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Review of Literature on Effects of Breathing Dusts with Special Reference to Silicosis

Description: From Introduction: "This bulletin is an attempt to assemble information in convenient form on effects of breathing dusts, largely in the mining and allied industries. The literature on this subject is so extensive that no attempt has been made to include all published material or all types of dust disease but only to assemble some of the more outstanding data on several aspects of the subject, especially with reference to silicosis."
Date: 1937
Creator: Harrington, D. & Davenport, Sara J.
Partner: UNT Libraries Government Documents Department

A Laboratory Study of the Inflammability of Coal Dust

Description: From Introduction: "Much knowledge has been gained from the work done in the large galleries constructed at official and semiofficial stations in this country and abroad, but the study of the coal-dust problem in these galleries requires so much time and is so costly that there is a need of a reliable laboratory method for obtaining a classification if the great variety of dusts that occur in mines. The investigation described in this paper was an attempt to devise such a method."
Date: 1913
Creator: Frazer, J. C. W.; Hoffman, E. J. & Scholl, L. A., Jr.
Partner: UNT Libraries Government Documents Department

First Series of Coal-Dust Explosion Tests in the Experimental Mine

Description: From Introduction: "This report has been prepared, not only for the purpose of recoding the results of the first series of coal-dust tests conducted in the experimental mine of the Bureau of Mines, but also to place before the mining public a description of the mine and an account of the objects sought in an its establishment."
Date: 1913
Creator: Rice, George S.; Jones, L. M.; Clement, J. K. & Egy, W. L.
Partner: UNT Libraries Government Documents Department

Siliceous Dust in Relation to Pulmonary Disease Among Miners in the Joplin District, Missouri

Description: From Introduction: "This report describes the lead and zinc deposits and the mining methods employed in the sheet-ground area of the Joplin district, Missouri, and discusses the causes and the methods of abating rock dust in the mines, the chemical and physical characteristics of the dust, and the quantities present in mine air."
Date: 1917
Creator: Higgins, Edwin; Lanza, A. J.; Laney, F. B. & Rice, George S.
Partner: UNT Libraries Government Documents Department

Tests of Rock-Dust Barriers in the Experimental Mine

Description: From Introduction: "The results summarized above are discussed in appropriate sections of this paper. One section is also devoted to barrier installations in commercial mines and gives the experience and opinion of the authors on the matter. The final sections deal with theoretical considerations involved in barrier operation."
Date: 1932
Creator: Rice, George S.; Greenwald, H. P. & Howarth, H. C.
Partner: UNT Libraries Government Documents Department

Explosion Tests of Pittsburgh Coal Dust in the Experimental Mine, 1925 to 1932, Inclusive

Description: From Introduction and Summary: "The first of these was Bulletin 353, dealing with the tests of rock-dust barriers; the second is the present paper, which reports tests made to determine the effect on the explosibility of Pittsburgh coal dust of altering conditions under which the tests were made; the third, dealing with tests of dust prepared from approximately 20 coals taken from beds in mines in different parts of the United States, will follow after the completion of testing in progress at the time of writing."
Date: 1933
Creator: Rice, George S.; Greenwald, H. P. & Howarth, H. C.
Partner: UNT Libraries Government Documents Department

Stone Dusting or Rock Dusting to Prevent Coal-Dust Explosions, as Practiced in Great Britain and France

Description: From Introduction: "Coal dust as an agent of widespread explosions had been under suspicion, and watering to allay the dust was recommended by some mining engineers but the watering of coal-mine dust was adopted in comparatively few mines of the United States and Great Britain, and had not been introduced widely in any country except Germany. Rock dusting, another method of preventing explosions of coal dust, was early tested with success by the Bureau of Mines in its first gallery at Pittsburgh and, beginning in 1911, at the experimental mine, Bruceton, Pa."
Date: 1924
Creator: Rice, George S.
Partner: UNT Libraries Government Documents Department

Survey of Dust-Control Practices in the Coal-Mining Industry

Description: Report issued by the U.S. Bureau of Mines discussing dust-control of coal mining operations. As stated in the summary, "this circular presents results of a survey conducted by the Bureau of Mines to ascertain the extent to which dust-control practices are employed in the coal-mining industry" (p. 1). This report includes tables, illustrations, and photographs.
Date: April 1956
Creator: Barnes, R. W.; Gregory, M. J.; Owings, C. W. & Berger, L. B.
Partner: UNT Libraries Government Documents Department

Characterization of U.S. Cement Kiln Dust

Description: Report issued by the U.S. Bureau of Mines discussing the characterization of cement kiln dust. Mineralogy, chemical analysis, and hazardous waste potential of kiln dust is presented. This report includes tables.
Date: 1982
Creator: Haynes, Benjamin W. & Kramer, Gary W.
Partner: UNT Libraries Government Documents Department

Low-Pressure Boundary-Layer Control in Diffusers and Bends

Description: Report presenting tests to study the effectiveness of small pressure differences in removing the dust boundary layer through slots in the duct wall of airplane ducts and reducing separation losses. Two-dimensional diffusers of 15 and 30 degrees included angles and some 90 degree bends were tested. The 30 degree diffuser was tested with and without an intercooler.
Date: April 1945
Creator: Biebel, William J.
Partner: UNT Libraries Government Documents Department

Technology and Policy for Suppressing Grain Dust Explosions in Storage Facilities

Description: This report responds to the bipartisan request of the House Committee on Agriculture to assess alternative technologies with regard to their effectiveness in suppressing grain dust, the benefits and costs of each technology, and the costs of banning the use of water as a dust suppressant.
Date: September 1995
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department

The Reduction of Airborne Dust Generated by Roof Bolt Drill Bits Through the Use of Water

Description: Abstract: In the vast majority of American coal mines, roof bolt holes are drilled dry, mainly because of mine operator concern with the spent water creating adverse working conditions. Wet drilling, however, can increase drilling rates and the effective lifetime of the drill bits used. This study, carried out as part of an ongoing cooperative research program between the U.S. Bureau of Mines and the University of Missouri-Rolla, shows that the large volumes of water conventionally used in wet drilling are not necessary, and the performance benefits from wet drilling can be achieved with total volume flows on the order of 0.4 L per hole. This conclusion is validated based on the measured respirable dust generated in drilling Berea sandstone. The results are confirmed using a variety of bit shapes, which are also shown to have a significant effect on penetration rate.
Date: 1995
Creator: Sundae, Laxman S.; Summers, David A.; Wright, Douglas & Cantrell, Bruce K.
Partner: UNT Libraries Government Documents Department

A Balsa-Dust Technique for Air-Flow Visualization and Its Application to Flow Through Model Helicopter Rotors in Static Thrust

Description: Note presenting a method of visualizing air-flow patterns by observing the motion of finely divided particles of balsa wood introduced into the air. Photographic results obtained by this method for small-scale models of several helicopter rotor configurations in the static-thrust condition are presented. The results indicate the feasibility of using the balsa-dust technique for obtaining useful qualitative information on the air-flow patterns for transient conditions as well as for steady-state conditions.
Date: November 1950
Creator: Taylor, Marion K.
Partner: UNT Libraries Government Documents Department

Design and Construction Solutions in the Accurate Realization of NCSX Magnetic Fields

Description: The National Compact Stellarator Experiment, NCSX, is being constructed at the Princeton Plasma Physics Laboratory (PPPL) in partnership with the Oak Ridge national Laboratory. The goal of NCSX is to provide the understanding necessary to develop an attractive, disruption free, steady state compact stellaratorbased reactor design. This paper describes the recently revised designs of the critical interfaces between the modular coils, the construction solutions developed to meet assembly tolerances, and the recently revised trim coil system that provides the required compensation to correct for the “as built” conditions and to allow flexibility in the disposition of as-built conditions. In May, 2008, the sponsor decided to terminate the NCSX project due to growth in the project’s cost and schedule estimates. However significant technical challenges in design and construction were overcome, greatly reducing the risk in the remaining work to complete the project.
Date: September 29, 2008
Creator: Heitzenroeder, P.; Dudek, Lawrence E.; Brooks, Arthur W.; Viola, Michael E.; Brown, Thomas; Neilson, George H. et al.
Partner: UNT Libraries Government Documents Department

Large Aperture Electrostatic Dust Detector

Description: Diagnosis and management of dust inventories generated in next-step magnetic fusion devices is necessary for their safe operation. A novel electrostatic dust detector, based on a fine grid of interlocking circuit traces biased to 30 or 50 ν has been developed for the detection of dust particles on remote surfaces in air and vacuum environments. Impinging dust particles create a temporary short circuit and the resulting current pulse is recorded by counting electronics. Up to 90% of the particles are ejected from the grid or vaporized suggesting the device may be useful for controlling dust inventories. We report measurements of the sensitivity of a large area (5x5 cm) detector to microgram quantities of dust particles and review its applications to contemporary tokamaks and ITER.
Date: October 9, 2007
Creator: Skinner, C. H.; Hensley, R. & Roquemore, A. L.
Partner: UNT Libraries Government Documents Department

Concrete Dust Suppression System. Innovative Technology Summary Report

Description: The improved technology is a water-based dust suppression system for controlling concrete dust generated by demolition equipment, in this case a demolition ram. This demonstration was performed to assess the effectiveness of this system to (1) minimize the amount of water used to suppress potentially contaminated dust, (2) focus the water spray on the dust-generating source and (3) minimize the dust cloud generated by the demolition activity. The technology successfully reduced the water required by a factor of eight compared to the traditional (baseline) method, controlled the dust generated, and permitted a reduction in the work force. The water spray can be focused at the ram point, but it is affected by wind. Prior to the use of this dust control system, dust generated by the demolition ram was controlled manually by spraying with fire hoses (the baseline technology). The improved technology is 18% less expensive than the baseline technology for the conditions and parameters of this demonstration, however, the automated system can save up to 80% versus the baseline whenever waste water treatment costs are considered. For demolishing one high-walled room and a long slab with a total of 413 m{sup 3} (14,580 ft{sup 3}) of concrete, the savings are $105,000 (waste water treatment included). The improved technology reduced the need for water consumption and treatment by about 88% which results in most of the savings.
Date: December 1, 1998
Partner: UNT Libraries Government Documents Department

Advances in Electrostatic Dust Detection on Remote Surfaces

Description: The inventory of dust in next-step magnetic fusion devices will be regulated for safety reasons, however diagnostics to measure in-vessel dust are still in their infancy. Advances in dust particle detection on remote surfaces are reported. Two grids of interlocking circuit traces with spacing in the range 125 mu m to 25 mu m are biased to 30 V. Impinging dust creates a short circuit and the result current pulse is recorded. The detector response was measured with particles scraped from a carbon fiber composite tile and sorted by size category. The finest 25 mu m grid showed a sensitivity more than an order of magnitude higher than the 125 mu m grid. The response to the finest particle categories (5 –30 mu m) was two orders of magnitude higher than the largest (125 –250 mu m) category. Longer duration current pulses were observed from the coarser particles. The results indicate a detection threshold for fine particles below 1 mu g/cm^2.
Date: February 9, 2005
Creator: Voinier, C.; Skinner, C. H. & Roquemore, A. L.
Partner: UNT Libraries Government Documents Department

A Study to Determine Potential Dust Exposure in Connection with Intermittent Rock Drilling in Coal Mines

Description: Report issued by the Bureau of Mines over studies conducted on the dust exposure to mine workers. Contents of dust produced from drilling are noted. Health hazards of drilling dust is also presented. This report includes tables, and graphs.
Date: October 1953
Creator: Owings, C. W. & Johnson, Leslie
Partner: UNT Libraries Government Documents Department

Improved Performance of Linear Coal Cutting Compared with Rotary Cutting

Description: From abstract: The linear cutting system, developed by the U.S. Bureau of Mines, uses geometric principles developed by Cardan to produce a nearly constant cut depth. The new system has been extensively tested in a synthetic material under laboratory conditions to verify mechanical capability and to identify operational characteristics. This report details the improved performance versus rotary cutting.
Date: 1995
Creator: Roepke, Wallace W.; Hanson, B. D.; Olson, R. C.; Wingquist, C. F. & Myren, T. A.
Partner: UNT Libraries Government Documents Department

Dust Sources and Controls for Multiple-Machine Longwall Faces

Description: Abstract: Longwall mining in lower seam heights may necessitate the use of single-drum shearers to overcome size constraints associated with standard double-drum shearers. To avoid the operational problem of clearance in the tailgate entry with one single-drum shearer, two single-drum machines can be operated on the same face, with each shearer responsible for mining a predefined portion of the face. However, utilization of two shearers on the same face necessitates the positioning of one shearer operator and a jacksetter in the return air of the upwind shearer, thus complicating respirable dust control on the longwall. In an effort to evaluate the unique dust control problems associated with this type of mining, the U.S. Bureau of Mines conducted dust surveys on two multiple-machine longwall operations. Sampling was done to quantify major sources of respirable dust and to identify potential solutions to problem areas. Sampling results indicate that the cutting sequences utilized on multiple-machine faces may have to be designed to minimize dust exposure, as opposed to optimizing productivity or facilitating operational requirements. Also, state-of-the-art dust control techniques typically found on double-drum shearer longwalls must be employed to help minimize the exposure of all face personnel to traditional dust sources.
Date: 1995
Creator: Colinet, Jay F. & Spencer, Ellsworth R.
Partner: UNT Libraries Government Documents Department

Reducing Respirable Dust Levels During Bag Conveying and Stacking Using Bag and Belt Cleaner Device

Description: Abstract: The U.S. Bureau of Mines has designed and tested a system called the Bag and Belt (leaner Device (B&BCD) to reduce dust levels in and around the bag conveying and stacking process. The device physically cleans either 22.7 kg (50 lb) or 45.4 kg (100 lb) paper bags by using a combination of brushes and air jets. It is completely self-contained and is kept under negative pressure by a baghouse to ensure that dust and product removed from the bags during cleaning does not flow into the work environment and contaminate workers. The bags travel through the device on a chain conveyor, which permits any product or dust cleaned from the bags to fall into a hopper at the bottom of the device and be recycled back into the process via a screw conveyor. Once exiting the B&BCD, the outside of the bags and the conveyor are essentially product and dust free. The B&BCD was evaluated at two mineral processing plants to determine reductions with the device in use. The results of both field evaluations showed that the amount of product removed from the outside of the bags varied from 77 to 93 pct.
Date: 1995
Creator: Cecala, Andrew B.; Timko, Robert J. & Prokop, Alexander D.
Partner: UNT Libraries Government Documents Department

Silicosis and Tuberculosis Among Miners of the Tri-State District of Oklahoma, Kansas and Missouri--[Part] 1: For the Year Ended June 30, 1928

Description: Report issued by the Bureau of Mines discussing the occurrence of tuberculosis and silicosis among mine workers of the Tri-State district including Oklahoma, Kansas, and Missouri. Past history of the diseases are presented, as well as the standard means of examination of miners. This report includes a map, tables, illustrations, and photographs.
Date: 1933
Creator: Sayers, R. R.; Meriwether, F. V.; Lanza, A. J. & Adams, W. W.
Partner: UNT Libraries Government Documents Department