Efficient Cable Shovel Excavation In Surface Mines, 2011 Missouri University of Science and Technology
Efficient Cable Shovel Excavation In Surface Mines, Kwame Awuah-Offei, Samuel Frimpong
Mining Engineering Faculty Research & Creative Works
The cable shovel is widely used in surface mining. High operating and ownership costs necessitate efficient use of the cable shovel. Operator practices have long been suspected to contribute towards the inefficient use of the shovel. Crowd arm and hoist rope speeds are key measures of operator practices. the objective of this work is to find the crowd arm and hoist rope speeds for optimal shovel performance for given initial conditions and material properties. Shovel kinematics and dynamic modeling, using shovel geometry and the simultaneous constraint method, respectively, have been employed to build models of the excavation process. Dynamic models …
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, 2011 Missouri University of Science and Technology
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, Gavin H.R. Risley, Andrew Curtis Elmore, Joel Gerard Burken, Grzegorz (Greg) Galecki
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
While the Techniques and Technologies Associated with Contaminated Sediment Remediation Are Relatively Mature, There Are Several Issues Associated with These Practices that Make Them Unattractive. the Inability of Currently Used Mechanical Mixing Implements to Place Amendments in Aqueous Environments and their Intrusive Behavior toward Benthic Communities Are Just Two Examples of a Necessity for an Improved Delivery Method. Waterjets May Be a Viable Option for Placement of Particulate Remediation Amendments, Such as Activated Carbon and Granular Iron, at Depth. a Custom Waterjet Nozzle and Injection System Has Been Fabricated by the Authors to Examine This Delivery Concept. the Developed Injection …
Addressing The Dual Challenges Of Meeting Demand For Minerals And Sustainable Development, 2011 Missouri University of Science and Technology
Addressing The Dual Challenges Of Meeting Demand For Minerals And Sustainable Development, R. Larry Grayson
Mining Engineering Faculty Research & Creative Works
In recent decades, excellent progress has been made globally in finding mineral resources, extracting them efficiently and effectively, dramatically reducing environmental degradation, and preventing adverse health and safety impacts on workers and stakeholders. The industry has realized tremendous advances in technology and applied science; has met changing and more stringent environmental performance criteria; has made remarkable reductions in fatality, illness, and lost-time accident rates; and has connected better than ever before with the communities in which mining, milling, and smelting are housed. A new era focused on continuous improvement in tackling key sustainable development parameters has come and is intensifying …
Command And Control For Boring System, 2011 Missouri University of Science and Technology
Command And Control For Boring System, W. A. Berger, J. A. Carter, Marian Mazurkiewicz, R. M. Pell, R. A. Spalletta
Mining Engineering Faculty Research & Creative Works
A system having a number of land units [100, 4000, 5000] is disclosed which operates to efficiently find and create boreholes [5] to one or more underground targets [1]. Each of the land units [100, 4000, 5000] may be remotely controlled from a central command unit [6000]. The land unit also may be self-controlled, or partially controlled by the central command unit [6000]. The system [10] is reconfigurable to reallocate tasks to functional land units [100, 4000, 5000] which were originally allocated to land units which have been destroyed and are now non-functional.
Impact Effects Of Explosively Formed Projectiles On Normal And High Strength Concrete, 2011 Missouri University of Science and Technology
Impact Effects Of Explosively Formed Projectiles On Normal And High Strength Concrete, Laurin Ashley Bookout
Masters Theses
"The ability to quickly estimate the damage that a projectile will do to a structure is highly desired for structures that will be required to resist threats of this nature. There are several formulas for concrete penetration due to projectile impact that are based on empirical data. However, there is a lack of publicly available data for projectile impacts with striking velocities that exceed 1 km/s and have weights greater than a few grams. This research is intended to expand the available data on explosively formed projectile impacts and determine which, if any, of the existing equations can be used …
Diesel Particulate Matter Dispersion Analysis In Underground Metal/Nonmetal Mines Using Computational Fluid Dynamics, 2011 Missouri University of Science and Technology
Diesel Particulate Matter Dispersion Analysis In Underground Metal/Nonmetal Mines Using Computational Fluid Dynamics, Yi Zheng
Doctoral Dissertations
"Diesel Particulate Matter (DPM) is a natural by-product from operating diesel engines. Since diesel power is a major source of energy for mining operations today, the adverse health effects of DPM are of a great concern. To thoroughly resolve DPM problems, it is critical that DPM propagation characteristics be understood to arrive at a sensible and practical method for addressing DPM-related issues. To achieve this, a computational fluid dynamics (CFD) method is used to simulate DPM dispersion and to predict its concentration distribution. Industrial field studies were reconstructed to evaluate the possibility of different CFD models. Experiments were also carried …
Note: Autonomous Pulsed Power Generator Based On Transverse Shock Wave Depolarization Of Ferroelectric Ceramics, 2010 Missouri University of Science and Technology
Note: Autonomous Pulsed Power Generator Based On Transverse Shock Wave Depolarization Of Ferroelectric Ceramics, S. I. Shkuratov, Jason Baird, E. F. Talantsev
Mining Engineering Faculty Research & Creative Works
Autonomous pulsed generators utilizing transverse shock wave depolarization (shock front propagates across the polarization vector P0) of Pb(Zr0.52Ti0.48)O3 poled piezoelectric ceramics were designed, constructed, and experimentally tested. It was demonstrated that generators having total volume of 50 cm3 were capable of producing the output voltage pulses with amplitude up to 43 kV with pulse duration 4 µs. A comparison of high-voltage operation of transverse and longitudinal shock wave ferroelectric generators is given.
Electric Field-Free Gas Breakdown In Explosively Driven Generators, 2010 Missouri University of Science and Technology
Electric Field-Free Gas Breakdown In Explosively Driven Generators, S. I. Shkuratov, Jason Baird, E. F. Talantsev, Larry L. Altgilbers
Mining Engineering Faculty Research & Creative Works
All known types of gas discharges require an electric field to initiate them. We are reporting on a unique type of gas breakdown in explosively driven generators that does not require an electric field.
Turbulent Flow Studies Of A Scaled Model Of A Large Mining Truck - Computations And Experiment, 2010 Old Dominion University
Turbulent Flow Studies Of A Scaled Model Of A Large Mining Truck - Computations And Experiment, Wayne Randolph Sexton
Mechanical & Aerospace Engineering Theses & Dissertations
Modern mining operations are highly reliant on the amount of material that can be removed from the earth, transported to processing, and then processed. The companies that design and build mining dump trucks concentrate on improving the material payload capacity. Currently, the largest trucks are 400ton-class trucks. The design of these large mining dump trucks certainly does not stem from aerodynamics, but rather, from functionality and payload As a result, the shear size and asymmetric functional design creates interesting turbulent wakes on, around, and behind these trucks. This research focuses on the turbulent flow behind the truck. Computational Fluid Dynamic …
Source Attribution And Interannual Variability Of Arctic Pollution In Spring Constrained By Aircraft (Arctas, Arcpac) And Satellite (Airs) Observations Of Carbon Monoxide, 2010 Harvard University
Source Attribution And Interannual Variability Of Arctic Pollution In Spring Constrained By Aircraft (Arctas, Arcpac) And Satellite (Airs) Observations Of Carbon Monoxide, J. A. Fisher, D. J. Jacob, M. T. Purdy, M. Kopacz, P. Le Sager, Shiliang Wu, Et. Al.
Michigan Tech Publications
We use aircraft observations of carbon monoxide (CO) from the NASA ARCTAS and NOAA ARCPAC campaigns in April 2008 together with multiyear (2003–2008) CO satellite data from the AIRS instrument and a global chemical transport model (GEOS-Chem) to better understand the sources, transport, and interannual variability of pollution in the Arctic in spring. Model simulation of the aircraft data gives best estimates of CO emissions in April 2008 of 26 Tg month−1 for Asian anthropogenic, 9.4 for European anthropogenic, 4.1 for North American anthropogenic, 15 for Russian biomass burning (anomalously large that year), and 23 for Southeast Asian biomass burning. …
System For Rapidly Boring Through Materials, 2010 Missouri University of Science and Technology
System For Rapidly Boring Through Materials, W. A. Berger, J. A. Carter, C. Davey, Marian Mazurkiewicz, R. M. Pell, R. A. Spalletta
Mining Engineering Faculty Research & Creative Works
The present invention is a self-contained, high-energy liquid rock-boring system that will bore a small-diameter access hole [5] several hundred meters through hard granite and other obstacles within minutes of deployment. It employs a land unit [100] platform subsystem [1000] with an energetic fluid fuel reservoir [1300] and a boring subsystem [3000] having a plurality of pulsejets [3100]. Each pulsejet [3100] repeatedly ignites the energetic fluid [7] causing a plurality of rapidly-expanding gas bubbles [3250] which create and force a plurality liquid slugs [10] ahead of them rapidly out through a nozzle [3260] causing the slugs [10] to impact against …
Measuring Blast Induced Rock Damage From Pre-Splitting Sandstone By Applying The Multichannel Analysis Of Surface Waves Geophysical Method, 2010 Missouri University of Science and Technology
Measuring Blast Induced Rock Damage From Pre-Splitting Sandstone By Applying The Multichannel Analysis Of Surface Waves Geophysical Method, Charles Bradford Zdazinsky
Masters Theses
"Many blasting applications in the mining industry demand that the hard rock being blasted remains structurally competent. For example, pre-splitting is a common technique to reduce fracturing, and operators of dimension stone quarries use this blasting method to eliminate overbreak. When pre-split design parameters are not applied correctly, there will be a redistribution of stresses within the rock, resulting in Blast Induced Rock Damage (BID). Advances in geophysical technology are enabling blast technicians to monitor BID and then use the results to correctly design their blasts. The Multichannel Analysis of Surface Waves (MASW) geophysical method is new technology that is …
The Mitigation Effects Of A Barrier Wall On Blast Wave Pressures, 2010 Missouri University of Science and Technology
The Mitigation Effects Of A Barrier Wall On Blast Wave Pressures, Nathan Thomas Rouse
Masters Theses
"The study examined the mitigating effects of a blast barrier wall. This area of blast mitigation is of interest due to the many different applications involved in protecting a specific target from an explosive attack. The research follows a 1:50 scale layout using 73 gram, hemisphere-shaped, Composition-4 charges detonated at combinations of three standoff distances from a blast barrier wall set at three different heights. This project used 45 data points for each combination of standoff distance and wall height. This project expanded prior research conducted by the United States Army Corps of Engineers (USACE) by increasing the database of …
Application Of Life Cycle Assessment To Estimate Environmental Impacts Of Surface Coal Mining, 2010 Missouri University of Science and Technology
Application Of Life Cycle Assessment To Estimate Environmental Impacts Of Surface Coal Mining, Ofentse Ditsele
Masters Theses
"Coal plays an important role in meeting the energy needs of the World. Given its abundance and low cost, its use is bound to increase with the growing energy demand. Despite its importance, there are concerns over coal's environmental burdens. In order to extract and use coal in a sustainable manner, sustainability assessment has to be comprehensive. Life Cycle Assessment (LCA) provides systematic and quantifiable measures for assessing environmental burdens of products and processes. Extensive LCA work has been done on coal use, particularly in electricity generation, but, the coal mining stage has been neglected, for the most part. This …
Explosives Recognition And Awareness Training: A Psychological Approach To Pre-Blast Mitigation, 2010 Missouri University of Science and Technology
Explosives Recognition And Awareness Training: A Psychological Approach To Pre-Blast Mitigation, James Wade Hawkins
Masters Theses
"The nation's security strategy tends to be reactionary to a specific event. It is rare when established policies have proven successful, even though there is substantial financial and resource investment. The payoff is measured by analyzing the desired minimal effect rather than prevention of the event altogether. Such is the case in combating explosives-related threats. Today, research and development, science and technology, are plugged as the saviors of a post-blast event. Synthetic and composite materials are used to strengthen barriers and cutting-edge technology is utilized to refine the latest in standoff detection. These legitimate measures provide a sense of security …