حسین میرزائی نصیرآباد
هیات علمی دانشکده معدن، نفت و ژئوفیزیک/ دانشگاه صنعتی شاهرود
[ 1 ] - مطالعه آزمایشگاهی تاثیر آرایش ترک ها در رفتار شکست نمونه های شبه سنگی تحت بارگذاری فشاری تک محوری
در اثر بارگذاری، ترک های موجود در محیط سنگی رشد کرده و به هم متصل می شوند و در نهایت منجر به شکست آن می گردند. در این مقاله مکانیسم رشد و اتصال ترک ها در نمونه های شبه سنگی حاوی دو ترک شیب دار و باز تحت بارگذاری فشاری تک محوری به طور آزمایشگاهی مطالعه شده است. نمونه های آزمایشگاهی با استفاده از ترکیب گچ و آب تهیه شده و ترک ها با قرار دادن صفحات نازک در قالب ایجاد شده اند. یک سری نمونه حاوی دو ت...
[ 2 ] - Development of a goal programming model for optimization of truck allocation in open pit mines
Truck and shovel operations comprise approximately 60% of the total operating costs in open pit mines. In order to increase productivity and reduce the cost of mining operations, it is essential to manage the equipment used with high efficiency. In this work, the chance-constrained goal programing (CCGP) model presented by Michalakopoulos and Panagiotou is developed to determine an optimal truc...
[ 3 ] - Artificial neural network to predict the health risk caused by whole body vibration of mining trucks
Drivers of mining trucks are exposed to whole-body vibrations (WBV) and shocks during the various working cycles. These exposures have an adversely influence on the health, c...
[ 4 ] - Numerical Modelling of Backfill Grouting Approaches in EPB Tunneling
One of the main issues involved during tunnel construction with tunnel boring machines is the tail gap grouting. This gap is between the external diameter of tunnel lining and the excavation boundary that is filled with high-pressure grouting materials. In this work, three different approaches of gap grouting modeling in the FLAC3D software are investigated with a special attention to the...
[ 5 ] - A 3D Finite-Difference Analysis of Interaction between a Newly-Driven Large Tunnel with Twin Tunnels in Urban Areas
Evaluation of the interaction between a new and the existing underground structures is one of the important problems in urban tunneling. In this work, using FLAC3D, four numerical models of single- and twin-tube tunnels in urban areas are developed, where the horizontal distance between the single- and twin-tube tunnels are varied. The aim is to analyze the effects of the horizontal dista...
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