综合物探方法在地面塌陷成因分析中的应用  

Application of Comprehensive Geophysical Methods in the Analysis of the Causes of Ground Collapse

作　　者：王国云 游连强[1] 闫维华 倪泽森 杨艺 WANG Guoyun;YOU Lianqiang;YANG Weihua;NI Zesen;YANG Yi(Geological Party,Guizhou Bureau of Geology&Mineral Exploration and Development,Duyun 558000,China)

机构地区：[1]贵州省地质矿产勘查开发局一0四地质大队,贵州都匀558000

出　　处：《河南科技》2023年第10期110-113,共4页Henan Science and Technology

摘　　要：【目的】查明贵州某地地面塌陷的形成原因。【方法】根据现场地质背景及岩溶发育情况,结合塌陷区岩溶发育、地下水径流及节理裂隙发育情况,采用高密度电法、音频大地电磁法及充电法等综合物探方法对其不良地质体进行勘查。【结果】通过高密度电法查清了地表覆盖层厚度及岩溶发育的空间位置;通过音频大地电磁法查清了塌陷区的节理裂隙发育带;通过充电法大致查清了地下水径流方向及位置。【结论】该地区地面塌陷的主要原因是某隧道开挖破坏了当地的地下水平衡,地表形成“土洞”,最终导致的地面塌陷。[Purposes]To find out the causes of ground collapse in Guizhou.[Methods]According to the geological background and karst development of the site,combined with the karst development,ground-water runoff and joint fissure development in the subsidence area,the high-density electrical method,au-dio magnetotelluric method and charging method were used to explore the unfavorable geological bodies.[Findings]The thickness of the surface overburden and the spatial location of karst development were clarified by high-density electrical method.The joint fracture development zone in the collapse area was identified by audio geomagnetism.The direction and location of groundwater runoff were roughly deter-mined by the charging method.[Conclusions]The main reason for the ground collapse in this area is that the excavation of a tunnel destroys the local groundwater balance,and the surface forms a"soil cave",which eventually leads to ground collapse.

关 键 词：综合物探方法 地面塌陷 充电法 高密度电法 音频大地电磁法 

分 类 号：P631[天文地球—地质矿产勘探] P642.26[天文地球—地质学]