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Eight extinguishing powders KC1, were tested on five types of diffusion flames. The effect of flame temperature on the inhibition efficiency was investigated by varying the oxygen index of the flame supporting atmosphere. In addition a spectrographic investigation of powder - flame dissociation products was carried out on the methane /air /ABC (NH4H2PO4) flame. Dissociation products for this flame included PO, PH, NH, and Na. It is concluded that the main factor to be considered in the efficiency of the powder is the flame temperature. Purple K (KHCO3) was typically inefficient in low temperature flames and very efficient in high temperature flames. On the other hand, ABC . (NH4H2PO4) was found to lose its efficiency...
Tags: Coal
As part of a cooperative project during 1986 and 1987, personnel from the U.S. Bureau of Mines and State of Alaska Division of Geological and Geophysical Surveys studied the mineral development potential of the Chilkat Peninsula and Islands, Alaska, as part of the larger Juneau Mining District study. About 4/5 of the area is within the Alaska State Chilkat and Chilkat Islands State Parks and not open to mineral entry. This study located four new (or previously unreported) gold- copper prospects. One of these, the Road Cut prospect, was examined by trenching, drilling and geophysics. While sufficient grades and tonnages were not delineated by this work to constitute an economic deposit, they are sufficient to encourage...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Chilkat Peninsula & Islands, Alaska,
Copper,
Gold
Uniaxial testing was performed on coal specimens to determine the time - dependent response. The testing was carried out on coal from six mine sites throughout the Western United States and Pennsylvania. Testing configurations were varied to allow analysis of moisture dependency, stress level and specimen orientation. Several theories were presented for the behavior of coal due to moisture diffusion. Experimental results showed the correlation between the theories and the actual material response. Coal deformation was found to be highly dependent on the moisture level of the testing environment. Moisture migration causes drying and shrinkage which lead to progressive degradation of the material. The coal tested...
Tags: Coal
Head of east fork of Rock Creek. Alaska. 1913.
Hosselkus limestone at top of Brock Mountain. Shasta County, California. 1902.
Album Caption: Wyoming, Sheep Mountain. D.D.C. 1915. Lovell quadrangle. Near canyon north of Greybull. Gypsum bed and secondary veinlets in red shale. Lower part of "Embar" formation. Published in U.S. Geological Survey Professional paper 98-O, Plate LXIII-A. 1917. Plate Caption: Bed and veinlets of gypsum in lower part of Embar formation near south end of Sheep Mountain anticline. About 17 feet above the 4 foot layer of gypsum is limestone filled with marine fossils. The veinlets of gypsum are in structure less red shale.
A testing program was conducted to design a cemented backfill for hydraulic placement in underhand cut and fill mining of a steeply dipping coal seam. The testing evaluated the use of three different backfill aggregates, locally available at the coal mine, with Portland cement and five different pozzolans,including a Class F fly ash, a Class C fly ash, a cement kiln dust and ground smelter slag. Both viscosity and uniaxial compressive strength of backfill mixtures with different pozzolan and Portland cement contents were used to evaluate their suitability. Based upon the results of preliminary testing, an optimum mixture of alluvial sand with six percent Portland cement and ten percent Class F pozzolan was chosen...
Tags: Coal
An environmental assessment or impact statement for onshore waste disposal under the National Environmental Policy Act is expected to occur with the development of commercial deep seabed 1 mining. An environmental assessment was conducted in order that testing and refinement of nodule waste disposal techniques can be completed prior to 1988, when commercial seabed mining can begin under U.S. legislation. Within this study three classes of process and four classes of waste i disposal technique were 1 identified, and five sites were selected as representative of first -generation nodule operations. Each realistic site /process /disposal technique combination was compared against potential effects to determine important...
Tags: Manganese
The mechanical properties of coal are often represented by the orthotropic material model, which consists of nine elastic constants. I. The material symmetries involved are found in coal primarily because of the natural process by which it was formed. . In this thesis the material properties of five U.S. coals, as obtained from cubical testing, are examined, using as a basis for comparison the assumption of the orthotropic material model. An analysis is performed on each set of coal .material data in order to examine its conformability.to other, less complex material models, these being the transversely isotropic model consisting of five elastic constants and the isotropic model consisting of two elastic constants....
Tags: Coal
Cores of coal measure rocks from five mines across the U.S. were tested for mechanical, index and mineralogic properties. About 600 samples were tested to determine 15 mechanical property parameters, 7 index parameters and 30 geologic parameters. The results were analyzed for their statistical distributions, and bivariate and multivariate, linear and non -linear correlations were attempted for these groups of parameters. Significant correlations were found for some of the parameters. On the basis of these statistics, predictive models are postulated for the mechanical properties on the basis of index and geologic parameters.
Tags: Coal
Colorado National Monument, Colorado. Fruita Canyon, looking northeast from a point on Rim Rock Drive above the head of the canyon. Dark Proterozoic rocks floor the canyon, above which are the slopes of the red Chinle Formation and the cliffs of Wingate Sandstone capped by the lower resistant beds of the Kayenta Formation. Beyond the Grand Valley are the dark Book Cliffs and the more distant, light-colored Roan Cliffs. May 28, 1970. Figure 45, U.S. Geological Survey Bulletin 1508.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Colorado,
Colorado National Monument,
Lohman, S.W. Collection,
National Parks,
Photographers,
Typed information accompanying contact prints: Roll #7 June 7, 1980 -- Afternoon Frame A# 10. South Fork Toutle River L:W. Steep flow scan in foreground 11. West Ridge survey point at CP. L:E 12. West Ridge survey point at L:NE 13. South fork Toutle and saddle to Castle Creek, L:NW 14. Cliffs at northeast end of Johnston amphitheatre, L:SE 15. Looking south at the crater rampart 16. Erosion near the head of the South Fork Toutle River 17. Erosion near the head of South Fork Toutle River 18. Erosion near the head of South Fork Toutle River Photos of Mount St. Helens area, June 4 to 11,1980 taken by Hugh H. Kieffer, many from helicopter using Honeywell Pentax 6X7 (70 mm film), 105 mm lense. Abbreviations...
Categories: Image;
Tags: Kieffer, H.H. Collection,
Mount St. Helens Collection,
Photographers,
Volcanoes,
Washington (WA),
Album Caption: Montana. D.D.C. 1916. Rock slide from Quadrant quartzite, Snowcrest Range. Exposure are Quadrant formation. T. 10 S., R. 3 W. Published in U.S. Geological Survey Professional paper 120-F, Plate XI-B. 1919. Plate Caption: Principal peak in Snowcrest Range: consisting of Madison limestone (lowest exposures in view), overlain by shaly limestone of the Quadrant quartzite capped by quartzitic beds which form the talus slopes in the foreground. Madison County.
A pilot program was undertaken to evaluate a process developed by the U.S. Bureau of Mines to recover nickel, cobalt, copper and chromite from domestic nickel laterite resources. An existing five ton per day pilot plant was modified to accommodate treatment of laterite by the Bureau process, which employs reductive roasting, ammoniacal sulfate leaching, solvent extraction, and electrowinning to extract, separate, and recover nickel, cobalt and copper as high purity cathode products. Three distinct types of laterite i.e., limonite, saprolite and a mixture of limonite / saprolite were processed through the plant during three operating campaigns. Nickel cathode was made during all three campaigns, while cobalt cathode...
Album Caption: Ohio. Woodfield quadrangle. D.D.C. 1914. One mile east of Woodfield. Sandstone quarry. (Mannington member?). Published in U.S. Geological Survey Bulletin 720, Plate XI-B.1923 Plate Captiona: Quarry in sandstone near Woodsfield.
Categories: Image;
Tags: Condit, D.D. Collection,
Mills, Mines, Quarries,
Photographers,
photo print
The EPA and the Congress are considering the use of a tax on primary lead to reduce U.S. lead consumption, to generate revenues for a lead abatement program, and /or to encourage the secondary recovery and recycling of lead. This study assesses the economic impacts of a tax on primary lead and lead imports. The results of this study suggest a primary lead tax policy will be ineffective in achieving these objectives. Increased secondary supplies, largely from imports, are expected to displace domestic primary lead supplies that become uneconomic because of the tax and no substantial increase in lead battery recycling is estimated to result from the tax. A primary lead tax of $.80 per pound would eliminate domestic...
Tags: Lead
Glacial polish on rock along Pines Road. Washington. ca. 1970
Categories: Image;
Tags: Photographers,
Washington,
Weis, P.L. Collection,
color transparency (slides)
New York. Postglacial anticline in limestone near Split Rock, west of Syracuse. 1902.
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