Results 91 to 100 of about 2,793,105 (151)

Research on quantitative prediction method of structural fractures in metamorphic rock reservoirs

Scientific Reports
Deeply buried hill reservoirs have experienced tectonic movement during different periods, and tectonic fractures are well developed in metamorphic reservoirs, making quantitative characterization and spatial distribution prediction of fractures more ...
Qinghong Yang, Qi Cheng, Guanjie Zhang, Xinwu Liao, Ning Shi, Lei Zhang, Xiang Wang, Wenchao Liu, Jingshou Liu   +8 more
doaj   +1 more source

Multiple Linear Regression Inversion of the Ground Stress Field in Rock Masses for Tunnel Engineering: A Novel Approach to Stress Field Reconstruction

Buildings
The inversion of the ground stress field in rock masses is critical for accurate tunnel and underground engineering design. This study addresses the challenge of accurately capturing both the primary and secondary stress field components in rock masses ...
Wei Meng, Hongyang Zhou, Chun Luo, Shuai Qin, Xuefu Zhang, Binke Chen   +5 more
doaj   +1 more source

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Tectonic stresses in the lithosphere

Tectonics, 1983
Various types of observables (earthquake focal mechanisms, in situ measurements and geological deformations) give information about the large scale lithospheric stress field. The latter has often been explained by postulating appropriate forces acting at the edges and beneath the plates. This approach ignores the role of mass heterogeneities within the
Luce Fleitout, Claude Froidevaux
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Tectonic stress in the plates

Reviews of Geophysics, 1979
The state of stress in the lithosphere provides strong constraints on the forces acting on the plates. The directions of principal stresses in the plates as indicated by midplate earthquake mechanisms, in situ stress measurements, and stress‐sensitive geological features are used to test plate tectonic driving force models, under the premises that ...
Randall M. Richardson, Sean C. Solomon, Norman H. Sleep   +2 more
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Apparent stress and stress drop for intraplate earthquakes and tectonic stress in the plates

pure and applied geophysics, 1977
The magnitude of shear stress in the lithosphere is bounded from below by the apparent stress and stress drop during intraplate earthquakes. Apparent stresses and stress drops for a number of mid-plate earthquakes are calculated from the earthquake magnitude, SH wave amplitude spectra, and estimates of the length of the fault zone.
Randall M. Richardson, Sean C. Solomon
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Tectonic Stresses in France

1980
A flat jack method has been used to determine the principal stress axes in the Jurassic limestone of the basin of Paris and in neighbouring regions. The results have been compared with a few overcoring measurements in boreholes of a few meters.
C. Paquin, C. Froidevaux
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The origin of tectonic stress in the lithosphere

Tectonophysics, 1984
Abstract The sources of lithospheric stress and their distinctive features are briefly reviewed. It is suggested that there are two main categories of lithospheric stress: renewable stress which persists despite continuing stress relaxation and non-renewable stress which can be dissipated by relief of the initial strain.
M.H.P. Bott, N.J. Kusznir
openaire   +1 more source

Exploration of numerical simulation on paleo-tectonic stress field [PDF]

Procedia Earth and Planetary Science, 2009
This paper analyzed the numerical simulation method of Paleo-tectonic stress field from three aspects: tectonic simulation target, establishment of the tectonic model, and tectonic modeling.
Chun-mei, Zhou, Xian-fu, Li, Sheng-wei, Wang, Ze-jun, Zhang   +3 more
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Global patterns of tectonic stress

Nature, 1989
Regional patterns of present-day tectonic stress can be used to evaluate the forces acting on the lithosphere and to investigate intraplate seismicity. Most intraplate regions are characterized by a compressional stress regime; extension is limited almost entirely to thermally uplifted regions.
Zoback, Mary Lou, Zoback, Mark D., Adams, J., Assumpção, M., Bell, S., Bergman, E. A., Blümling, P., Brereton, N. R., Denham, D., Ding, J., Fuchs, K., Gay, N., Gregersen, S., Gupta, H. K., Gvishiani, A., Jacob, K., Klein, R., Knoll, P., Magee, M., Mercier, J. L., Müller, B. C., Paquin, C., Rajendran, K., Stephansson, O., Suarez, G., Suter, M., Udias, A., Xu, Z. H., Zhizhin, M.   +28 more
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Central Europe: Active or Residual Tectonic Stresses

pure and applied geophysics, 1977
The regional stress field in the Western Alps and their northern foreland has been investigated by in situ stress determinations. More than 600 strain relief measurements were made with resistance strain gages in boreholes carried out in mines, tunnels and quarries. The stresses calculated and data obtained from other papers were used to get a detailed
Gerhard Greiner, J. Henning Illies
openaire   +1 more source