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Longwall Gate Road Stability in a Steeply Pitching Thick Coal Seam with a Weak Roof

Description: The U.S. Bureau of Mines (USBM) conducted ground pressure analysis of a wide abutment-type chain pillar in a two-entry gate road of a Western U.S. coal mine with an extremely weak immediate roof. About 15 m of fragile, low-strength mudstone lies between the seam and the lowest competent roof member. Three- and two-entry gate road designs with several pillar sizes and various secondary support systems have been employed to improve tailgate-entry stability, with varying results. This report discusses gate road layout and performance and secondary support effectiveness. The results of the pillar pressure study are compared to pillar loading predicted by a widely used pillar design method and to similar studies in other mines. A stability evaluation of the most recent longwall headgate, using the USBM Analysis of Longwall Pillar Stability (ALPS) method, indicates marginal stability in first-panel mining and instability in second-panel mining. The ALPS method and the USBM Coal Mine Roof Rating system are used to evaluate tailgate-mining stability of the previous gate roads and to determine pillar and entry width and top coal thickness criteria for tailgate stability in future panels.
Date: 1995
Creator: Barron, Lance R. & DeMarco, Matthew J.

Gravity and Aeromagnetic Studies of the Powder River Basin and Surrounding Areas, Southeastern Montana, Northeastern Wyoming, and Western South Dakota

Description: From abstract: This report contains complete Bouguer anomaly, isostatic residual anomaly, and horizontal gradient anomaly gravity maps of the Powder River Basin and surrounding areas in southeastern Montana, northeastern Wyoming, and western South Dakota were compiled using gravity data from 21,528 stations. A total-intensity anomaly aeromagnetic map with 3 mile spaced east-west flight-lines is also presented. Also included is an analysis of these maps and data, focusing on gravity and aeromagnetic studies.
Date: 1994
Creator: Robbins, Stephen L.

Mineral Resources of the McCullough Peaks Wilderness Study Area, Park County, Wyoming

Description: From abstract: The McCullough Peaks Wilderness Study Area (WY-010-335) is located near the western edge of the Bighorn Basin, Park County, Wyoming. The area is about 10 miles northeast of Cody. Mineral and energy resource assessment of the McCullough Peaks Wilderness Study Area indicates a total of 52 million tons of measured and indicated subbituminous coal resources.
Date: 1990
Creator: Hadley, Donald G.; Ryder, Robert T.; Hill, Randall H. & Kulik, Dolores M.

Mineral Resources of the Bobcat Draw Badlands Wilderness Study Area, Big Horn and Washakie Counties, Wyoming

Description: Abstract: The Bobcat Draw (WY-010-126) Wilderness Study Area includes about 17,150 acres and is located about 45 mi (miles) by road west of Worland in the Bighorn basin. The arid landscape comprises treeless uplands drained by intermittent streams. No identified resources are in the Bobcat Draw Wilderness Study Area. Most of the area is currently under lease for oil and gas. The study area has a high potential for resources of oil and gas and a high potential for subeconomic resources of deeply buried coal. The potential for a deep-seated geothermal energy resource is moderate. The resource potential for oil shale and metals, including uranium, is low.
Date: 1989
Creator: Gibbons, Anthony B.; Carlson, Robert R.; Kulik, Dolores M. & Lundby, William

Mineral Resources of the Medicine Lodge, Alkali Creek, and Trapper Creek Wilderness Study Areas, Big Horn County, Wyoming

Description: From introduction: This report presents an evaluation of the mineral endowment (identified resources and mineral resource potential) of the study area and is the product of several separate studies by the U.S. Bureau of Mines (USBM) and the U.S. Geological Survey (USGS). Identified resources are classified according to a modification of the system described by McKelvey (1972) and the USBM and USGS (1980), which is shown in the Appendix. Identified resources are studied by the USBM. Mineral resource potential is the likelihood of occurrence of undiscovered metals and nonmetals, industrial rocks and minerals, and of undiscovered energy sources (coal, oil, gas, oil shale, tar, and geothermal sources). It is classified according to the system of Goudarzi (1984) and is shown in the Appendix. Undiscovered resources are studied by the USGS.
Date: 1989
Creator: Hosterman, John W.; Hill, Randall H.; Kulik, Dolores M. & Gese, Diann D.

Mineral Resources of the Honeycomb Buttes Wilderness Study Area, Fremont and Sweetwater Counties, Wyoming

Description: From summary: This report includes field investigations to evaluate the mineral resource potential of the Honeycomb Buttes were conducted during the summer of 1984. Geologic mapping, geochemical sampling, geophysical surveys, stratigraphic and sedimentological studies, and surveys of prospects delineated areas of very low grade placer gold deposits in terrace gravels and low and moderate resource potential for additional similar undiscovered placer gold deposits, low and moderate resource potential for small uranium deposits, moderate resource potential for accumulation of oil and gas, and low resource potential for coal and oil shale.
Date: 1987
Creator: Patterson, Charles G.; Kulik, D. M.; Loen, Jeffrey S.; Koesterer, M. E. & Scott, David C.

Mineral Resources of the Sand Dunes Wilderness Study Area, Sweetwater County, Wyoming

Description: From summary: In this report the area studied is referred to as the "wilderness study area" or the "study area". Investigations of mineral occurrences in and near the wilderness study area during 1984 and 1985 indicated high mineral resource potential for undiscovered deposits of coal, moderate potential of oil shale and natural gas, low potential for oil, and identified resources of claystone, shale, and sand.
Date: 1987
Creator: Merewether, E. A.; Kulik, D. M. & Ryan, George S.

Uranium Hydrogeochemical and Stream Sediment Reconnaissance Data Release for the Cody NTMS Quadrangle, Wyoming, Including Concentrations of Forty-Two Additional Elements

Description: "This report contains data for samples collected during a geochemical survey for uranium in the Cody National Topographic Map Series (NTMS) quadrangle, Wyoming, by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR). [...] Totals of 627 water and 1482 sediment samples were collected from 1529 locations at a nominal density of one location per 10 km2. Water samples were collected from streams, springs, and wells, and sediment samples were collected from streams and springs. Most samples were collected by two private contractors in the summers of 1976 and 1977" (p. 1).
Date: August 1980
Creator: Bolivar, Stephen L.

Uranium Hydrogeochemical and Stream Sediment Reconnaissance of the Casper NTMS Quadrangle, Wyoming, Including Concentrations of Forty-Two Additional Elements

Description: Report of uranium and thorium findings from a reconnaissance of the Casper NTMS quadrangle through water and sediment samples analyzed for uranium elements by delayed neutron counting and fluorometry, thorium, and 41 additional elements by neutron activation analysis, x-ray fluorescence, and arc-source emission spectroscopy.
Date: June 1980
Creator: LaDelfe, Carol M.

Uranium Hydrogeochemical and Stream Sediment Reconnaissance of the Arminto NTMS Quadrangle, Wyoming, Including Concentrations of Forty-Three Additional Elements

Description: This report presents uranium and other elemental data as part of the National Uranium Resource Evaluation which is designed to provide improved estimates of the availability and economics of nuclear fuel resources and to make available to industry information for use in the development and production of uranium resources.
Date: November 1979
Creator: Morgan, Terrance L.

Effect on Sediment Yield and Water Quality of a Nonrehabilitated Surface Coal Mine in North-Central Wyoming

Description: From introduction: The purpose of this study was to determine the magnitude of some effects of an abandoned surface coal mine on the hydrologic environment. Specific objectives were (1) to define areas of erosion and deposition; (2) to determine if the sediment yield from an undisturbed drainage basin was less than that from a drainage basin partly disturbed by mining activity; and (3) to determine if there were differences in chemical composition of hillslope materials, sediment, and pond water in the two basins.
Date: March 1979
Creator: Ringen, Bruce H.; Shown, Lynn M.; Hadley, Richard F. & Hinkley, Todd K.

Hydrogeologic Features of the Alluvial Deposits in the Greybull River Valley, Bighorn Basin, Wyoming

Description: Abstract: The alluvial aquifer along the Greybull River consists principally of the Greybull terrace deposits and the flood-plain alluvium but also includes the Burlington terrace deposits and the flood-plain alluvium but also includes the Burlington terrace deposits east of Burlington, the McKinnie terrace, and the younger, generally undissected alluvial-fan deposits. Well-log data and 18 surface-resistivity measurements at four localities indicate that the thickness of the alluvial aquifer is as much as 60 feet thick only near Burlington and Otto. The most favorable area for development of ground water from the alluvial aquifer is near Burlington and Otto where relatively large amounts of water can be obtained from the Greybull terrace deposits and the flood-plain alluvium. Elsewhere, the deposits of the alluvial aquifer yield only small amounts of water to wells.
Date: 1979
Creator: Cooley, Maurice E. & Head, William J.

A Review of the Physical and Engineering Properties of Raw and Retorted Oil Shales from the Green River Formation: Final Report

Description: "This report summarizes published geotechnical properties of raw and retorted oil shales from the Green River Formation. Basic physical properties including gradation, specific gravity and Atterberg limits and engineering properties including compaction, permeability, settlement, soundness, and strength are summarized and discussed. Where appropriate, conclusions are drawn about the suitability of retorted oil shales as a geotechnical construction material. Appendix A discusses three retorting processes used to extract oil from oil shale" (abstract, para. 2-3).
Date: March 1978
Creator: Snethen, Donald; Farrell, Warren J. & Townsend, Frank C.

An Analysis of Salinity in Streams of the Green River Basin

Description: Abstract: Dissolved-solids concentrations and loads can be estimated from streamflow records using a regression model derived from chemical analyses of monthly samples. The model takes seasonal effects into account by the inclusion of simple-harmonic time functions. Monthly mean dissolved-solids loads simulated for a 6-year period at U.S. Geological Survey water-quality stations in the Green River Basin of Wyoming agree closely with corresponding loads estimated from daily specific-conductance records. In a demonstration of uses of the model, an average gain of 114,000 tons of dissolved solids per year was estimated for 6-year period in a 70-mile reach of the Green River from Fontemelle Reservoir to the town of Green River, including the lower 30-mile reach of the Big Sandy River.
Date: October 1977
Creator: DeLong, Lewis L.

Hydrologic Evaluation of the Arikaree Formation Near Lusk, Niobrara and Goshen Counties, Wyoming

Description: From purpose and scope: The purposes of this investigation are (1) to define the ground-water system in the Arikaree Formation, (2) to determine the hydrologic cause-and-effect relationships resulting from the current ground-water development, and (3) to provide a means of indicating the hydrologic effect of future ground-water development.
Date: October 1977
Creator: Crist, Marvin A.