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Articles 1 - 14 of 14
Full-Text Articles in Mining Engineering
Day 5. Friday, August 15, 2003: Rocky Mountain National Park, University Of Colorado Boulder. Natural Resources Law Center
Day 5. Friday, August 15, 2003: Rocky Mountain National Park, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
1 page.
Contains references.
Day 4. Thursday, August 14, 2003: Trapper Mine, University Of Colorado Boulder. Natural Resources Law Center
Day 4. Thursday, August 14, 2003: Trapper Mine, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
8 pages (includes some color illustrations).
Contains references.
Day 4. Thursday, August 14, 2003: Hayden Power Plant, University Of Colorado Boulder. Natural Resources Law Center
Day 4. Thursday, August 14, 2003: Hayden Power Plant, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
5 pages (includes color illustrations and maps).
Contains references.
Day 3. Wednesday, August 13, 2003: Travel To Grand Junction, University Of Colorado Boulder. Natural Resources Law Center
Day 3. Wednesday, August 13, 2003: Travel To Grand Junction, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
5 pages (includes color illustration and map).
Contains references.
Day 3. Wednesday, August 13, 2003: Oil Shale, University Of Colorado Boulder. Natural Resources Law Center
Day 3. Wednesday, August 13, 2003: Oil Shale, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
8 pages.
Contains references.
Day 3. Wednesday, August 13, 2003: Lighthawk Flyover, University Of Colorado Boulder. Natural Resources Law Center
Day 3. Wednesday, August 13, 2003: Lighthawk Flyover, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
11 pages (includes some color illustrations and maps).
Contains references.
Day 3. Wednesday, August 13, 2003: Coalbed Methane Development, University Of Colorado Boulder. Natural Resources Law Center
Day 3. Wednesday, August 13, 2003: Coalbed Methane Development, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
10 pages (includes color illustrations and maps).
Day 2. Tuesday, August 12, 2003: Roan Plateau Proposed Wilderness Area, Roan Plateau
Day 2. Tuesday, August 12, 2003: Roan Plateau Proposed Wilderness Area, Roan Plateau
Energy Field Tour 2003 (August 11-16)
4 pages (includes color illustration).
Contains references.
Agenda: Energy Field Tour 2003, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Energy Field Tour 2003, University Of Colorado Boulder. Natural Resources Law Center
Energy Field Tour 2003 (August 11-16)
Congressional staff tour held August 11-16, 2003
Summary: Binder of assorted articles, maps, brochures and other materials prepared for participants of the tour
Contents:
MONDAY, AUGUST 11, 2003: BLUE SPRUCE PEAKER PLANT: University of Colorado Natural Resources Law Center : congressional staff tour of Blue Spruce Energy Center / Peggy Duxbury -- 'Power Struggle', National Journal, June 27, 2003 / Margaret Kritz -- 'Calpine's Blue Spruce Energy Center begins commercial operation', Calpine press release, April 17, 2003 -- NATIONAL RENEWABLE ENERGY LAB: NREL at a glance -- NREL technologies -- SHOSHONE HYDROELECTRIC PLANT: 'River District Board supports spring Shoshone call …
Sizes And Shapes Of 10-Ma Distal Fall Pyroclasts In The Ogallala Ggroup, Nebraska, William I. Rose, C. M. Riley, S. Dartevelle
Sizes And Shapes Of 10-Ma Distal Fall Pyroclasts In The Ogallala Ggroup, Nebraska, William I. Rose, C. M. Riley, S. Dartevelle
Department of Geological and Mining Engineering and Sciences Publications
Size distributions of distal ashfall particles from correlated 10-Ma layers in Nebraska, measured using laser diffraction methods, are lognormal with mode diameters of ∼90 mm. This ashfall is ∼100% bubble-wall shards of rhyolite glass and apparently represents a distal ashfall from an eruption 1400 km away. Measured terminal velocities of these ash particles are 0.2–18 cm/s, consistent with Stokes Law settling of spherical particles with diameters of 9–50 mm. Surface area of the ash particles, measured with gas adsorption, is 20–30 times the surface area of equivalent Stokes spheres. These results highlight the effects of shape and atmospheric drag in …
Quantitative Shape Measurements Of Distal Volcanic Ash, William I. Rose, Colleen M. Riley, Gregg J. Bluth
Quantitative Shape Measurements Of Distal Volcanic Ash, William I. Rose, Colleen M. Riley, Gregg J. Bluth
Department of Geological and Mining Engineering and Sciences Publications
Large-scale volcanic eruptions produce fine ash (< 200 μm) which has a long atmospheric residence time (1 hour or more) and can be transported great distances from the volcanic source, thus, becoming a hazard to aircraft and public health. Ash particles have irregular shapes, so data on particle shape, size, and terminal velocities are needed to understand how the irregular-shaped particles affect transport processes and radiative transfer measurements. In this study, a methodology was developed to characterize particle shapes, sizes , and terminal velocities for three ash samples of different compositions. The shape and size of 2,500 particles from 1) distal fallout (~100 km) of the October 14, 1974 Fuego eruption (basaltic), 2) the secondary maxima (~250 km) of the August 18, 1992 Spurr eruption (andesitic), and 3) the Miocene Ash Hollow member, Nebraska (rhyolitic) were measured using image analysis techniques. Samples were sorted into 10 to 19 terminal velocity groups (0.6-59.0 cm/s) using an air elutriation device. Grain size distributions for the samples were measured using laser diffraction. Aspect ratio, feret diameter, and perimeter measurements were found to be the most useful descriptors of how particle shape affects terminal velocity. These measurement values show particle shape differs greatly from a sphere (commonly used in models and algorithms). The diameters of ash particles were 10-120% larger than ideal spheres at the same terminal velocity, indicating that irregular particle shape greatly increases drag. Gas-adsorption derived surface areas are 1 to 2 orders of magnitude higher than calculated surface areas based on measured dimensions and simple geometry, indicating that particle shapes are highly irregular. Correction factors for surface area were derived from the ash sample measurements so that surface areas calculated by assuming spherical particle shapes can be corrected to reflect more realistic values.
Retrieval Of Mass And Sizes Of Particles In Sandstorms Using Two Modis Ir Bands: A Case Study Of April 7 2001 Sandstorm In China, Yingxin Gu, William I. Rose, Gregg J. Bluth
Retrieval Of Mass And Sizes Of Particles In Sandstorms Using Two Modis Ir Bands: A Case Study Of April 7 2001 Sandstorm In China, Yingxin Gu, William I. Rose, Gregg J. Bluth
Department of Geological and Mining Engineering and Sciences Publications
A thermal infrared remote sensing retrieval method developed by Wen and Rose [1994], which retrieves particle sizes, optical depth, and total masses of silicate particles in the volcanic cloud, was applied to an April 07, 2001 sandstorm over northern China, using MODIS. Results indicate that the area of the dust cloud observed was 1.34 million km2, the mean particle radius of the dust was 1.44 μm, and the mean optical depth at 11 μm was 0.79. The mean burden of dust was approximately 4.8 tons/km2 and the main portion of the dust storm on April 07, 2001 contained 6.5 million …
Method Of Scrapping Steel Structures, G. E. Shapiro, Paul Nicholas Worsey
Method Of Scrapping Steel Structures, G. E. Shapiro, Paul Nicholas Worsey
Mining Engineering Faculty Research & Creative Works
A method of breaking up a structure for the recovery of steel as scrap. The structure has steel plates forming a compartment secured to framing in the compartment. The method includes at least partially filling the compartment with a substantially incompressible substance and placing explosive in the substance in the compartment. The explosive is sufficient and adapted on detonation thereof to pressurize the compartment to the extent of causing separation of the plates from the framing. The method further includes detonating the explosive.
Novel Concepts For Monitoring The Stability Of Open Pit Mine Highwalls Using Radar Interferometry And Spectral Imaging, Jami Girard Dwyer
Novel Concepts For Monitoring The Stability Of Open Pit Mine Highwalls Using Radar Interferometry And Spectral Imaging, Jami Girard Dwyer
Masters Theses
"Ground control problems at surface mining operations can occur for a variety of reasons. The geologic setting, rock strengths, joint spacing, orientation, pore pressures, and many other factors contribute to slope instabilities that range from small rock falls to massive slides of material. While much of this ground movement can be predicted or controlled, each year many completely unexpected failures occur. This poses serious safety and economic issues for the mining industry, since any unanticipated movement of the ground increases the potential for significant property damage, injuries, and even death. In the United States alone, 70 people died in slope …