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Longwall Gate Road Stability in a Steeply Pitching Thick Coal Seam with a Weak Roof
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.
System:
The UNT Digital Library
Geology of Eocene Rocks and Oil Yields of Green River Oil Shales on Part of Kinney Rim, Washakie Basin, Wyoming
Report issued by the Bureau of Mines discussing the geology and oil-yield of the Green River in the Washakie Basin, Wyoming. Evaluations of the geology and oil-shale resources of the area are presented. This report includes tables, maps, illustrations, and photographs.
Date:
1973
Creator:
Trudell, Laurence G.; Roehler, Henry W. & Smith, John Ward
System:
The UNT Digital Library
Oil Yields and Stratigraphy of the Green River Formation's Tipton Member at Bureau of Mines Sites Near Green River, Wyoming
Report issued by the Bureau of Mines over the oil yields at the Green River. The average oil yields from the area are discussed. This report includes tables, and illustrations.
Date:
1972
Creator:
Dana, George F. & Smith, John Ward
System:
The UNT Digital Library
Strippable Coal Reserves of Wyoming: Location, Tonnage, and Characteristics of Coal and Overburden
Report issued by the U.S. Bureau of Mines discussing coal reserves in Wyoming. Geology, production, and location of strippable reserves are presented. This report includes maps, tables, and illustrations.
Date:
1972
Creator:
Smith, Joseph Blake; Ayler, Maynard F.; Knox, Clinton C. & Pollard, Benjamin C.
System:
The UNT Digital Library
Mining Practices at Four Uranium Properties in the Gas Hills, Wyoming
Report issued by the Bureau of Mines discussing the mining practices at Gas Hills, Wyoming. As stated in the abstract, "this report, based on information made available by four uranium-producing companies, describes the geology, exploration, open-pit development and mining, and shaft sinking in the Gas Hills uranium district of Wyoming" (p. 1). This report includes tables, maps, illustrations, and photographs.
Date:
1963
Creator:
Everett, F. D.
System:
The UNT Digital Library
Magnetite and Ilmenite Resources, Iron Mountain Area, Albany County, Wyoming
Report issued by the U.S. Bureau of Mines discussing magnetite and ilmenite mining methods and practices. As stated in the introduction, "this report summarizes the exploration of the titaniferous iron deposits in the Iron Mountain area, Albany County, Wyo." (p. 1). This report includes maps, tables, illustrations, and photographs.
Date:
1961
Creator:
Dow, Vernon T.
System:
The UNT Digital Library
Reconnaissance of Titaniferous Sandstone Deposits of Utah, Wyoming, New Mexico, and Colorado
Report issued by the Bureau of Mines over heavy sandstone deposits in the Four-State area of the U.S. Details of the geology and an estimate of resources are presented. This report includes tables, maps, and illustrations.
Date:
1961
Creator:
Dow, Vernon T. & Batty, J. Vance
System:
The UNT Digital Library
Petroleum and Natural Gas Fields in Wyoming
Report issued by the Bureau of Mines over the oil and gas fields of Wyoming. As stated in the summary, "this study contains individual reports on 271 oil and gas fields in Wyoming. The location of each field is given; and, where available, maps of the fields, surface formations, and elevations" (p. 1).
Date:
1960
Creator:
Biggs, Paul & Espach, Ralph H.
System:
The UNT Digital Library
Operation of Experimental Plant for Producing Alumina from Anorthosite
From Preface: "This Bulletin provides a permanent record of the operation of an experimental alumina plant by the Bureau of Mines at Laramine, Wyo. The broad purpose of this experimental program was to appraise the technologic and economic feasibility of producing aluminum from nonbauxitic ores."
Date:
1959
Creator:
St. Clair, Hillary W.; Elkins, Douglas A.; Shibler, Bertram K.; Mahan, Warren M.; Merritt, Robert C.; Howcroft, Mark R. et al.
System:
The UNT Digital Library
Investigation of Tuffs Near Lysite, Wyoming for Selenium
Report issued by the Bureau of Mines over studies conducted on seleniferous tuff deposits in Wyoming. Results of the tuff samples obtained are presented. This report includes tables, maps, photographs, and illustrations.
Date:
January 1957
Creator:
Everett, Floyd D. & Bauerle, L. C.
System:
The UNT Digital Library
Low-Temperature Carbonization Assays of North American Coals
Report issued by the Bureau of Mines over studies conducted on low-temperature carbonization of coal. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.
Date:
1957
Creator:
Selvig, W. A. & Ode, W. H.
System:
The UNT Digital Library
Flood Prevention in Anthracite Mines: Anthracite Region of Pennsylvania, Projects Numbers 4 and 5
From Scope of Reports: "This report covers the following: (a) A brief description of the work proposed under Projects Nos. 4 and 5; (b) the topography, geology and hydrology of the area into which the sections of the proposed tunnel are to be driven; (c) plans, costs, and construction schedules of the projects; and (d) conclusions and recommendations."
Date:
1956
Creator:
Ash, S. H. (Simon Harry), b. 1889; Dierks, H. A. & Kennedy, D. O.
System:
The UNT Digital Library
Mineral Facts and Problems, 1956
Report issued by the Bureau of Mines over mineral characteristics, uses, and problems. Descriptions of common minerals and their uses are presented and discussed. This report includes tables, maps, and illustrations.
Date:
1956
Creator:
United States. Bureau of Mines.
System:
The UNT Digital Library
Flood Prevention in Anthracite Mines, Northern Field: Anthracite Region of Pennsylvania, Project Number 3 (Wyoming)
From Scope of Report: "This report covers the following: (a) A brief description of the work contemplated under Project No. 3 as an integral part of the Conowingo tunnel system; (b) an economic discussion of the area affected; (c) the geology and hydrology of the Northern field, including the Wyoming Basin; (d) the basic problem, plans, and costs, and the construction schedule of the project; (e) an economic analysis and a justification for the project; (f) recommendations and cooperation of local interests; and (g) final conclusions."
Date:
1955
Creator:
Ash, S. H. (Simon Harry), b. 1889; Dierks, H. A.; Kynor, H. D.; Lesser, W. H.; Miller, P. S. & Romischer, W. M.
System:
The UNT Digital Library
Barrier Pillars in Wyoming Basin, Northern Field: Anthracite Region of Pennsylvania
From Introduction: "The purpose of this report is to furnish factual data on barrier pillars that enter into the water problem of the Wyoming Basin; these data will, in turn, be helpful in solving the anthracite-mine-water problem of the Northern field."
Date:
1954
Creator:
Ash, S. H. (Simon Harry), b. 1889
System:
The UNT Digital Library
Early Operations of the Hydrogenation Demonstration Plant, Using Rock Springs, Wyoming Coal
Report issued by the Bureau of Mines over studies conducted on a coal-hydrogenation demonstration plant. The early operations of the demonstration plant are discussed. This report includes tables, illustrations, and photographs.
Date:
May 1953
Creator:
Clarke, Edwin A.; Chaffee, C. C. & Hirst, L. L.
System:
The UNT Digital Library
Analyses of Tipple and Delivered Samples of Coal: (Collected During the Fiscal Years 1948 to 1950 Inclusive)
From Forward: "This bulletin is the first of a new series, which includes analyses of only tipple and delivered coal. It covers samples collected throughout the United States from July 1, 1947 to June 30, 1950 (fiscal years 1948-50). It is planned that future publications of this series will cover a period of one fiscal year only and be issued as soon as possible after June 30 of each year."
Date:
1953
Creator:
Snyder, N. H. & Aresco, S. J.
System:
The UNT Digital Library
Synthetic Liquid Fuels: Annual Report of the Secretary of the Interior for 1952; Part 2 - Oil from Oil Shale
Report issued by the Bureau of Mines over an annual study of synthetic liquid fuel production. Results of the annual study are discussed. This report includes maps, tables, illustrations, and photographs.
Date:
January 1953
Creator:
unknown
System:
The UNT Digital Library
Thermal Solution and Hydrogenation of Green River Oil Shale: Experimental Investigations and Bibliography
From Introduction: "This so-called thermal-solution process and a modification of it, wherein the conversion is carried out under a high partial pressure of hydrogen, have been studied at the Petroleum and Oil-Shale Experiment Station, Laramie, Wyo., to determine their applicability to Green River oil shale. The results of this work are presented in this report."
Date:
1953
Creator:
Jensen, H. B.; Barnet, W. I. & Murphy, W. I. R.
System:
The UNT Digital Library
Synthetic Liquid Fuels: Annual Report of the Secretary of the Interior for 1951; Part 1 - Oil from Coal
Report issued by the Bureau of Mines over an annual study of synthetic liquid fuel production. Results of the annual study are presented and discussed. This report includes maps, tables, illustrations, and photographs.
Date:
July 1952
Creator:
unknown
System:
The UNT Digital Library
Coal Deposit, Coal Creek District, Gunnison County Colorado: Reserves, Coking Properties, and Petrographic and Chemical Characteristics
From Introduction: "A preliminary report of the work was published in April 1947, and this bulletin supplements Report of Investigations 4104 and describes the results of the entire investigation."
Date:
1952
Creator:
Toenges, Albert L.; Turnbull, Louis A.; Davis, J. D.; Reynolds, D. A.; Parks, B. C.; Cooper, H. M. et al.
System:
The UNT Digital Library
The Synthetic Liquid Fuel Potential of Wyoming/Idaho
Report documenting the suitability of Wyoming and Idaho for plant locations to produce synthetic liquid fuels, based on raw materials, water sources, and local interest.
Date:
September 10, 1951
Creator:
Ford, Bacon, and Davis
System:
The UNT Digital Library
Variable Characteristics of the Oil in the Tensleep Sandstone Reservoir, Elk Basin Field, Wyoming and Montana
Report issued by the U.S. Bureau of Mines on the characteristics of oil obtained from the Tensleep Sandstone Reservoir. The samples collected are analyzed for physical characteristics and presented in tables and graphs. The report also includes a map.
Date:
April 1951
Creator:
Espach, Ralph H. & Fry, Joseph
System:
The UNT Digital Library
Investigation of Casper Mountain Chromite Deposits, Natrona County, Wyoming
Report issued by the Bureau of Mines over a large chromite deposit on Casper Mountain. Description of the deposit is listed. This report includes tables, maps, and illustrations.
Date:
August 1949
Creator:
Horton, Frederick W. & Allsman, Paul T.
System:
The UNT Digital Library