Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Haulage"”.
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Optimization Models for Inland Haulage Transportation of Containers
… There are many parties (shipping lines, haulage companies, customers) sharing this operation as well as many restrictions that increase the complexity of this problem and make it NP-hard. Shipping lines and haulage companies tend to apply efficient optimization techniques to manage this …
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Autonomous Prototype of a Full Dimension Continuous Haulage System
… scale prototype of a Full Dimension Continuous Haulage System manufactured by the Long-Airdox Company. The prototype, which will allow development and testing of path-planning and control algorithms for autonomous navigation and operation in underground coal mines, has been completed. The …
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Functional safety fault tree analysis of a model autonomous haulage system
Autonomous Haulage Systems (AHS) in mining began trials in the 1990’s but have only become widely accepted in the last five years. Mine operators with AHS deployments are reporting greater than 20% increases in utilization of trucks and reductions of hourly operating costs as compared to manned …
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Applications of Queuing Theory for Open-Pit Truck/Shovel Haulage Systems
… for more than 60% of all surface output. Haulage costs account for as much as 60% of the total operating cost for these types of mines, so it is desirable to maintain an efficient haulage system. As the size of the haulage fleet being used increases, shovel productivity increases and truck …
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Design of Control Algorithms for Automation of a Full Dimension Continuouis Haulage System
… for a Long-Airdox Full Dimension Continuous Haulage system will be the main focus. Automation is a highly complex task, which aims at achieving increased levels of equipment efficiency by eliminating errors that arise due to human interference. Achieving a fully autonomous operation of a …
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The disposal of lime waste at the Dupont Waynesboro, Virginia plant
… of the slurry by draining in lime ponds for farm haulage, by drying with flue gases or by dumping it in the nearby South River. It was found feasible to dry the slurry for agricultural uses by adding burnt lime and to prepare insecticides such as lime-sulfur and calcium arsenate, the market for …
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Development of an Underground Automated Thin-Seam Coal Mining Method
… address the integration of mining and continuous haulage systems are also investigated. That background is employed in devising a conceptual mining system for the underground mining of coal seams in the 14 to 28 inch range of thickness. This thesis proves that adapting new technologies and …
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Encumbered space and its effect on mine transportation
… of velocity-clearance curves for several haulage media are derived, noting the vital need for future research. The basic assumption that production is proportional to the product of capacity and velocity is utilized and the concept of derating the maximum theoretical production rate of an …
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A modern mining operation for the Virginia semianthracite coal field
… of hoisting, mining methods, ventilation, haulage and drainage, and power are taken up separately and a solution recommended for each problem. To operate the mine an organization is designed to fit the solution of the various problems. The estimate of the cost of equipping and providing the …
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Models to predict dynamic response of motorcycles with a outrigger & trailer
… for heavier duty operations like road haulage and agricultural mechanization. This thesis examines the feasibility of using motorcycles for low-speed high-weight towing and outrigger like attachments. Two different configurations will be evaluated. The first looks at how the addition of …
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Modeling and Simulation of a Multi-Unit Tracked Vehicle
A multi-unit tracked vehicle such as a continuous haulage system is widely used in underground mining applications due to its high mobility and payload capacity on rugged and soft terrain. To automate such a system, a high fidelity model of a tracked vehicle is essential in designing a controller …
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Modelling flood heights of the Limpopo River at Beitbridge Border Post using extreme value distributions
Haulage trucks and cross border traders cross through Beitbridge border post from landlocked countries such as Zimbabwe and Zambia for the sake of trading. Because of global warming, South Africa has lately been experiencing extreme weather patterns in the form of very high temperatures and heavy …
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Energy efficiency and carbon dioxide emissions across different scales of iron ore mining operations in Western Australia
… the waste-ore ratio, grade of ore, average haulage distance and production capacity. The results of the regression analysis confirmed that it is the combined effect of all the aforementioned parameters that has a pronounced effect on the amount of energy consumed to process a unit of ore. …
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Optimizing underground, trackless loading and hauling systems
… to be utilized in today's underground trackless haulage mine is a complex problem which was dealt with in this research by systems simulation. The computer program developed by the Caterpillar Tractor Company served as the starting point for simulating the equipment's capabilities to move …
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Stochastic availability analysis and modeling of longwall mining operations
… face—conveying, roof—support, and outby—haulage. The operating characteristics of the longwall system are then investigated based on the system configuration, component failure and repair processes, and rules of operation. Through use of the techniques of reliability assessment and …
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Contract designs in the German piggyback transport industry : a transaction cost economics analysis
… o f the existing contracts for the specific haulage requested?’ The thesis models these transaction attributes o f the rail transport services for piggyback according to TCE and subsequently assigns them to the contract design elements o f the four types o f contracts. The first two contracts …
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Developing a quantitative framework for assessing and reporting mining's contributions to sustainable development
… life cycle, and specifically for low-carbon haulage technologies? 5. How does the contribution of mining to the SDGs compare for the closure/post-closure and production phases? How does the contribution of mining to the SDGs compare at the operation-, site-, and corporate-levels? This …
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Multi-body dynamic and finite element modeling of ultra-large dump truck - haul road interactions for machine health and haul road structural integrity
… on haul roads and predict strut pressures during haulage.</p> <p>Lagrangian mechanics was used to formulate the governing equations of the truck-haul road system. The equations were solved in MSC.ADAMS, based on multi-body dynamics, to generate the truck dynamic forces, which were verified and …
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Peat exploitation on Thorne Moors. A case-study from the Yorkshire-Lincolnshire border 1626-1963, with integrated notes on Hatfield Moors
… mechanisation of peat cutting and narrow gauge haulage is outlined.
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Determinants of the supply of urban public transport services in Harare, Zimbabwe
… sell their passenger vehicles and venture into haulage trucks instead. By the end of the research we should be able to list the factors affecting investment in this sector in their order of importance such that coming up with solutions to those most important factors may just unlock a lot of …
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