کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
809361 1468703 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel and versatile apparatus for brittle rock deformation
ترجمه فارسی عنوان
دستگاه رمان و همه کاره برای تغییر شکل سنگ شکننده
کلمات کلیدی
دستگاه دو طرفه، مخازن تحت فشار، اصطکاک
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• A novel biaxial rock deformation apparatus within a pressure vessel.
• Large pressure vessel (internal diameter of 40 cm) and 6 main access ports for electronics, pore fluids and confining oil.
• Horizontal and vertical forces up to 1.5 MN, maximum confining pressure 75 MPa, 8 L of fluids can be pressurized up to 30 MPa.

This paper describes a new biaxial rock deformation apparatus within a pressure vessel, consisting of a stainless steel vessel with an internal diameter of 40 cm and six main access ports for electronics (~100 pins), pore fluids (three lines), and confining oil. The apparatus has to ability to work on large rock samples, up to 20×20 cm2, with horizontal and vertical forces up to 1.5 MN. The maximum confining pressure of the vessel is 70 MPa, and fluid flow properties and permeability of large-samples can be tested using up to 8 L of fluids that can be pressurized up to 30 MPa. Sliding velocity during experiments is in the range 0.1 m/s – 1.0 cm/s. The machine stiffness is 0.91 kN/μm and 1.3 kN/μm for the vertical and horizontal axes, respectively. Measurements on friction, velocity dependence of friction and healing properties of reference material like granite and talc replicate the values presented in the literature. Triaxial stress state tests with controlled confining and pore fluid pressure, and fluid flow through the samples have been performed successfully. The machine is extremely versatile, as it works as a uniaxial, triaxial or true-triaxial apparatus, on rock samples with dimensions ranging from several to tens of centimetres. Due to the broad number of potential operating conditions, we decided to name the machine BRAVA: Brittle Rock deformAtion Versatile Apparatus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Rock Mechanics and Mining Sciences - Volume 66, February 2014, Pages 114–123
نویسندگان
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