Relation Between Haul Road and Damage of Off-highway Dump Trucks PDF Download
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Author: Satoki Kondo
Publisher:
ISBN:
Category : Dump trucks
Languages : en
Pages : 8
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Author: Satoki Kondo
Publisher:
ISBN:
Category : Dump trucks
Languages : en
Pages : 8
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Book Description
Author: Roger Thompson
Publisher: CRC Press
ISBN: 0429958013
Category : Technology & Engineering
Languages : en
Pages : 294
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Book Description
Mining haul roads are a critical component of surface mining infrastructure and the performance of these roads has a direct impact on operational efficiency, costs and safety. A significant proportion of a mine’s cost is associated with material haulage and well-designed and managed roads contribute directly to reductions in cycle times, fuel burn, tyre costs and overall cost per tonne hauled and critically, underpin a safe transport system. The first comprehensive treatise on mining haul road design, construction, operation and management, Mining Haul Roads – Theory and Practice presents an authoritative compendium of worldwide experience and state-of-the-art practices developed and applied over the last 25 years by the three authors, over three continents and many of the world’s leading surface mining operations. In this book, the authors: Introduce the four design components of an integrated design methodology for mining haul roads – geometric (including drainage), structural, functional and maintenance management Illustrate how mine planning constraints inform road design requirements Develop the analytical framework for each of the design components from their theoretical basis, and using typical mine-site applications, illustrate how site-specific design guidelines are developed, together with their practical implementation Summarise the key road safety and geometric design considerations specific to mining haul roads Specify the mechanistic structural design approach unique to ultra-heavy wheel loading associated with OTR mine trucks Describe the selection, application and management of the road wearing course material, together with its rehabilitation, including the use of palliatives Develop road and operating cost models for estimating total road-user costs, based on road rolling resistance measurement and modelling techniques Illustrate the approach of costing a mining road construction project based on the design methodologies previously introduced List and describe future trends in mine haulage system development, how mining haul road design will evolve to meet these new system challenges and how the increasing availability of data is used to manage road performance and ultimately provide 24x7 trafficability. Mining Haul Roads – Theory and Practice is a complete practical reference for mining operations, contractors and mine planners alike, as well as civil engineering practitioners and consulting engineers. It will also be invaluable in other fields of transportation infrastructure provision and for those seeking to learn and apply the state-of-the-art in mining haul roads. “This book is the most definitive treatise on mining haul roads ever written [...] There has never been a text that addresses the many facets of mining haul roads on such a scope [...]” From the Foreword by Jim Humphrey, Professional Engineer, Autonomous haulage systems developer and Distinguished Member of the Society of Mining, Metallurgy and Exploration.
Author: Tad.S. Golosinski
Publisher: Routledge
ISBN: 1351427091
Category : Technology & Engineering
Languages : en
Pages : 415
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Book Description
First published in 1989. This volume includes papers of an International Symposium on "Off-Highway Haulage in Surface Mines" held in Edmonton, Canada, May 1989. They take up truck dispatch, fleet management, equipment, operations and safety, and haulroads.
Author: Graeme E. Hancock
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 310
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Author:
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 88
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Author: Nicholas Papavizas
Publisher:
ISBN:
Category :
Languages : en
Pages :
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In this research, a three-degree-of-freedom (3-DOF) mathematical model is developed to predict the onset of unstable pitch/bounce-type vibrations in heavy, off-highway, mining haul trucks. This unstable vibration phenomenon can be described as an instance of power hop, a type of dynamic instability also seen in agricultural tractors, wheeled construction vehicles, and other off-highway vehicles (OHVs). A model that can adequately predict dynamic instability is a necessary first step in developing controls solutions that might be able to mitigate or even prevent unstable motion from occurring.The 3-DOF model describes a rear-wheel-drive (RWD) mining haul truck operating on a non-deformable, sloped surface. Analytical stability criteria are derived through closed-form eigenvalue analysis of the equations of motion while neglecting all damping terms. Numerical stability analysis studies parameter sensitivity for a representative haul truck with a 250 ton payload capacity in two payload scenarios: operation at empty vehicle weight (EVW) and operation at 100% payload capacity, or gross vehicle weight (GVW).Results show that the 3-DOF predicts dynamic instability. By utilizing a stability margin, the results further show that there are numerous different operating point configurations that could potentially lead to dynamic instability. Of the 33 million cases tested in each of the two different payload scenarios, 21% are deemed potentially unstable for the empty truck and 38% are deemed potentially unstable for the loaded truck. Furthermore, potentially unstable cases exist over the full range of parameters simulated. The analytical stability criteria derived from the undamped equations of motion do not always correlate with the numerical eigenvalue analysis of the full set of equations of motion that include all damping terms.Instability is shown to be heavily dependent on road grade, tire stiffness and damping properties, the location of the vehicles center of gravity, and forward travel speed. The model mainly predicts instability on severe road grades and at high speeds. A result not seen in previous studies of power hop in agricultural tractors is the prediction of dynamic instability when a vehicle travels downhill. While instability on uphill grades primarily occurs when the rear axle is stiffer than the front axle, the opposite is observed on downhill grades. Increased tire damping is shown to reduce the likelihood of instability in both loading scenarios and on all grades. Like tire stiffness, longitudinal center of gravity location also plays a role in whether the truck is more likely to become unstable on positive or negative road grades.
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1448
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Author: South African Institute of Mining and Metallurgy
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 556
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Author:
Publisher:
ISBN:
Category : All terrain vehicles
Languages : en
Pages : 208
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Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1080
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Book Description
