谱、实时H/V值、时频分析等方式监测岩溶塌陷信号。野外长周期的数据与水文监测孔对比,验证物探方法监测数据与水文数据的相关性,建立以电性、震动信号为主的监测预警技术手段。多参数、多视角的数据处理方法既大大丰富了采集的信号解译,又提高了解译准确度,对地质灾害防治工作可起到较好的支撑。
Karst collapse is a kind of geological disaster which is on the rise in recent years.The geophysical field characteristics of the inducing factors of karst ground collapse are studied.The karst collapse model is established indoors to simulate the process of karst collapse induced by various external conditions.The geophysical field changes before,during and after karst collapse are monitored by geophysical methods.The simulation test shows that the resistivity and potential change significantly when karst collapse occurs.The vibration monitoring can monitor the karst collapse signal by abnormal amplitude,amplitude spectrum,real-time H/V and time-frequency analysis.The correlation between the monitoring data of geophysical prospecting method and hydrological data is verified by comparing the field long-term data with the hydrological monitoring hole.The monitoring and early warning technology based on electrical and vibration signals is established.The multi-parameter and multi-angle data processing method greatly enriches the collected signal interpretation,improves the accuracy of interpretation,and can well support the prevention and control of geological disasters.
作者
李成香
刘磊
周世昌
王斌战
Li Chengxiang;Liu Lei;Zhou Shichang;Wang Binzhan(Hubei Institute of Geophysical Exploration,Wuhan,Hubei 430056)
出处
《资源环境与工程》
2021年第6期887-894,共8页
Resources Environment & Engineering
基金
湖北省地质局地质科技项目“城市地下空间开发利用对地质环境影响评价与监测关键技术研究”(KJ2019-27、KJ2020-28)。
关键词
高密度电法
微地震监测
振幅分析
频谱分析
high density resistivity method
microseismic monitoring
amplitude analysis
spectral analysis
