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    DisciplineGraduate College (30)
    Mining and Geological Engineering (30)
    AuthorsAbdullatif, Abdullatif Ahmad, 1937- (1)Al-Hazzaa, Abdullah Fahad, 1941- (1)Call, Richard Drake, 1934- (1)Carrigan, Francis John, 1941- (1)Cummings, Grant Richard (1)Deakin, Frank Apland. (1)Eliopulos, George James, 1949- (1)Fernandez, Joseph A. (Joseph Anthony), 1952- (1)Glass, C. E. (1)Gould, James Edward, 1943- (1)View MoreTypes
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    Thesis-Reproduction (electronic) (25)Dissertation-Reproduction (electronic) (5)Thesis (1)

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    LONG-TERM HIGHWALL STABILITY IN THE NORTHWESTERN POWDER RIVER BASIN, WYOMING AND MONTANA

    Smith, William K (The University of Arizona., 1980)
    Time-dependent behavior of natural and excavated slopes in sedimentary rocks is a subject that is poorly understood at present but that is now an important consideration in the design, operation, and reclamation of energy-extraction facilities, in part because of the environmental considerations mandated by the Surface Mining Control and Reclamation Act of 1977 (Public Law 95-87). A slide in an abandoned, unreclaimed strip mine northwest of Sheridan, Wyoming, has been analyzed as an example of a long-term slope failure in the region. This slide occurred in early 1975, some 20 years after cessation of mining. This investigation used Spencer's limiting equilibrium method and an elastic-plastic finite element method incorporating the Drucker-Prager yield criterion. This slide was found to fit the model for time-dependent failure proposed by Nelson and Thompson (1977) in which the time to failure is related to Skempton's residual factor. The Nelson-Thompson hypothesis is extended for use with the three-dimensional Drucker-Prager yield criterion. The residual factor (R) may be computed from the factors of safety with respect to peak (F(p)) and residual (Fᵣ) material properties, using either the Mohr-Coulomb or Drucker-Prager criterion, by the relationship R = [(F(p) - 1)/(F(p)-Fᵣ)] At the present time, the Spencer limiting equilibrium analysis is a more usable tool for ordinary slope design than the elastic-plastic finite element analysis because of the speed, simplicity, and ease of including the effects of ground water in the Spencer analysis.
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    Preliminary investigation and exploration in the Rancho El Rodeo area, Sonora, Mexico

    Potucek, Tony Lee, 1951- (The University of Arizona., 1978)
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    Geological engineering survey of the Tucson Basin, Pima County, Arizona

    Tanenbaum, Ronald Joel, 1946- (The University of Arizona., 1972)
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    Lineation analysis from aerial photographs of the Sierrita Mountains, Pima County, Arizona

    Gould, James Edward, 1943- (The University of Arizona., 1973)
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    Exploration characteristics of native copper mineralization in the Silver Bell andesite at Las Guijas, Pima County, Arizona

    Hirt, William Carl (The University of Arizona., 1978)
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    Origin and environment of mineralization at the Siskon Mine, Siskiyou County, California

    Hackman, David Brent, 1942- (The University of Arizona., 1971)
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    Influence of jointing on engineering properties of San Manuel mine rock

    Kendorski, F. S. (The University of Arizona., 1971)
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    A geologic investigation of contact metamorphic deposits in the Coyote Mountains, Pima County, Arizona

    Carrigan, Francis John, 1941- (The University of Arizona., 1971)
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    ANALYSIS OF GEOLOGIC STRUCTURE FOR OPEN PIT SLOPE DESIGN

    Call, Richard Drake, 1934- (The University of Arizona., 1972)
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    Economic geology of the Alamos Mining District, Sonora, Mexico

    Vazquez Perez, Adalberto, 1944- (The University of Arizona., 1975)
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