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Detection of Distant Explosions by Seismic Measurements in Deep Boreholes

Description: Report presenting the results of a program of research on the depth-well method of obtaining improved signal-to-noise ratios in seismic recordings. Experiments were conducted comparing simultaneous measurements of seismic signals in adjacent cased and open boreholes. Design and performance features of a moving coil geophone for borehole use are described. A balldrop method of geophone calibration is described. The improvement of signal-to-noise ratio with depth for the first ''P'' arrival was d… more
Date: July 31, 1962
Creator: VanSandt, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deep Underground Test Shots

Description: From abstract: "The purpose of this note is to consider the feasibility of conducting kiloton-weapons tests in underground holes sufficiently deep so that the explosion will be effectively contained. Such a shot would have the advantage that it could be detonated independently of weather conditions, and thus would allow greater freedom in the test program."
Date: February 21, 1956
Creator: Griggs, David, 1911-1974 & Teller, Edward, 1908-2003
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Technical and economic potentials of shale oil production by nuclear explosives

Description: "In the following report, a new technology is discussed which was first proposed in 1959, but which has been developed mainly since 1964; the in situ production of oil from shale by large underground retorts created by nuclear explosives. The first part of the present report describes this new process; the second part gives an analysis of the United States and the world endowments with crude oil resources and oil shale deposits and finally, the third part deals with expected cost estimates of t… more
Date: August 31, 1967
Creator: Heiss, Klaus-Peter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Non-military Uses of Nuclear Explosions

Description: Introduction. With the development of fission and subsequently of thermonuclear explosives, a very large source of cheap energy has become available. The problem of using this energy for peaceful purposes safely and economically presents itself as one of the most interesting and important of our time. In explosions the energy is released very suddenly. Conversion of this sudden release of energy at extremely high temperature and pressure into the form of useful work, either mechanical or chemic… more
Date: January 6, 1960
Creator: Brown, Harold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Seismic Decoupling for Explosions in Spherical Cavities

Description: Abstract. A series of paired explosions in a salt mine near Winnfield, Louisiana, has been conducted to test a theory by Dr. A. L. Latter concerning seismic decoupling by underground cavities. The theory predicted a decoupling of about 100. Free-field and surface measurements from an explosion in either a 6-ft- or a 15-ft-radius spherical cavity were compared with similar measurements from a completely tamped explosion. Shot sixes were from a 10 lb up to a few tons. Surface measurements were ma… more
Date: September 30, 1960
Creator: Adams, William M. & Carder, Dean S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear Explosives as Applied to Mining and Mineral Industries

Description: Presentation at the National Western Mining Conference of the Colorado Mining Association, Denver, Colorado, February 7, 1959. Thank you for your invitation to discuss here today some of the aspects of nuclear explosions in mining and mineral industries. I should like this afternoon to dwell briefly upon: (1) The phenology of a nuclear explosion underground. What happens; with what energies are we concerned, and what may be the scientific and industrial results of such an explosion? (2) The … more
Date: February 7, 1959
Creator: Rabb, David D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation Of The Shock Wave From An Underground Nuclear Explosion In Granite

Description: In any underground nuclear explosion, the shock front that propagates from the shot point carries with it energy from the explosion, and distributes this energy by doing work on the surrounding material. In the process, the material undergoes changes in both its physical and mechanical states. If enough energy is deposited in the material, it will vaporize or melt thus changing its physical state, or cause it to crush or crack. During the past few years, special computer codes have been develop… more
Date: April 24, 1964
Creator: Butkovich, Theodore R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deposition Of Thermal Energy By Nuclear Explosives

Description: A fraction of the energy released by the underground detonation of nuclear explosives is locally deposited as residual thermal energy. An accurate prediction of this usable fraction of the energy released is necessary to evaluate the feasibility of several of the proposed projects in the Plowshare Program. This paper will present a summary of the available data on residual thermal energy from nuclear detonations in three different geological media: tuff, halite, and granodiorite.
Date: April 6, 1964
Creator: Heckman, Richard A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Hobo : Densities and Velocities Measured on Specimens from Instrument and Shot Holes

Description: Abstracts. Results are given for bulk-density and pulse-velocity measurements performed on specimens of the Project Hobo medium. Test techniques, sample handling, and specimen preparation are described. Values are tabulated in terms of sample origin and geological identity.
Date: May 2, 1960
Creator: Guido, Raymond S. & Warner, Stanley E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Hobo : Shear and Compressional Velocity Measurements

Description: Abstract. Three groups of 100 foot holes were drilled vertically downward from the floor of U 12e main tunnel and U 123.03 drift at the Nevada Test Site. Distances between holes in each group varied from 13 to 375 feet. One hole in each group was used a a 'shot hole'; the others for seismometers to records the energy generated in the 'shot hole'. Two types of recordings were made. One for dilatational or longitudinal "P" waves and one for transverse or shear "S" waves. Simultaneous recordings w… more
Date: May 1960
Creator: Swain, R. J.; Heald, C. L. & Snodgrass, D. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Cowboy : Physical Properties of Salt Samples

Description: The purpose of Project Cowboy was to investigate the seismic signals generated by chemical explosions in underground cavities, with particular emphasis on the possibility of decoupling of these signals from the surrounding media. The project site was the Carey Salt Company salt mine, located approximately five miles west of Winnfield, Louisiana. The tests were run during fiscal year 1960. This report presents the results of tests performed on specimens from the samples of salt taken in the area. more
Date: July 15, 1960
Creator: Guido, Raymond S. & Warner, Stanley E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plowshare Program : Peaceful Uses for Nuclear Explosives

Description: The concept of thermonuclear explosives as a potentially cheap and almost inexhaustible energy source for mankind's non military needs has for several years been under active consideration at the Lawrence Radiation Laboratory. Many of the proposed peaceful applications involve underground nuclear explosions, and several experiments at the AEC Nevada Test Site have provided valuable insight into the phenomenology of such explosions. Among the possible uses currently under consideration are excav… more
Date: July 25, 1960
Creator: Lombard, David B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Cowboy : Final Report : Seismic Decoupling for Explosions in Spherical Cavities

Description: A series paired explosions in a salt mine near Winnfield, Louisiana, has been conducted to test a theory by A.L. Latter concerning seismic decoupling by underground cavities. The theory predicted a decoupling of 132 Free-field and surface measurements from an explosion in either a 6-ft- or a 15-ft-radius spherical cavity were compared with similar measurements from a completely tamped explosion of equal size. Shot sizes were from 20 pounds up to a ton. Surface measurements were made out to 100 … more
Date: August 1960
Creator: Adams, William M. & Allen, DeWitt C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Cowboy : Use of Large Cavities to Reduce Seismic Waves From Underground Explosions

Description: This technical report analyzes an experiment designed to test the theory of seismic decoupling of underground explosives proposed by Latter, LeLevier, Martinelli, and McMillan [1959]. The theory calculated the amplitude of a 1.7-kiloton nuclear explosive in a hole in salt and compares it to the measured value of the 1.7-kt Rainier shot in tuff at the same distance. A decoupling factor of about 300 resulted. The experiment, called Cowboy, was designed to test the decoupling principle by carryin… more
Date: September 29, 1960
Creator: Herbst, Roland F.; Werth, Glenn C. & Springer, Donald L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Cowboy : Close-in Pressure Measurements with Tourmaline Crystals on Tamped Detonations

Description: In January and February, 1960, Lawrence Radiation Laboratory personnel conducted a series of experiments in Phase II of Project Cowboy in which tourmaline crystal transducers, located very close (3 to 50 feet) to tamped high explosive detonations, detected dynamic elasto-plastic stress waves generated in salt. The detonations occurred 110 feet below the 800-foot working level of the Carey Salt Mine, near Winnfield, Louisiana. These experiments were designed to measure dynamic stress conditions … more
Date: November 7, 1960
Creator: Lindsay, William F.; Heusinkveld, Myron; Villaire, Alfred E. & Krause, Otto H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible Applications of Nuclear Energy to the Mining Industry

Description: American Mining Congress 9/24/58. Summary. Results of a recent underground test by the Atomic Energy Commission indicate possible applications of nuclear energy in mining and allied industries. The safety, feasibility and economy of nuclear detonations have been demonstrated and further considerations reveal a number of interesting situations which might lend themselves to the use of this new type of explosive. Possible applications include stripping, crushing, quarrying, and the exploitation … more
Date: August 15, 1958
Creator: Rabb, David D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Decoupling Concepts and Project Cowboy

Description: This paper for the Project Vela Technical Symposium is intended to be a brief resume of the principle results of the Cowboy program. The material is taken from a report entitled "Use of Large Cavities to Reduce Seismic Waves from Underground Explosions" by Herbat, Werth, and Spring (1960). As a result, no effect is made to justify each step in the analysis; reference should be made to the complete report.
Date: October 11, 1960
Creator: Werth, Glenn C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Operation Pre-Gnome: Seismic Data from Natural Phenomena and High-Explosive Tests Near Carlsbad, New Mexico

Description: Formulas derived from earlier work satisfactorily predicted low frequency ground effects resulting from the Pre-Gnome explosions, but they not predict high accelerations associated with high frequency ground waves. The Pre-Gnome experiments taken since indicated that accelerations and ground amplitudes are proportional to the explosive charge, but physical conditions limit extrapolation on this basis to relatively low yields. Predicted accelerations resulting from the 10 kt Gnome explosion in p… more
Date: January 12, 1960
Creator: Carder, Dean S.; Murphy, L. M.; Cloud, W. K. & Pearce, T. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Frequency of Earthquakes for Selected Areas in the Western United States for the Period 1945-59

Description: Report presenting earthquake frequency data for the period 1945-59 for the states of California, Nevada, Washington, Montana, Wyoming, Utah, Arizona, and New Mexico. In addition it presents earthquake-frequency data for 100-mile square areas in California (White Wolf fault, Lost Valley, and Wonderland-of-Rocks), Nevada (Fallon), Washington (area 1), and Montana-Wyoming (areas 1, 2, and 3). (p. 5)
Date: February 1961
Creator: Twenhofel, W. S. (William Stephens), 1918-; Black, R. A. & Balsinger, D. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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