Technical Report Archive & Image Library (TRAIL) - 424 Matching Results
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- Experiment in Underground Gasification of Coal, Gorgas, Alabama
- Report issued by the Bureau of Mines over studies and experiments conducted on underground coal gasification. The results of the experiments are listed. Description and analysis of the coal and coal bed are also presented. This report includes tables, maps, photographs, and illustrations.
- Exploration for Lead and Zinc at the Madonna Mine, Monarch Mining District, Chaffee County, Colorado
- Report issued by the Bureau of Mines over exploration of the lead and zinc deposits of the Madonna Mine. Descriptions of the deposits are presented. This report includes tables, maps, and illustrations.
- Exploration of Lead-Zinc Deposits in the Ross Basin-Lake Como Area, San Juan County, Colorado
- Report issued by the Bureau of Mines over exploration of lead-zinc deposits in Colorado. The geology, location, and physical features of the deposits are discussed. This report includes tables, maps, photographs, and illustrations.
- Exploration of Red Mountain Chromite Deposits, Kenai Peninsula, Alaska
- Report issued by the U.S. Bureau of Mines investigating the chromite deposits of Red Mountain on Kenai Peninsula, Alaska. Research methods include surface sampling and core drilling. The report includes tables, maps, and illustrations.
- Exploration of Stiner and Bunch Hollow Zinc Properties, Powell River Area, Union and Claiborne Counties, Tennessee
- Report issued by the U.S. Bureau of Mines on the exploration of zinc ore deposits surrounding the Powell River area in Tennessee. Drilling methods and ore concentrates are presented. This report includes tables, and maps.
- Exploration of the Avon Mica District, Latah County, Idaho
- Report issued by the U.S. Bureau of Mines on the investigations conducted on the mica deposits found in Latah County, Idaho. Characteristics and properties of the mica deposits are listed. This report includes tables, and maps.
- Exploration of the Mount Hope Mine, Eureka County, Nevada
- Report issued by the U.S. Bureau of Mines on the exploration of the Mount Hope mine. Analysis of samples obtained from core-drilling are listed. This report includes tables, maps, and illustrations.
- Explosions of Ammonium Nitrate Fertilizer on Board the S. S. Grandcamp and S. S. High Flyer at Texas City, Texas, April 16, 17, 1947
- Report issued by the Bureau of Mines regarding explosions that took place on two separate cargo ships in 1947. The observations, data collected, and testing done during investigations of the disaster are presented. This report includes photographs, and illustrations.
- Extent and Availability of Natural Gas Reserves in Michigan "Stray" Sandstone Horizon of Central Michigan
- Report issued by the U.S. Bureau of Mines on studies of the known natural gas reserves in central Michigan sandstone deposits. The geology and methods used to estimate the reserves are presented. This report includes tables, illustrations, and maps.
- The Fabrication of Arc-Melted Ingots of Titanium and Titanium-Manganese Alloys into Plate
- Report issued by the Bureau of Mines over production of titanium-manganese alloy plates from arc-melted ingots. As stated in the summary, "for the alloy material, transformation data were obtained, and their age-hardening characteristics were studied. The temperature-impact relationship was established for rolled sections from all three ingots" (p. 1). This report includes tables, graphs, and photographs.
- Factors Influencing Flow of Natural Gas Through High-Pressure Transmission Lines
- Report issued by the U.S. Bureau of Mines on the effects of different operating conditions on high-pressure natural gas pipelines. Analysis of past and current studies on natural gas transmission are presented. This report includes tables, graphs, and an illustration.
- Field Demonstration of Two Pneumatic Backfilling Technologies
- Abstract: This U.S. Bureau of Mines (USBM) report summarizes a field demonstration of pneumatic backfiling technologies conducted at the abandoned Hillside Coal and Iron Slope in Vandling, PA. Researchers demonstrated tro pneumatic backfilling technologies recently developed under the USBM's Abandoned Mine Reclamation Research Program, the Pneumatic Pipefeeder and the High-Efficiency Ejector. Both systems had previously been evaluated at the USBM's subsidence abatement investigation laboratory near Fairchance, PA. The objective of the demonstration was to fill 100% of the abandoned tunnel with backfill stone to prevent further subsidence. The Pneumatic Pipefeeder was used for 21 days, at a rate of 63 to 124 t/d (69 to 136 st/d), to fill 88% of the tunnel. The High-Efficiency Ejector was used for 2 days, at a rate of 125 to 132 t/d (138 to 146 st/d) to fill the remaining 12% of the tunnel. The backfill placed by both systems was tightly compacted. The major problem encountered was wear on the polyethylene pipeline from the abrasion of the high-velocity backfill. The use of heavier steel pipe minimized the problem. A cost analysis for the entire project is given.
- Fischer-Tropsch Synthesis in a Fluidized Catalyst Reactor with a Nitrided, Fused-Iron Catalyst
- Report issued by the Bureau of Mines over testing conducted on "the synthesis of liquid fuels from carbon monoxide and hydrogen by Fischer-Tropsch synthesis" (p. 1). Descriptions of the equipment and methods used are presented. The results are also discussed. This report includes tables, graphs, and illustrations.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: A Preliminary Study
- Report issued by the Bureau of Mines over flood-prevention methods at Pennsylvania anthracite mines. The flood-prevention projects are discussed. This report includes tables, maps, photographs, and illustrations.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: Progress Report for 1945
- Report issued by the Bureau of Mines over studies conducted on flood-prevention developed for mine systems. A history of flood prevention procedures as well as updated flood-prevention is presented. This report includes tables, graphs, maps, photographs, and illustrations.
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: Progress Report for Fiscal Year Ended June 30, 1947
- Report issued by the Bureau of Mines over the progress made on flood prevention in anthracite mines. As stated in the report, "the broad objective of the investigative work was to obtain factual data on: 1. anthracite reserves of Pennsylvania, 2. underground water pools, 3. barrier pillars, 4. the "buried valley" of the Susquehanna River, and 5. infiltration of surface water into underground mine workings" (p. 4). This report includes tables, graphs, maps, photographs, and illustrations.
- Flow Characteristics, Composition, and Some Liquid-Phase Properties of Hydrocarbon Fluids From a "Combination" Well
- Report issued by the U.S. Bureau of Mines on the properties of fluids produced from combination wells. The characteristics of test results of these fluids are described and presented. This report includes tables, graphs, illustrations, and photographs.
- Foam-Drive Process for Increasing the Recovery of Oil
- Report issued by the Bureau of Mines over tests conducted on the foam-drive process of oil-recovery. Discussion of the foam-drive process is presented. This report includes tables, graphs, and illustrations.
- Fundamental Flashback, Blowoff, and Yellow-Tip Limits of Fuel Gas-Air Mixtures
- Report issued by the Bureau of Mines over experiments conducted on fuel-gas mixtures. The results of these experiments are presented. This report includes tables, graphs, illustrations, and photographs.
- Further Corrosion Tests on Materials in Regenerative Air Preheaters
- Report issued by the Bureau of Mines over tests conducted on regenerative air preheaters. The corrosion rates of different materials are presented. This report includes tables, graphs, illustrations, and photographs.
- The Future of Birmingham Red Iron Ore, Jefferson County, Alabama
- Report issued by the U.S. Bureau of Mines regarding the restudy of iron-ore reserves in the Birmingham area to determine where increased production may be obtained in the area if and when required. The report includes tables, graphs, pictures and a map.
- Future Timber Supply for Coal Mines: What One Company is Doing
- Report discussing a case study of a coal company in Western Pennsylvania to show how mining companies might decrease their timber bills.
- Gas Injection into the McClosky Limestone in the Griffin and New Harmony Oil Fields, Indiana and Illinois
- Report issued by the U.S. Bureau of Mines conducted a study on the injection of gas into the McClosky limestone in northern Illinois and Indiana. The resulting increases in oil and gas production from this area are presented. The report includes maps, graphs, tables, and illustrations.
- Geochemical Investigations for Gold, Antimony, and Silver at Stibnite, Idaho
- Report issued by the Bureau of Mines on the geochemical anomalies found in the gold-antimony deposits near Stibnite, Idaho. Many samples were collected and tested through an atomic absorption method. This report includes a map.
- Geologic Factors in Predicting Coal Mine Roof-Rock Stability in the Upper Kittanning Coalbed, Somerset County, Pennsylvania
- Report issued by the Bureau of Mines over the geology of roof-rock stability in coal mines. The distribution, frequency, and magnitude of roof falls in U.S. coal mines are discussed. This report includes maps, illustrations, and photographs.
- Geologic Factors Related to Block Caving at San Manuel Copper Mine, Pinal County, Arizona: Progress Report, April 1954-March 1956
- Report issued by the Bureau of Mines over studies conducted on the geologic factors related to block-caving. The results of the study are presented. This report includes tables, maps, and illustrations.
- 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.
- Geophysical Investigation of Manganiferous Iron Deposits, Boston Hill, Grant County, New Mexico
- Report issued by the Bureau of Mines over geophysical studies conducted on iron deposits of Grant County, New Mexico. Methods and equipment used during the studies are presented. The results are also presented and discussed. This report includes tables, maps, and illustrations.
- Geophysical Measurements of Gold-Bearing Gravels, Nevada County, California
- Report issued by the Bureau of Mines over development of geophysical equipment. Methods and instruments used during the studies are presented. This report includes tables, maps, and illustrations.
- Georgia Iron Deposits, Cherokee, Bartow, Floyd, and Polk Counties (In Two Parts): Part I
- Report issued by the Bureau of Mines over exploration of iron ore deposits in four counties in Georgia. The physical features, geology, and analysis of ore samples are presented. This report includes tables, and maps.
- Georgia Iron Deposits, Cherokee, Bartow, Floyd, and Polk Counties (In Two Parts): Part II
- Report issued by the Bureau of Mines over exploration of iron ore deposits in four counties in Georgia. The work accomplished during the summer of 1945 in these deposits is presented. The report describes physical features, geology, and characteristics of the ore samples collected. This report includes tables, maps, and illustrations.
- Georgia Mica Spots: Cherokee, Upson, Lamar, and Monroe Counties
- Report issued by the Bureau of Mines over studies of mica deposits throughout four counties in Georgia. Descriptions of the physical features of the mines, and deposits are presented. This report includes tables, maps, and photographs.
- Geotechnical Aspects of Roof and Pillar Stability in a Georgia Talc Mine
- Report issued by the Bureau of Mines over studies conducted on hazard control in talc mines. Methods of testing, and results of the study are discussed. This report includes tables, maps, illustrations, and photographs.
- Green River Formation Lithology and Oil Shale Correlations in the Piceance Creek Basin, Colorado
- Report issued by the Bureau of Mines discussing the oil-shale formations of the Green River in the Piceance Creek Basin. Detailed descriptions of oil-shale samples taken from the Green River formation are presented. This report includes tables, maps, illustrations, and a photograph.
- Green River Oil-Shale Reserves of Northwestern Colorado
- Report issued by the U.S. Bureau of Mines on the oil-shale reserves near the Green River formation. Samples are analyzed for economic value, and presented in tables and illustrations. The report also includes maps of the sample areas.
- Grounding Electrical Equipment In and About Coal Mines
- Report issued by the U.S. Bureau of Mines on the safety measures used in keeping mining equipment grounded. Methods and instrumentation used in testing grounding equipment are presented. This report includes tables, and illustrations.
- Groundwater Flow Model (GWFM) Development, Midnite Mine, Wellpinit, Washington
- This Report of Investigations (RI) is one of several describing work that has been completed by the U.S. Bureau of Mines at the Midnite uranium mine, Wellpinit, WA. Dean (in preparation) describes the entire project history. Four diskettes containing three archives compressed using WINZIP (or PKZIP) accompany the current RI. The ultimate purpose of this research effort was to develop a groundwater flow model (GWFM) for the Midnite Mine that can be utilized by the contractor preparing the Environmental Impact Statement (EIS) and by other interested parties. The objectives of this study were to (1) develop a shell model of the geology at the site, (2) develop the basis for a GWFM that will meet criteria described elsewhere in this RI and that can be updated with new information generated during the EIS process, and (3) present the results of two steady-state simulations of groundwater flow within the bedrock units. The current GWFM generates nonunique solutions because flow data for the bedrock units currently do not exist. However, the model provides useful results with respect to direction of flow. More data are required to model the bedrock aquifer system accurately. Volmnetric flow rates of the bedrock units should be measured or estimated. Measurements obtained from one or two drains completed in the bedrock in the southern portion of the site should yield these values.
- Hazards of Conveyor Belt Fires
- This report describes a U.S. Bureau of Mines study on the hazards of large-scale conveyor belt fires in underground coal mines, as a function of both air velocity and distance from belt surface to gallery roof. The fire hazards considered were smoke obscuration, toxic effects of carbon monoxide (CO), and elevated air temperatures downstream of the fire. All of these hazards scale with the ratio of fire intensity to ventilation airflow. These hazards were all found to be greater at the lower belt-to-roof distance, owing to the greater fire intensities that resulted. The hazards of smoke obscuration and elevated CO levels were greater at lower air velocities. Smoke obscuration was found to be the earliest hazard, reaching critical levels before the stage of belt flame spread. Critical levels of CO and downstream air temperatures were not reached until the later stages of flame spread. Fire growth rates during rapid flame spread were much greater than rates measured during the early stages of belt burning. Data were analyzed to determine the early-warning capability of fire sensors. Smoke sensors provided the earliest warning, followed closely by CO sensors. Thermal sensors did not exhibit any early warning capability.
- Hermada Antimony Deposit, Elmore County, Idaho
- Report of investigations issued by the U.S. Bureau of Mines on the Hermada antimony deposit in southwestern Idaho. The investigations included trenching and drilling. The report contains maps of the area, and tables of data.
- High-Temperature Cyanide Leaching of Platinum-Group Metals from Automobile Catalysts--Pilot Plant Study
- From abstract: The U.S. Bureau of Mines Reno Research Center investigated, developed, and patented a high temperature cyanide leaching process for recovering platinum-group metals (PGM) from automobile catalysts. A batch pilot plant was constructed at the center and operated to demonstrate this technology to industry.
- History of Water Flooding of Oil Sands in Oklahoma
- Report issued by the U.S. Bureau of Mines on the oil production from water injection methods. As noted in the introduction, "it is the purpose of this report to present data such as volume of oil produced monthly, volume of water injected monthly, spacing of wells, number of injection wells and oil wells, and other such pertinent information" (p. 5). This report includes tables, graphs, maps, and illustrations.
- Human Factors Analysis of Roof Bolting Hazards in Underground Coal Mines
- Abstract: The U.S. Bureau of Mines conducted a human factors analysis of hazards associated with roof bolting activities in underground coal mines. Emphasis was placed on hazards related to the movement of the drill-head boom or mast of a roof bolting machine. The objective was to identify hazards and recommend solutions. The data-collection effort consisted of analysis of U.S. Mine Safety and Health Administration accident data; visits to underground mines and interviews with experienced roof bolting machine operators; discussions with roof bolting machine manufacturers; interviews with workers injured while performing roof bolting tasks; and reviews of research on roof bolting safety. A set of recommendations to increase the safety of roof bolting operations was developed. In particular, the following list of recommendations was presented in ranking order: (1) use an interlock device to cut off power to controls when an operator is out of position,,(2) place fixed barriers at pinch points, (3) provide appropriate control guarding, (4) reduce fast-feed speed, (5) use automatic cutoff switches at pinch points, (6) redesign control bank to conform to accepted ergonomic principles, and (7) use resin insertion tools and resin cartridge retainers.
- Hyatt Rach Pegmatite, Larimer County, Colorado
- Report issued by the Bureau of Mines over studies conducted on Larimer County pegmatite deposits. Descriptions of the deposits are presented. This report includes tables, maps, photographs, and illustrations.
- Hydraulic Characterization of Midnite Mine, Wellpinit, Washington: Summary of 1994 Field Season
- The Midnite Mine is an inactive uranium mine on the Spokane Indian Reservation in Washington State. Oxidation of sulfide-containing minerals, primarily pyrite, produces acidic water. Uranium and other radioactive constituents are chemically leached and dissolved in ground and surface waters. The U.S. Bureau of Mines (USBM) has worked closely with the Bureau of Indian Affairs, the Bureau of Land Management, and the Spokane Tribe of Indians to address data needs for remediation of the disturbed area. As part of this effort, USBM personnel initiated research to determine water quality and define groundwater flow characteristics. Preliminary results of hydraulic stress tests performed in the bedrock at the site are described. Slug tests and pumping tests were conducted using preexisting USBM monitoring wells. Slug test results were used to generate hydraulic conductivity estimates for fractured and unfractured intrusives. The pumping tests demonstrated varying degrees of spatial continuity. Hydraulically continuous fractured zones along north-south planes were demonstrated in two cases for distances of 90 and 116 m (300 and 380 ft). The short-term pumping tests provided no evidence of east-west hydraulic continuity in fractured zones.
- Hydrogenation of Petroleum and Lignite Tar Distillates
- Report issued by the U.S. Bureau of Mines regarding the operation of the Coal Hydrogenation Demonstration Plant in Missouri. This report summarizes the operating experience gained and the characteristics of the products created during operation of the plant. The report includes graphs, tables, and illustrations.
- Hydrologic and Geophysical Studies at Midnite Mine, Wellpinit, Washington: Summary of 1995 Field Season
- Abstract: The Midnite Mine is an inactive, hard-rock uranium mine on the Spokane Indian Reservation in Washington State. Oxidation of sulfide-containing minerals, primarily pyrite, produces large quantities of acidic water. Uranium and other radioactive constituents are chemically leached and dissolved in ground and surface waters. The U.S. Bureau of Mines (USBM) has worked closely with the Bureau of Indian Affairs, the Bureau of Land Management, and the Spokane Tribe of Indians to address data needs for remediation of the disturbed area. As part of this effort, USBM personnel initiated research to determine water quality and define groundwater flow characteristics. Long-term changes in water quality and the results of slug tests and two geophysical surveys are described. Of the locations monitored, only two exhibited water quality degradation over time. Hydraulic conductivity measurements from slug tests are reported for five additional locations in the bedrock. Relative values of hydraulic conductivity from slug tests agreed well with ranked specific capacity data. A geophysical survey identified buried constructed features that channel subsurface water to a contaminated seep. Historic aerial photos corroborated the results of the geophysical study. A new geophysical technique was successfully used to monitor hydraulic and geochemical responses to a pumping test in saturated waste rock.
- Improved Grindability of Taconite Ores by Microwave Heating
- The 11.S. Bureau of Mines has conducted studies to utilize rapid microwave heating to stress fracture ore samples. Iron ores containing hematite, magnetite, and goethite were subjected to microwave energy in batch operations at 3 kW and heated to average maximum temperatures between 840 and 940 *C. Standard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 10 to 24 pct. In a microwave chamber designed to simulate a continuous throughput operation at 3 kW, the grindability of a tacon-te ore was improved by 13 pct at a bulk temperature of 197 *C. Because stress cracking occurred at a lower temperature, less energy was consumed. To further improve the economics of microwave fracturing, higher powers up to 16 kW were used to rapidly heat samples to relatively low temperatures in a continuous, belt-fed applicator. A significant improvement of grindability was obtained with a larger rod mill feed size in comparison to a minus 6-mesh Bond feed.
- Improved Performance of Linear Coal Cutting Compared with Rotary Cutting
- From abstract: The linear cutting system, developed by the U.S. Bureau of Mines, uses geometric principles developed by Cardan to produce a nearly constant cut depth. The new system has been extensively tested in a synthetic material under laboratory conditions to verify mechanical capability and to identify operational characteristics. This report details the improved performance versus rotary cutting.
- Improvements in Methods for Preparing Thin Sections of Rock
- Report issued by the U.S. Bureau of Mines on the importance and instructions for preparing thin sections of rock for microscopic examination. Proper instructions and methods for preparation of thin sections are presented. The report includes photographs.
- Increased Pig-Iron Output Through Improved Coke
- Report issued by the U.S. Bureau of Mines on the increase of pig-iron during steel production. The machinery, organization, and methods used in the study are presented. This report includes tables, graphs, and photographs.