Results 31 to 40 of about 22,157 (282)
Absolutely trianalytic tori in the generalized Kummer variety [PDF]
, 2015 We prove that a generic complex deformation of a generalized Kummer variety contains no complex analytic tori.Comment: 14 pages. Some changes after comments.
Kurnosov, Nikon
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Numerical Investigation on Stratum and Surface Deformation in Underground Phosphorite Mining Under Different Mining Methods [PDF]
Frontiers in Earth Science, 2022 With the ending of deep-concave open-pit phosphorite extractions and gradual exhausting of shallow mineral resources, stoping of phosphorite seams has entered or will enter into underground mining. Particularly for excavating slightly inclined thin and medium-thick phosphorite orebodies, roof and surface control under different mining methods is ...
Xiaoshuang Li +5 more
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Deformation characteristics and mechanism of deep subsize coal pillar of the tilted stratum [PDF]
Energy Science & Engineering, 2019 AbstractBased on the analysis of the monitoring data of surface displacement and internal multipoint displacement of coal pillars near three inclined strata roadways, which have similar burial depth and different surrounding rock conditions in a coal mine in the east China, the coal pillars’ stress change was combined with discontinuous numerical ...
Hai Wu +4 more
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Deformation Characteristic of a Supported Deep Excavation System: A Case Study in Red Sandstone Stratum [PDF]
Applied Sciences, 2021 A complete case record of a deep foundation pit with pile-anchor retaining structure excavated in red sandstone stratum is presented in this study. The horizontal displacement of pile top, the horizontal displacement at various depths, the axial force of anchor cable, and ground settlement during construction are measured. A three-dimensional numerical
Weizheng Liu, Tianxiong Li, Jiale Wan
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Ground Deformation of Shield Tunneling through Composite Strata in Coastal Areas
BuildingsIn order to mitigate ground deformation during shield construction in both upper soft and lower hard strata of coastal areas, a numerical simulation was executed.
Xiong Wu +8 more
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Journal of MMIJ, 2018 Depressurization process is regarded as the most effective process for gas recovery method from the viewpoints of gas productivity and economic efficiency among in-situ dissociation processes of Methane Hydrate (MH) existing in marine sediments. However,
Masayo KAKUMOTO +7 more
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Nash Problem for quotient surface singularities [PDF]
, 2010 We give an affirmative answer to Nash Problem for quotient surface singularities, in particular for the icosahedral singularity $E_8$.Comment: 25 pages with 5 figures.
Pereira, Maria Pe
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Deformation Monitoring and Stability Analysis of Shaft Lining in Weakly Cemented Stratum
Advances in Civil Engineering, 2018 Shaft linings in thick weakly cemented stratum have the disadvantages of large deformation and repeated damage after repair. Considering the typical geologic characteristics and the failure characteristics of shaft linings, we establish a multilayer automatic deformation monitoring system in this paper, and the monitoring system can realize the real ...
Xianzhou Lyu, Weiming Wang
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A note on monopole moduli spaces [PDF]
, 2003 We discuss the structure of the framed moduli space of Bogomolny monopoles for arbitrary symmetry breaking and extend the definition of its stratification to the case of arbitrary compact Lie groups.
Bernstein I. N. +17 more
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Effect of Cobble Content on the Shear Behaviour of Sand-Cobble Mixtures
Advances in Civil Engineering, 2021 The sand and cobble stratum is a kind of mechanically unstable stratum. Shield machine often encounter problems such as difficulty in excavation, cutterhead wear, and poor slag discharge of the spiral dumper while constructing in this kind of stratum ...
Chuang Wang +4 more
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