This article presents a research study of complex limestone karst engineering-geological conditions in the municipality Valaskanear Banska Bystrica in Slovakia.The aim of the study is to demonstrate the impossibility ...This article presents a research study of complex limestone karst engineering-geological conditions in the municipality Valaskanear Banska Bystrica in Slovakia.The aim of the study is to demonstrate the impossibility of spatial identification of cave spaces using surface geophysical methods due to the specific engineering-geological conditions of a thick surface layer of anthropogenic fill containing highly heterogeneous anthropogenic material.Its maximum thickness is 3 m.Another specificific condition of the study area is its location in the built-up area,due to which the applicability of geophysical methods was limited.The article contains methodological recommendations to be used in analogous geological conditions with karst structures topped with anthropogenic fill,which complicates the identification of cave spaces.The recommended solution herein is the identification of the cave system using underground mapping of the karst and its projection onto the surface for which surface geophysical methods have been combined.展开更多
A magnetotelluric study was carried out in the Xuefeng mountain uplift belt and its western margins. A detailed investigation was made of the resistivity of the formations, and reliable data were obtained. The sedimen...A magnetotelluric study was carried out in the Xuefeng mountain uplift belt and its western margins. A detailed investigation was made of the resistivity of the formations, and reliable data were obtained. The sedimentary cover and basement structure of the Xuefeng mountain area and the deep geological structure were analyzed in detail using magnetotelluric data from the twodimensional inversion of the resistivity profile data in combination with regional gravity and magnetic data. It was concluded that the tectonic movements were characterized by basement detachment, and north-south ramp.The study area can be divided into a southern uplift zone, a southern thrust-faulted zone, a central uplift zone, and a northern depression zone. This work has provided geophysical evidence that can be used in future studies of the tectonics and petroleum geology of this region.展开更多
露天矿山边坡矿体内部存在裂隙、节理等岩体结构,对边坡稳定性产生直接或间接的影响。而单一的物探技术只能获取地质结构某一方面的信息,在地质勘探方面存在局限性。为确保边坡稳定,设计一种综合物探技术下露天矿山边坡地质勘测方法。...露天矿山边坡矿体内部存在裂隙、节理等岩体结构,对边坡稳定性产生直接或间接的影响。而单一的物探技术只能获取地质结构某一方面的信息,在地质勘探方面存在局限性。为确保边坡稳定,设计一种综合物探技术下露天矿山边坡地质勘测方法。以地下介质电阻率、密度等地球物理特征为依据,融合瞬变电磁法、高密度电法、地震映像法作为综合物探手段,在Geogiga Front End Free软件工具上,形成地震映像图和视电阻率截面图。根据所得勘测结果显示,通过地震映像法能准确描述出地质形态、地层结构和厚度,高密度电法能够清晰展示出边坡区域下浅层塌陷部分的空间范围及低阻特性明显的填充物,瞬变电磁法能够准确地对超过百米深的地层中的异常体做出响应,证明综合物探技术具有良好的勘探能力。展开更多
基金the support of the project(SP2017/22)which is the base of this articlepartially supported by the Slovak Research and Development Agency under contract No.APVV-0129-12the Scientific Grant Agency of the Ministry of Education,Science,Research and Sport of the Slovak Republic and the Slovak Academy of Sciences(VEGA)within the project No.1/0559/17 and APVV 1/0462/16。
文摘This article presents a research study of complex limestone karst engineering-geological conditions in the municipality Valaskanear Banska Bystrica in Slovakia.The aim of the study is to demonstrate the impossibility of spatial identification of cave spaces using surface geophysical methods due to the specific engineering-geological conditions of a thick surface layer of anthropogenic fill containing highly heterogeneous anthropogenic material.Its maximum thickness is 3 m.Another specificific condition of the study area is its location in the built-up area,due to which the applicability of geophysical methods was limited.The article contains methodological recommendations to be used in analogous geological conditions with karst structures topped with anthropogenic fill,which complicates the identification of cave spaces.The recommended solution herein is the identification of the cave system using underground mapping of the karst and its projection onto the surface for which surface geophysical methods have been combined.
文摘A magnetotelluric study was carried out in the Xuefeng mountain uplift belt and its western margins. A detailed investigation was made of the resistivity of the formations, and reliable data were obtained. The sedimentary cover and basement structure of the Xuefeng mountain area and the deep geological structure were analyzed in detail using magnetotelluric data from the twodimensional inversion of the resistivity profile data in combination with regional gravity and magnetic data. It was concluded that the tectonic movements were characterized by basement detachment, and north-south ramp.The study area can be divided into a southern uplift zone, a southern thrust-faulted zone, a central uplift zone, and a northern depression zone. This work has provided geophysical evidence that can be used in future studies of the tectonics and petroleum geology of this region.
文摘露天矿山边坡矿体内部存在裂隙、节理等岩体结构,对边坡稳定性产生直接或间接的影响。而单一的物探技术只能获取地质结构某一方面的信息,在地质勘探方面存在局限性。为确保边坡稳定,设计一种综合物探技术下露天矿山边坡地质勘测方法。以地下介质电阻率、密度等地球物理特征为依据,融合瞬变电磁法、高密度电法、地震映像法作为综合物探手段,在Geogiga Front End Free软件工具上,形成地震映像图和视电阻率截面图。根据所得勘测结果显示,通过地震映像法能准确描述出地质形态、地层结构和厚度,高密度电法能够清晰展示出边坡区域下浅层塌陷部分的空间范围及低阻特性明显的填充物,瞬变电磁法能够准确地对超过百米深的地层中的异常体做出响应,证明综合物探技术具有良好的勘探能力。