综合物探方法对北京市延庆区泥石流堆积层探测的应用研究  

Application study of comprehensive geophysical prospecting method todetect debris flow accumulation layer in Yanqing District of Beijing

作　　者：籍增贤[1,2,3] 孙永彬 李毅[1,2,3] 张占彬 王诜[1,2,3] 宋振涛 张正阳 JI Zengxian;SUN Yongbin;LI Yi;ZHANG Zhanbin;WANG Shen;SONG Zhentao;ZHANG Zhengyang(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource,Shijiazhuang 050002,Hebei,China;Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology,Shijiazhuang 050002,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核集团铀资源地球物理勘查技术中心(重点实验室),河北石家庄050002 [3]河北省航空探测与遥感技术重点实验室,河北石家庄050002

出　　处：《矿产与地质》2022年第1期172-177,共6页Mineral Resources and Geology

摘　　要：由于泥石流堆积层堆积松散,其电阻率及波速与下伏基岩层存在显著差别,在反演电阻率断面和雷达影像图上形态迥异,堆积层与基岩接触界面容易被识别。为查明北京市延庆区某泥石流沟域内松散堆积层厚度和分布范围,采用高密度电阻率法和探地雷达进行了综合测量,快速、有效地查明了两者接触界面的起伏形态,探明了松散堆积层的厚度,推断结果与后期探槽揭露情况吻合较好。成果表明:高密度电阻率法和探地雷达综合测量为评估泥石流沟域内松散堆积层的分布规模与地质灾害危险程度评估、估算土石方量和制定防御及治理方案提供了科学依据。Due to the loose feature of debris flow accumulation layer,the resistivity and wave velocity of debris flow accumulation layer are significantly different from those of underlying bedrock layer,and the shapes of resistivity inversion section and radar image are quite different,so the contact interface between accumulation layer and bedrock is easy to be identified.In order to find out the thickness and distribution range of the loose accumulation layer in a debris flow gully domain in Yanqing District of Beijing,the high density resistivity method and ground penetrating radar are used for comprehensive survey.The undulating shape of the contact interface between the two layers is quickly and effectively found out,and the thickness of loose accumulation layer is also detected.The result of the prediction is in a good agreement with that of the later exploration trench.The study result shows that the high-density resistivity method and GPR comprehensive survey provide a scientific basis to evaluate the distribution scale of loose accumulation layer and the risk degree of geological disasters in debris flow gully area,to estimate the amount of earthwork and to formulate the prevention and control scheme.

关 键 词：高密度电阻率法 探地雷达 泥石流 堆积层 延庆区 北京 

分 类 号：P631[天文地球—地质矿产勘探]