دورية أكاديمية

Calculating the cohesion and internal friction angle of volcanic rocks and rock masses

التفاصيل البيبلوغرافية
العنوان: Calculating the cohesion and internal friction angle of volcanic rocks and rock masses
المؤلفون: Marlène C. Villeneuve, Michael J. Heap
المصدر: Volcanica, Vol 4, Iss 2, Pp 279-293 (2021)
بيانات النشر: Volcanica, 2021.
سنة النشر: 2021
المجموعة: LCC:Geology
مصطلحات موضوعية: mohr-coulomb, hoek-brown, porosity, strength, failure criteria, Geology, QE1-996.5
الوصف: Rock failure criteria are key input parameters for models designed to better understand the stability of volcanic rock masses. Cohesion and friction angle are the two defining material variables for the Mohr-Coulomb failure criterion. Although these can be determined from laboratory deformation experiments, they are rarely reported. Tabulated data for volcanic rocks, calculated using published triaxial results, show that cohesion and friction angle decrease with increasing porosity. If porosity is known, these empirical fits can provide laboratory-scale cohesion and friction angle estimations. We present a method to upscale these parameters using the generalised Hoek-Brown failure criterion, discuss the considerations and assumptions associated with the upscaling, and provide recommendations for potential end-users. A spreadsheet is provided so that modellers can (1) estimate cohesion and friction angle and (2) upscale these values for use in large-scale volcano modelling. Better constrained input parameters will increase the accuracy of large-scale volcano stability models.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2610-3540
Relation: https://www.jvolcanica.org/ojs/index.php/volcanica/article/view/134; https://doaj.org/toc/2610-3540
DOI: 10.30909/vol.04.02.279293
URL الوصول: https://doaj.org/article/c69f2dc57f5d4d3aad460cdee7d78556
رقم الأكسشن: edsdoj.69f2dc57f5d4d3aad460cdee7d78556
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:26103540
DOI:10.30909/vol.04.02.279293