Groundwater flow in sedimentary rock saprolite, and in soils derived from this material, is strongly influenced by sedimentary layering and fractures inherited from the parent bedrock. The main objectives of this study were to determine whether parent bedrock lithology and infilling of fractures and other macropores with pedogenically derived clays and Fe/Mn oxides also play major roles in cont...

A floor rock roadway under an oblique straddle working face is a typical dynamic pressure roadway. Under the complex disturbance of excavation engineering works, often undergoes stress concentration and severe deformation damage. To solve problem surrounding stability control for this type, study considered East Forth main transport in strata 1762(3) Pansan coal mine. In situ ground monitoring ...

With the increase of mined-out areas and geological disasters, it is necessary to study influence range mining. Moreover, with growth in amount data, machine learning methods are commonly used predict surface subsidence. The 10 mm subsidence boundary an important indicator determine range, FLAC3D suitable for solving nonlinear large deformation problems. Therefore, can be explore relationship b...

We analyzed the characteristics of red soils that are often considered collapsible soils. In this study, we examined depositional environment and lithologic characteristics, stratigraphy, conducted mechanical sieve, X-ray fluorescence, X-Ray diffraction, scanning electron microscope, fluorescence analyses optically stimulated luminescence dating. The samples were collected from gravel pits to e...

[1] The geologic origin of the Medusae Fossae Formation (MFF) has remained a mystery despite three decades of research. To better constrain its formation, an in-depth analysis of observations made in the literature was combined with a new survey of over 700 Mars Orbiter Camera narrow-angle images of the MFF to identify morphologic characteristics and material properties that define this formati...

In the relatively pristine ecosystem in Kejimkujik Park, Nova Scotia, methylmercury (MeHg) concentrations in loons, Gavia immer, are among the highest recorded anywhere in the world. This study investigated the influence of bedrock lithology on MeHg concentrations in wetlands. Twenty-five different wetland field sites were sampled over four different bedrock lithologies; Kejimkujik monzogranite...

Longwall backfill mining effectively mitigates the height of water-conductive fractured zone (HWCFZ), preventing it from reaching overlying aquifer and thus preserving groundwater. However, has disadvantages insufficient filling time space as well mutual constraints between mining. A novel continuous extraction partial (CEPB) water-preserving method was therefore proposed. The analytic hierarch...

the prediction of lithology is necessary in all areas of petroleum engineering. this means that todesign a project in any branch of petroleum engineering, the lithology must be well known. supportvector machines (svm’s) use an analytical approach to classification based on statistical learningtheory, the principles of structural risk minimization, and empirical risk minimization. in thisresearc...

The outstanding geosites in Satun UNESCO Global Geopark, Thailand are mainly karst topography. Sinkhole which is originated from the dissolution of rocks by groundwater or acidic rainwater one potential natural disasters these geosites. To gain confident among geotourism, detecting features, cavities and surficial crucial risk assessment sustainable geopark management. As a part geohazard asses...

Offshore Zhoushan sediments are a potential area for shallow gas resources in China, where authigenic pyrite is widely distributed. Pyrite content, size distribution, and morphology influenced by depositional conditions sensitive to environmental changes. This study investigated the pyrites or gypsums of core JC-1 offshore Zhoushan. Scanning electron microscopy was used observe identify various...