Hassan Sarfaraz
School of Mining, College of Engineering, University of Tehran
[ 1 ] - A Numerical Analysis on the Performance of Counterweight Balance on the Stability of Undercut Slopes
One of the important parameters in undercut slopes design is the determination of the maximum stable undercut span. The maximum stable undercut span is a function of slope geometry, the strength parameters of the slope material, condition of discontinuities, underground water condition, etc. However, the desired production capacity and therefore the size of excavating equipment will sometimes a...
[ 2 ] - بررسی مکانیزم شکست دیسک‌های شبه سنگی حفره‌دار در آزمون برزیلی
بررسی و شناخت رفتار تغییر شکل نمونه‌های سنگ ترد در طول بارگذاری و تاثیر آن در مکانیزم آسیب و توسعه آن حایز اهمیت است. روش‌های مختلفی برای رفتارنگاری آسیب و شکست مصالح ارایه و بسط داده شده است. از بین آن‌ها، روش انتشار آوایی به علت داشتن ویژگی‌های منحصربه‌فرد و توانایی رفتارنگاری جامع در سال‌های اخیر مورد توجه پژوهشگران قرار گرفته است. در این تحقیق، مکانیزم شکست نمونه‌های شبه‌سنگی حفره‌دار با ا...
[ 3 ] - Numerical analysis of slide-head-toppling failure
In layered and blocky rock slopes, toppling failure is a common mode of instability that may occur in mining engineering. If this type of slope failure occurs as a consequence of another type of failure, it is referred to as the secondary toppling failure. “Slide-head-toppling” is a type of secondary toppling failures, where the upper part of the slope is toppled as a consequence of a semi-circ...
[ 4 ] - Numerical Modeling of Rock Slopes with a Potential of Block-Flexural Toppling Failure
One of the most important instabilities of rock slopes is toppling failure. Among the types of toppling failure, block-flexural failures are more common instability which occurs in nature. In this failure, some rock blocks break because of tensile stresses, and some overturn under their weights, and next to all of them topple together. Physical and theoretical modeling of this failure is studie...
[ 5 ] - Stability analysis of block-flexural toppling of rock blocks with round edges
One of the most conventional toppling instabilities is the block-flexural toppling failure that occurs in civil and mining engineering projects. In this kind of failure, some rock columns are broken due to tensile bending stresses, and the others are overturned due to their weights, and finally, all of the blocks topple together. A specific feature of spheroidal weathering is the rounding of th...
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