Effects of weathering depth and thickness on rock failure:Experimental approach and particle flow code simulation
作者机构：Mining Engineering DepartmentHamedan University of TechnologyHamedan57965155Iran Department of GeologyYazd UniversityYazd***Iran Montanuniversitat LeobenFranz Josef Straße 18Leoben8700Austria
出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)
年 卷 期：2024年第16卷第11期
页 面：4638-4653页
核心收录：
学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学]
主 题：Limestone Weathering depth Weathering thickness Failure pattern Particle flow code in two dimensions(PFC2D)
摘 要：This study investigated the effects of weathering depth and thickness on the failure mechanisms of rock samples through experimental and numerical *** first configuration involved conducting artificial weathering on limestone using the freezing and thawing(F-T)for 40 *** mechanical parameters of the samples were measured at the end of the 40th *** the second configuration,a series of specimens underwent salt crystallization(S-C)tests for 20 *** results were validated using discrete element method(DEM).Next,the weathered limestone model with dimensions of 108 mm54 mm were *** weathering layers were tested at four different thicknesses(i.e.2.5 mm,5 mm,7.5 mm,and 10 mm)and three different positions(at the surface,5 mm under the rock surface,and 10 mm under the rock surface).According to the results,weathering depth and thickness have a considerable effect on the failure *** results also showed a correlation between the values of compressive strength and failure mechanisms associated with the weathering *** numerical results revealed that the tension crack was the dominant ***,with increasing weathering thickness,Young s modulus,crack initiation stress,and final strength decreased in constant weathering *** results also demonstrated that the failure progress of the numerical models was similar to that observed in the laboratory.
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