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High Explosive Crater Studies: Desert Alluvium

Description: From abstract: Crater dimensions have been determined for 23 explosions of 256-pound spherical TNT charges buried in desert alluvium. As opposed to previous work covering depths of burst as great as 6 feet, the work presented in this report extends knowledge of apparent crater radius and depth to depths of burst as great as 30 feet.
Date: May 1961
Creator: Murphey, Byron F.
Partner: UNT Libraries Government Documents Department

Historical Documentation of Major Coal-Mine Disasters in the United States not Classified as Explosions of Gas or Dust: 1846-1962

Description: From Summary: "This publication lists and provides brief accounts of the major disasters not classified as explosions of gas or dust that have occurred in the coal mines of the United States from the earliest times to the present."
Date: 1963
Creator: Keenan, Charles M.
Partner: UNT Libraries Government Documents Department

A Study of Mine Examination Techniques for Detecting and Identifying Underground Nuclear Explosions

Description: Report issued by the U.S. Bureau of Mines discussing techniques for detecting and studying underground nuclear explosions. As stated in the introduction, this report results from a study of only one part of the contemplated inspection system, specifically the final phases embracing on-site investigations and mine examination techniques" (p. 1). This report includes tables, illustrations, and photographs.
Date: 1962
Creator: United States. Bureau of Mines.
Partner: UNT Libraries Government Documents Department

The Surface Wave Magnitude for the 9 October 2006 North Korean Nuclear Explosion

Description: Surface waves were generated by the North Korean nuclear explosion of 9 October 2006 and recorded at epicentral distances up to 34 degrees, from which we estimated a surface wave magnitude (M{sub s}) of 2.94 with an interstation standard deviation of 0.17 magnitude units. The International Data Centre estimated a body wave magnitude (m{sub b}) of 4.1. This is the only explosion we have analyzed that was not easily screened as an explosion based on the differences between the M{sub s} and m{sub b} estimates. Additionally, this M{sub s} predicts a yield, based on empirical M{sub s}/Yield relationships, that is almost an order of magnitude larger then the 0.5 to 1 kiloton reported for this explosion. We investigate how emplacement medium effects on surface wave moment and magnitude may have contributed to the yield discrepancy.
Date: March 11, 2008
Creator: Bonner, J; Herrmann, R; Harkrider, D & Pasyanos, M
Partner: UNT Libraries Government Documents Department

Explosion Hazards in Storage-Battery Rooms

Description: Report issued by the Bureau of Mines discussing the safety and explosion hazards present in storage-battery rooms. Descriptions of storage-battery rooms and methods of ventilation are presented. This report includes tables, illustrations, and photographs.
Date: 1940
Creator: Jones, G. W.; Campbell, John; Dillon, R. E. & Benson, O. B.
Partner: UNT Libraries Government Documents Department

Preventing Worker Injuries and Deaths from Explosions in Industrial Ethylene Oxide Sterilization Facilities: Revised Edition

Description: This report provides information on the explosions and resulting injuries or deaths that may occur from working with ethylene oxide and recommends steps for preventing these explosions.
Date: 2007
Creator: United States. National Institute for Occupational Safety and Health
Partner: UNT Libraries Government Documents Department

Notes on Explosive Mine Gases and Dusts: with Special Reference to Explosions in the Monongah, Darr, and Naomi Coal Mines

Description: From Introduction: "The studies herein reported were begun as a part of researches undertaken by the United States Geological Survey looking to the more efficient utilization of the coal in the United States through the reduction of the waste in its extraction, and were continued as part of further researches having regard to the conversation of the fuel resources of this country and to the lessening of injuries and fatalities in coal mining."
Date: 1909
Creator: Chamberlin, Rollin Thomas
Partner: UNT Libraries Government Documents Department

Historical Summary of Coal-Mine Explosions in the United States, 1810-1958

Description: Purpose of Review: "The purpose of this review is to relate the growth of explosion hazards to the increased number and size of the coal mines and the changes in mining methods. The causes of explosions during each period of years are discussed to show progress or its lack in controlling or eliminating different causes."
Date: 1960
Creator: Humphrey, H. B.
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

A calculation to simulate the underground Bernalillo shot

Description: From abstract: "Detailed calculations were undertaken in an attempt to explain some post-shot observations of the underground Bernalillo shot. A procedure was developed to calculate with a one-space dimensional code both the flow of energy up and down the hole and the energy loss into the walls of the hole."
Date: 1961
Creator: Brownlee, Robert R.
Partner: UNT Libraries Government Documents Department

An Optical Fallout Analogue

Description: This report describes the optical analogue that contains an optical filtering system which controls the intensity of light according to the assumed initial distribution of activity over height and particle size and according to the assumed decay rate, a size control system which depends on the lateral dimensions of the cloud of debris and adjusts the size of the light beam accordingly, and a position control system which moves the beam to the correct position on the plate as determined by the wind structure and the time of fall of the particles.
Date: October 1955
Creator: Felt, Gaelen L.
Partner: UNT Libraries Government Documents Department

Pressure Rise, Gas Vibrations and Combustion Noises During the Explosion of Fuels

Description: "In the use of piezo-quartz indicators for high-speed automobile engines, the interpretation of pressure-time diagrams made by an oscillograph offers certain difficulties. On the one hand, the scale of the pressure amplitudes is not always the same under all conditions, while, on the other hand, the atmospheric zero line may be shifted from its correct position in the oscillogram. These facts make necessary to verify the readings of the quartz indicators by direct calibration before and after each series of tests and, on the basis of the results, to determine the scale for the oscillograms" (p. 1).
Date: June 1933
Creator: Wawrziniok
Partner: UNT Libraries Government Documents Department

Some Effects of Argon and Helium Upon Explosions of Carbon Monoxide and Oxygen

Description: Report presents the results of an investigation conducted to study the effects of the inert gases, argon and helium, upon flame speed and expansion ratio in exploding mixtures of carbon monoxide, oxygen and water. For the particular gas mixtures investigated the results show that: (1) With the possible exception of helium in small amounts the addition of inert gas always produces decreased flame speed and expansion ratio; (2) like volumes of argon and helium have very different effects upon flame speed but practically the same effect upon expansion ratio; and (3) the difference in the effect of these two gases upon speed is independent of the ratio of carbon monoxide to oxygen. A discussion of some possible modes by which inert gases may produce the observed effects is included.
Date: September 25, 1935
Creator: Fiock, Ernst F. & Roeder, Carl H.
Partner: UNT Libraries Government Documents Department

A Small-scale Investigation of the Possibility of Constructing Low-Relief Earth-Fill Dams Using Nuclear Explosives

Description: The experiment described herein has shown that the concept of low dams produced by ballistic collision of ejecta from simultaneous detonation of properly spaced parallel rows of charges is a feasible one. Rows of 8-pound charges were buried 3 feet deep with 4-foot spacing between charges. When two such rows of charges were placed parallel and 17.5 feet apart, the maximum height of the "dam" was achieved. The spacing of 17.5 feet between rows corresponds to 4.7 times the crater radius of one 8-pound charge at the burial depth which maximizes the single-charge crater. The extrapolation of these results to larger explosions is discussed. The height decreases and the width increases as the spacing between rows is further increased. The mass of material in the "dam" cannot exceed that in the crater of one of the rows. At the spacing between rows which maximizes height, the volume of the "dam'' is about 50 percent of maximum volume theoretically achievable. At wider spacings, the volume increases to 75 percent.
Date: February 1965
Creator: Vortman, Luke J.
Partner: UNT Libraries Government Documents Department