Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
The Investigation Of The Rock Mass Stressed-Deformed State Under The Conditions Of Floating Earth Presence In The Roof Of The Level WorkingBy V. Bondarenko
The forecasting of floating earth inrush into the working is to a great extent connected with the investigation of the rock mass stressed-deformed state around the working. The aim of such investigati
Jan 1, 1996
-
Criterios de productividad en el diseño de tajeos para vetas irregularesBy Miguel A. Farfán
El presente trabajo describe los criterios de productividad en el diseño de tajeos para vetas irregulares a través del método de explotación de corte y relleno. Dicho método es factible -en tanto es c
Sep 12, 2005
-
An Approach For Instrumentation DesignBy J. Sanko
When faced with the task of designing a process control system the control engineer must consider the following: 1. The type of process to be controlled and the manner in which the process must be co
Jan 1, 1981
-
Alluvial gold dredging: a case study of effects on groundwater turbidityBy H. R. Thorpe
A floating gold dredge operating in coarse alluvial gravels of the Grey River on the west coast of the South Island, New Zealand, generated high concentrations of clay and colloidal particles in the d
Jun 19, 1905
-
RI 7069 Parameters Affecting Reduction-Induration Of Unfired Magnetite PelletsBy R. B. Schluter
Magnetite pellets were simultaneously reduced and indurated on a laboratory scale in order to determine the effects of temperature, induration time, degree of metallization, and sulfur content upon th
Jan 1, 1968
-
OFR-105-92 [Environmental Regulation For Mines In Southeast Alaska - And Its Effects On Projects Design, Timeframes, And Uncertainty, A Preliminary Review] - Environmental Compliance RequirementsBy Lisa A. McDonald
The environmental compliance process affects all aspects of hardrock-mining operations, from exploration through post-closure. The primary components of the environmental compliance process are requir
Jan 1, 1992
-
OFR-133(2)-81 Study Energy Absorption Characteristics Of A Pit Bottom Buffer - Vol. IIBy F. A. Penning
An experimental and analytical investigation was conducted on a recoverable pit bottom buffer. Work was conducted at the Colorado School of Mines using the U.S. Bureau of Mine-s free fall test tower.
Jan 1, 1980
-
IC 8725 Projects To Expand Fuel Sources In Eastern States - Survey Of Planned Or Proposed Coal Mines, Coal And Noncoal Conversion Plants, Electric Generating Plants, Oil RefineriesThis Bureau of Mines report comprises tables listing the name, location, and other pertinent data concerning certain future fuel-related projects. The tables include information on projects involving
Jan 1, 1976
-
Employment And Injuries In The Metal And Nonmetal Industries (f0df1e9c-d44c-4f72-91b8-6b254e76201f)By Forrest T. Moyer
INJURY experience in the metal and nonmetal mineral industries during 1964 was better in rates of occurrence but worse in severity rates than in 1963. The frequency rate of injuries per million man-ho
Jan 1, 1965
-
The Effects Of Design And Operating Variables On Rod Mill Performance (7f523b40-68c0-40b6-8014-dcae9940ff7e)This paper describes major technical developments in rod mill design and operating practice since its introduction into the North American minerals industry over fifty years ago. The basic operating c
Jan 1, 1986
-
Surface Subsidence. in Longwall Mining--A Case StudBy R. D. Yancich
A case study of longwall mining surface subsidence was performed at a mine in Southwestern Pennsylvania. The mine operated in the Pittsburgh coal seam which averaged 70-72 inches with 6-8 inches draw
Jan 1, 1984
-
Ground Freezing For Shoring Of Excavations - A Case History: 1405/SR522 Vault NW-6By Daniel Mageau
Ground freezing has been used for over 100 years to provide shoring and ground water cutoffs for hundreds of projects worldwide, including drilled shafts, tunnels and cofferdams. Typically, these case
Jan 1, 1998
-
Process Optimization in Mining: The Next Paradigm Shift in Productivity Gain after Mechanization and AutomationBy Christoph Miller
About 80 years ago the mining industry saw an advertisement of a machine manufacturer: ?One man ? one machine?, meaning the productivity gain by using a pneumatic rock drill instead of manual tools. M
Oct 1, 2009
-
Current Billing Technology In Mineral ExplorationBy Emerson J
Drilling has always been one of the most important parts of the exploration process with most companies spending around 25% of their budget on drilling. Although superficially there appears to be
Jan 1, 1987
-
RI 9203 - Computer Modeling of Dust and Forces for Longwall Mining SystemsBy B. D. Hanson
An interactive computer program has been developed by the Bureau of Mines which enables the user to identify the effect of cutting system changes on relative dust generation for longwall shearer drums
Jan 1, 1988
-
The use of mid-panel ventilation shafts to improve positional cooling efficiency in a Bowen Basin longwall mine – a case studyBy D Brouwer, P Wild, B Belle
Due to the steep geo-thermal gradient in Bowen Basin area, as underground coalmines reach increased depths of extraction, the Bulk Air Cooling (BAC) requirements will increase as opposed to cooling th
Aug 28, 2017
-
Evaluating Efficiency of Geo5 in the Analysis of Pile FoundationBy Elizabeth Varghese, Sanket Rawat, Prachuryya Kaushik, Ravi Kant Mittal
"Geo5 Software is gaining popularity worldwide due to its expediency in analysis and design of pile foundation. The analysis is based on various theoretical, empirical and semi-empirical methods avail
Jan 1, 2017
-
RI 3288 Detailed Statistical Microscopic Analyses Of Ore And Mill Products Of The Utah Copper Co. ? Introduction (22f9bf8a-7549-4c23-9796-010e350bad1a)By R. E. Head
This paper embodies the data obtained by a detailed statistical, microscopic analysis of the composite mill feed concentrate, and tailing, from the Magne and Arthur mills of the Utah Conger Co. for 1
Jan 1, 1935
-
Beyond Mine-to-Mill - Circuit Design for Energy Efficient Resource UtilisationBy A R. Bye
Energy comes at great cost to our world and societies and therefore we should use it wisely and optimally. Societal pressure is enforcing this and the industry must respond by being proactive.The mine
Jan 1, 2009
-
RI 6126 Use Of A Large-Diameter Reactor In Synthesizing Pipeline Gas And Gasoline By The Hot-Gas-Recycle ProcessBy A. J. Forney
The hot-gas-recycle process, for the hydrogenation of carbon monoxide, was investigated in a 12-inch-diameter reactor. Initially because the distribution of gas was poor, hotspots developed in the cat
Jan 1, 1962