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The process of defining the external environmental costs of mining activities, devising appropriate mechanisms to internalise them is complex and is likely to be a gradual.Australia's competitiveness could be seriously affected if , in terms of incorporating environmental costs, we were to exceed other resource producing nations.Australia has a great deal at stake in the debate and therefore we need to proceed carefully and be fully aware of the environmental and economic issues.

Jan 1, 1992

By Will Roberts, M. E. Williamson

After verification of methodology and testing of prototype systems during 2005/06, Nautilus Minerals expanded their Papua New Guinea (PNG) operations to a full commercial exploration program in 2007. Included was the deployment of sensors and survey systems to locate, characterize and verify massive sulfide deposits with potential as mine sites within the tenements held by Nautilus in PNG. This presentation discusses some of the gear developed and operated during the 2007 PNG investigation.

There is plenty of sulphur available but not at the price currently being paid for brimstone. Immediate shortages may be felt before the market adjusts, making marginal sources and by-product sulphur and acid available. (See P. 403) Government aid for mineral exploration is available and regulations governing applications are available from The Defense Minerals Administration, Dept. of Interior. lust ask for M0-5 and also for the contract form which is MP-103.

Jan 5, 1951

A fast, easy, and inexpensive method of determining the consolidation of overburden in surface mining operations through seismic analysis has been developed. The method involves use of a refraction seismograph which measures overall consolidation of subsurface materials, including such factors as rock hardness, stratification or lamination, fracturing or jointing, and the degree of weathering or decomposition. It also is possible to determine the thickness of various layers of subsurface materials to depths exceeding 100 ft.

Jan 8, 1959

By R. A. Wood, R. I. Jaffee, H. R. Ogden, D. N. Williams

CERTAIN titanium alloys when quenched to retain the 0 phase at room temperature show extensive transformation of 0 to martensitic a during deformation. Alloys of this type are usually characterized by low tensile yield strength, a large spread between yield strength and ultimate strength, and high uniform elongation. A previous investigation of this phenomenon concluded that the principal contribution of the martensitic transformation was to increase the amount of deformation prior to fail-

Jan 1, 1964

While international coal trading operations often involve relatively small contract quantities, delivered over short periods or even in single shipments, most coal is supplied under long term arrangements. In entering into these arrangements the customer needs to be assured that coal of suitable and consistent quality can be supplied for their duration in the volume required. A detailed knowledge of the mine and transport system is required and must be presented from the customer's perspective.

Jan 1, 1983

By Dirk Timmerman, Klaus Schönert

This paper reports on the results of research on counter flow classification of - 10 µm particles. Two classifiers were designed and constructed, the first semicontinuous and the second fully continuous. The latest version operates continuously with recoveries of fines up to 90% at feed loads of 30 vol.%, separation sharpness X25/x75 up to 0.83, without bypass and cut sizes down to 1.4 µm (x50 from separation efficiency curve).

Jan 1, 1995

By George Verley

A new and important task in assisting developing countries is the transfer of microcomputer technology applied to mineral exploration and mining. With this objective in mind, three micro- computers have been introduced in Niger and a training program has been put into place. The core of the program consists of two seminars in Niamey, Niger, after which the attendants will be able to operate a microcomputer and use a small library of application software.

Jan 1, 1987

By Gerald R. Coonan

Laboratory research is being conducted to substantiate suggested levels for voluntary standards on human response to transient vibration. The application of those findings to actual field conditions, however, will be limited because they will not include social and psychological factors existent in the real world. It is necessary, therefore, to examine available empirical information on complaints in an attempt to define the influence social and psychological factors might have on the laboratory results.

Jan 1, 1982

By Wils L. Cooley, Herman W. Hill

'The electrical behavior of ground beds is often quite different from what would be expected based on experience with electric circuits. An explanation for this unique behavior is given, through means of an analogy, which should promote intuitive understanding of ground beds. The nonmathematical development of the text is complemented by an extensive appendix which describes the details of ground bed calculations. This work was supported by U.S. Bureau of Mines contract G0144138.

Jan 1, 1979

By A. L. Holley

THE intention of this paper is not to discuss this important subject in all its bearings, but merely to point out why mechanical tests of steel, as ordinarily made, are not, alone, of any special value to engineers-certainly not to general mechanical engineers. The agents of the Barrow Hematite Steel Company, one of the largest and most successful Bessemer establishments in England, have recently distributed a report, made by Sir William Fairbairn,

Jan 1, 1874

Perhaps, after years of concerted effort at a mineral prospect, your company has reached the stage of feasibility study. Detailed target investigations, drilling, bulk sampling, land acquisition, and engineering analyses are complete, and the deposit still remains an attractive investment possibility. Your company, after long study, decides to begin mine development-now, how do you convince lending institutions that your proposed operation will return their borrowed funds, plus interest, over the term of the loan?

Jan 12, 1978

By Theo Lehner

Nasty, according to the Collins Dictionary, comprises the adjectives: bad, critical, dangerous, dirty, odious, serious, severe, sickening, unpleasant etc. From this we may at first conclude that each individual smelter relying on its own specific business surrounding would have a special definition of its nasties. But common product standards and common metallurgy makes us experience common nasties. To get an idea of possible problem elements we start with the demands on the products: [ ]

Jan 1, 1994

By F. Breu, R. Fraser, R. Lawrie

Diesel-powered underground mining equipment is generally accepted as the most productive, safest, and most efficient equipment used in underground mining operations. Widespread application of this equipment to underground mining is restricted, however, largely because of the difficulty of controlling the diesel engine exhaust emissions. This paper briefly examines control devices currently available for underground application, and also discusses the theory and mechanics of controlling diesel emissions with particulate traps and filters.

Jan 1, 1988

By A. L. Holley

The intention of this paper is not to discuss this important subject in all its bearings, but merely to point out why mechanical tests of steel, as ordinarily made, are not, alone, of any special value to engineers—certainly not to general mechanical engineers. The agents of the Barrow Hematite Steel Company, one of the largest and most successful Bessemer establishments in England, have recently distributed a report, made by Sir William Fairbairn,

By T. O. Olsen, R. Henriksen

Aggregated models of a bank of flotation cells have frequently been used, assuming that a single-cell model can be used for control and estimation purposes. In this paper we investigate the feasibility of this approach, and show that single-cell aggregated models may very well be used in order to estimate the aggregated net flotation rate constants of the bank. These estimates would usually be very crucial in order to control the plant.

Jan 1, 1981

By Howard B. Gundersen

CURRENTLY the mining industry faces the twin tasks of producing metals in the largest possible amounts and doing it with a dwindling and less experienced labor supply. A manpower shortage during this emergency appears inescapable. It therefore becomes necessary to develop the highest possible efficiency. Employee training is a concomitant of economical, high production. Training keeps employee morale high, reduces waste, improves skills, and increases production without speed-up or overload of workmen or supervisors.

Jan 9, 1951

By R. W. Smith

An amine used as a collector in a commercial flotation process is usually a rather impure substance. The differences in ionization constants and solubilities of various amines undoubtedly affect their collecting power or strength. This investigation explores some of the differences among several amines of similar (although not precisely the same) chain lengths. An attempt is made to relate the differences to both observed contact angle and Hallimond tube flotation behavior in quartz systems.

Jan 1, 1974

By Michael L. Sorokin

The metallic nickel production by converting of nickel matte is analysed from the thermodynamic point of view using earlier developed thermodynamic models for sulphide, metal and slag phase. Three-suffix Margules equations are used to calculate thermodynamic properties of melts. Potential diagrams of Ni-FeS-OSiO2 system are calculated for various temperatures and Fe to Ni ratios. The diagrams used for consideration about possibilities of the direct one-stage metallic nickel production.

Jan 1, 1995

By Y. P. Chugh, R. F. Roethe

Surface coal mining productivity in the US and Illinois has declined since 1969. The US Department of Energy conducted an analysis in 1980 of the causes of declining productivity in different states. This paper presents a detailed analysis of changes in overall productivity and productivity in different functions, such as overburden preparation and stripping, reclamation, and coal handling, from 1970 to 1982. Statisical analysis techniques, including multiple regression were used in the study.

Jan 1, 1985