Results 221 to 230 of about 4,014 (247)
Some of the next articles are maybe not open access.
Muon absorption imaging for the density structure of metro tunnel overburden
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentZhentao Yang, Zhiwei Li
exaly +2 more sources
Structural Modification of Fine Powders of Overburden Rocks of Saponite-Containing Bentonite Clay
Inorganic Materials: Applied Research, 2023The kinetic regularities of the process of structural modification of highly dispersed powders of saponite-containing material after mechanical dispersion have been studied. As information criteria characterizing the restructuring of the crystal lattice of minerals, changes are used that occur with the specific surface of powders at different grinding ...
A. M. Ayzenshtadt +4 more
openaire +1 more source
Image-guided tomography: structure conforming inversion for complex overburden
First Break, 2014Guy Hilburn, Yang He, Francis Sherrill, Taejong Kim and Zengjia Yan present a highresolution tomography method which flattens gathers reliably and quickly, while yielding geologically plausible velocity models. Traditional methods of updating velocity models by seismic tomography rely on a number of assumptions and simplifications.
Guy Hilburn +4 more
openaire +1 more source
Structural motion of water-resisting key strata lying on overburden
Journal of China University of Mining and Technology, 2008Abstract Water-preserved mining is one of the important parts of the 'Green Mining' technological system. The purpose of water-preserved mining is to prevent water from bursting out in coal mines and thus to protect water resources. The principle of water-resisting key strata (WKS) is proposed to establish a model capable of guiding and developing ...
Hai PU +3 more
openaire +1 more source
Structure and deformation measurements of shallow overburden during top coal caving longwall mining
International Journal of Mining Science and Technology, 2017 Mining induced pressures are strong and overburden failure areas are large in top coal caving longwall mining, which constrains high production and safety mining. By employing the combination of the full view borehole photography technique and the seismic CT scanner technique, the deformation and failure of overlying strata of fully mechanized caving ...
Chaojun Fan +2 more
exaly +3 more sources
The limitations of 1‐D AEM inversion for 2‐D overburden structures
SEG Technical Program Expanded Abstracts 1998, 1998Successful exploration with airborne electromagnetic (AEM) methods depends to a large extent on effective methods for the quantitative interpretation of anomalies caused by variations in the conductivity and thickness of the overburden. Interpretation of AEM data is commonly via one-dimensional (1-D) inversion or the conductivitydepth imaging (CDI ...
Xiaoli Xie, James Macnae, James Reid
openaire +1 more source
Engineering Structures, 2020
Abstract Underground structures such as subway stations, which are operated at a high capacity and frequency, are prone to damage by large earthquakes. To study the seismic performance of underground structures, this paper presents a three-dimensional nonlinear finite element simulation of the seismic behavior of subway stations, considering the ...
Qingjun Chen
exaly +2 more sources
Abstract Underground structures such as subway stations, which are operated at a high capacity and frequency, are prone to damage by large earthquakes. To study the seismic performance of underground structures, this paper presents a three-dimensional nonlinear finite element simulation of the seismic behavior of subway stations, considering the ...
Qingjun Chen
exaly +2 more sources
Reasonable Overburden Depth Analysis of Close-Frame Structure in Airport Project
Applied Mechanics and Materials, 2014The close-frame is the main structure type of underground passage in airport project. Its characteristics are long route, multi-zone crossing, heavy load capacity. The suitable thickness of covering soil is advantageous to structure. Therefore, it has important engineering significance in guiding structural design and to determine the optimal route ...
Qi Jie Teng, Song Hua Wu, Liang Zhang
openaire +1 more source
Effect of Overburden Thickness on the Copper Microstructure of Dual-Inlaid Interconnect Structures
AIP Conference Proceedings, 2006Dual‐inlaid Cu interconnects with different overburden thicknesses were fabricated and subsequently annealed applying identical conditions. The microstructure in trenches was characterized by electron backscatter diffraction (EBSD) before and after chemical mechanical polishing (CMP). For samples subjected to CMP, grain size and texture were determined
openaire +1 more source
Utilization of overburden quaternary rocks to create soil cushions for structures
The article presents data on scientific and technical support of the construction of an embankment with an area of 1.9 million m2 and a thickness of 4-6 m for the facilities of an electrometallurgical plant in the city of Horishni Plavni, Poltava region of Ukraine. The paper presents the results of comprehensive laboratory and field studies of physicalYuriy Vynnykov +4 more
openaire +1 more source