کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8914377 | 1640466 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the structural anisotropy of physical and mechanical properties of a Bunter Sandstone
ترجمه فارسی عنوان
در مورد بی نظمی ساختاری خواص فیزیکی و مکانیکی ماسه سنگ بونتر
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کلمات کلیدی
سنگهای آنیزوتروپیک، ماسه سنگ باندر، آزمایش سه تایی، رفتار مکانیکی، الگوی شکستگی، معیار شکست شکست موری کولون،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
Studies of structural anisotropy of rocks contribute to the understanding of their mechanical behaviour variation in a broad spectrum of geological settings. In this work we characterise the lithological variation and the mechanical behaviour of the Trendelburg beds, a fine-grained subarkose from the Bunter Sandstone, with moderate effective porosity (10%) and low permeability (0.5 mD). Traditional triaxial compression tests were carried out with varying confining- and pore pressures in water saturated specimens (7â¯cm diameter Ã14â¯cm length). Ultrasonic velocity, permeability, deformability, compressive strength, mechanical work and fracture pattern were determined in two directions of anisotropy (0° and 90°) with respect to bedding. Changing the angle of anisotropy leads to different reactions to the influence of lithological heterogeneities, which reaches a maximum when arranged parallel to Ï1. The Trendelburg beds has significant anisotropy effects, which tend to increase with effective pressure. The effects of a structural anisotropy due to bedding are associated with an anisotropy of physical properties, stress state, pore pressure and likely pore space distribution. Mechanical properties are direction dependent, however, the influence of lithological factors may diverge between both directions of anisotropy as pressure increases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 114, September 2018, Pages 196-205
Journal: Journal of Structural Geology - Volume 114, September 2018, Pages 196-205
نویسندگان
Flora Feitosa Menezes, Christof Lempp,