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Articles 1 - 4 of 4
Full-Text Articles in Mining Engineering
Simplified Cost Models For Prefeasibility Mineral Evaluations. U.S. Bureau Of Mines Information Circular 9298, 35, Thomas W. Camm
Simplified Cost Models For Prefeasibility Mineral Evaluations. U.S. Bureau Of Mines Information Circular 9298, 35, Thomas W. Camm
Mining Engineering
In this U.S. Bureau of Mines report, mine and mill cost models are presented to make quick estimates of the cost to develop mineral deposits in the desert region of the Southwest United States. Regression analysis was used to generate capital and operating cost equations for each model in the form Y = AXB, where Y is the cost estimated and X is the assumed daily capacity in short tons. A and B are constants determined by the regression analysis. Each is broken down into 11 subcategories to facilitate escalation of costs for inflation and to increase their versatility in …
A Nuclear Fragmentation Energy Deposition Model, John W. Wilson, D. M. Ngo, T. N. Forgarty, W. W. Buck
A Nuclear Fragmentation Energy Deposition Model, John W. Wilson, D. M. Ngo, T. N. Forgarty, W. W. Buck
Mining Engineering Faculty Research & Creative Works
A formalism for target fragment transport is presented with application to energy loss spectra in thin silicon devices. A nuclear database is recommended that agrees well with the measurements of P.J. McNulty et al. (1980) using surface barrier detectors. High-energy events observed by P.J. McNulty et al. (1981), which are not predicted by intranuclear cascade models, are well represented by this work
Subsidence Resulting From Multiple-Seam Longwall Mining In The Western United States - A Characterization Study, United States Department Of The Interior, Bureau Of Mines
Subsidence Resulting From Multiple-Seam Longwall Mining In The Western United States - A Characterization Study, United States Department Of The Interior, Bureau Of Mines
Mines and Mineral Resources
This report details the investigation of multiple-seam longwall subsidence conducted by the U.S. Bureau of Mines from 1978 to 1989. A field investigation monitored ground surface movements over four upper-seam longwall panels and six lower-seam panels. The characteristics of the subsidence occurring as a result of mining these panels are examined; in particular, the angle of draw, subsidence development, total magnitude and areal extent, and critical width are evaluated and discussed. Comparisons are also made between the characteristics of multiple-seam longwall subsidence and single-seam longwall subsidence that occurred at the same site.
Disintegration Of Wood, Marian Mazurkiewicz
Disintegration Of Wood, Marian Mazurkiewicz
Mining Engineering Faculty Research & Creative Works
Disintegration of a body of organic material involving subjecting the body to liquid jet action with the energy of the liquid as it impacts on the body such as to effect disintegration of the body into particles.