کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4691298 1636722 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiscale geophysical characterization of an unstable rock mass
ترجمه فارسی عنوان
خصوصیات ژئوفیزیکی چندمتغیره از یک توده سنگ ناپایدار
کلمات کلیدی
جرم سنگ نامنظم، توموگرافی لرزهای متقاطع سوراخ، سرعت پالس اولتراسونیک، مشخصات فیزیکی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Internal characterization of unstable rock mass through geophysical (seismic) methods
• Cross-hole seismic tomography for imaging contrasts in the seismic velocity field
• Ultrasonic velocity and physico-mechanical measurements for multiscale correlations
• Multiscale approach to cross-confirm data and highlight predisponent factors

Hazard mitigation from rockfalls and landslides is a priority in densely populated areas. A proper characterization of the inner structure of the rock mass is key to the comprehension of the mechanisms enhancing the slope instabilities. To this aim multi-scale geophysical methods can provide a novel and valuable tool for a high-resolution imaging of the internal structure of the rock mass and unique constraints on the physical state of the medium. We present here a cross-hole seismic tomography survey coupled with laboratory ultrasonic velocity measurements and physical properties determination on rock samples to characterize the damaged and potentially unstable granitic cliff of Madonna del Sasso (NW Italy).Results allowed to obtain: i) a lithological interpretation of the velocity field obtained at the site, ii) a systematic correlation of the measured velocities with physical properties (density and porosity) and macroscopic features of the granite (weathering and anisotropy) of the cliff. The multi-scale approach adopted within this study revealed to be crucial for the imaging at depth of the main fractures affecting the cliff (site-scale seismic tests) and for the understanding of the variations in the seismic velocity between altered and intact rock (laboratory-scale tests); similar approaches can be potentially used in further microseismic monitoring studies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 675, 22 April 2016, Pages 275–289
نویسندگان
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