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By Graham M

Longwall mining has been the dominant global coal mining method for decades. However, not until 1994 did longwall mining surpass continuous miner room and pillar extraction tonnage in the United States. This significant event, occurring in the most cost driven market in the world, confirms the efficiency and effectiveness of longwall mining.

Jan 1, 1998

When a fire or explosion occurs underground the ventilation maybe disrupted and the atmos- phere may become oxygen deficient and filled with noxious and flammable gases. The basic survival technique for:any man alive underground is to escape and this may be achieved and rescue workers may enter such atmospheres to carry out rescue work underground by using appropriate breathing apparatus.

Jan 1, 1983

A pilot pump rehabilitation programme commenced at Isa Mine in the late 1960ts. Over the years, it has now been developed into a full scale repair programme resulting in large operating cost savings. This paper will examine various materials used as wear media in the rehabilitation of pump parts for recycling, the use of other materials in manufactured design and appli- cations of these principles to other process Equipment.

Jan 1, 1978

By Rubisov DH

This paper is related to the problems of the mathematical modelling of vibrating screening process and to predicting the screening operation results. The authors propose a model of screening based on the interpretation of granular material segregation on a screen surface as an instantaneous process. Results show an agreement with laboratory and pilot plant tests. Derived formulae can be used for screen sizing and screening result estimating.

Jan 1, 1993

In the wake of the United Nations Conference on Environment and Development (UNCED) held in Rio de Janeiro in June 1992, evolved AGENDA 21. This document which was adopted at the Conference, provides a global action guideline for sustainable development into the 21st century.Sustainable mining requires a complete understanding of the `mineral cycle', including government legislation, mineral exploration, mining operations, rehabilitation, product use, re-cycling and waste disposal that takes into consideration associated social and environmental considerations and achieves economic objectives.

Jan 1, 1993

The title of my address today is "Oil and Gas Valuations - A Simplistic View of Some Critical Issues". Alternatively I could have called this address "Pitfalls for investors' and corporates in accessing Independent Experts Reports" 'as in this brief 12 minute talk I will briefly comment on some common misconceptions with regard to the valuation of exploration areas and production interests, and comment on how the draft release guidelines address these issues.

Jan 1, 1989

By Hutchings AA

This paper describes MIM's experience in arranging and executing project financings for coal projects at Oaky Creek and Newlands and Collinsville and the port facility of Abbot Point.The financings had their origins in the late 1970's and culminated with the opening of these projects during 1983 and 1984.MIM's financing developments therefore span an important period in the development of resource projects in Australia.Resources projects have been growing in both scale and complexity of financing requirements.

Jan 1, 1985

By Hamilton LH, Campbell PB

Since fundamental research in applied coal petrography is carried out mostly on polished surfaces, backscattered electron microscopy is most applicable for studying coal in the SEM. By employing this technique coal macerals can be easily identified , and information on the relations between maceral groups, mineral matter and trace elements are highlighted by grey level contrasts. This type of information is valuable in coal technology and cannot by normally revealed by the light microscopy (e.g. the distribution of inherent mineral matter).

Jan 1, 1989

By Gadsden R. W

Physical and chemical requirements are defined for coke and ferrous materials used in modern high productivity blast furnaces operating in Australian conditions. Recent developments in the type of equipment required to be installed at the steelworks to ensure these requirements are described with illustrations from current plant practice provided.

Jan 1, 1976

By Gillies A. D S, Supriyadi

The landed cost of coal to the international customer is a major parameter which determines market competitiveness. Rail, port and shipping charges represent 30 to 50 per cent of landed costs for Australian mines selling to Asia. This prop

Jan 1, 1994

Direct seeding or regeneration of vegetation in Australia has been occurring in nature for about 400 million years! From the 1870's till the 1930's, direct seeding by man was used in the south-west of Victoria as a method of re-establishing native vegetation on broadacre farmland. The introduction of improved exotic pasture grasses and the wide-spread use of superphosphate from the 1930's lead to its demise as a farmland revegetation technique.

Jan 1, 1992

During its 60 years of existence the growth and development of Western Mining Corporation (WMC) has been greatly influenced by the men who led it. For the most part they, rather than any chance circumstances or good luck, determined the fortunes of the Company. This paper is essentially a series of biographical sketches of some of these men, together with a note of some of the major events which caused WMC to become the entity it is today.

Jan 1, 1993

By Wernick B. J

Recently, the Environmental Engineering Laboratory of the Chamber of Mines of South Africa Research Organization has made signifi- cant progress in the development of more accurate algorithms for assessing heat flow in gold mines. These algorithms have been incor- porated into an overall computer program, ENVIRON, which enables the complete thermo- dynamic analyses of mine ventilation and cool- ing systems to be carried out. Recently, efforts have concentrated on the development of an expert computer system which will guide engineers in the process of selecting the most appropriate environmental control strategy.

Jan 1, 1988

By W F. Bawden, J T. Paynter

This investigation involves laboratory testing and stability analysis of paste fill at the Golden Giant Mine. Site-cast samples are tested in unconfined, confined, and consolidated-undrained triaxial compression. Pore pressures during shear and consolidation characteristics are measured to determine both drained and undrained shear strength parameters and assess the potential for undrained loading. Liquefaction potential is also considered. A limit equilibrium solution is used to obtain factors of safety against failure of the fill during mining of adjacent stopes.

Jan 1, 1998

By Hryniewicz M

The paper presents a sound critical estimate of mathematical models presently used for the process of compaction of fine-grained materials. It shows the mathematical model of compaction developed by the authors, which was used to formulate the program of computer simulation of the process. The examples of computer simulation experiments of compaction of selected fine-grained materials regard the results of the experiments made by the authors on variability of external friction occuring in this process. Simulation examination presented in the paper crucially contributed towards the original method of selection of rational compaction technologies of fine-grained materials developed by the authors.

Jan 1, 1993

This paper examines the properties of Australian indigenous crude oil and the changes to Australian refinery process- ing required after the Gippsland crude finds in the late '60s. In addition the paper details the dif- ferent crudes available to Australian ref ineries and the relative product yields in relation to Australian crudes. Market demand for petroleum products both now and in the future is then related to the products yields. The paper also examines the impact of the OPEC induced crude price spiral and the subsequent changes in refinery engineering, current and projected market demands, and energy conservation measures both inside and outside the industry.

Jan 1, 1982

The cost of constantly extending a decline tunnel that plays a part in the actual extractive process is a revenue cost. The characteristics of such a decline tunnel are that it is dug in a series of relatively small excavations. It follows the ore body and is dug as close to the ore body as practicable. In addition, the decline allows for the extraction of ore in the immediate vicinity, with the ore being extracted in a relatively short period of time.

Jan 1, 1990

The Savage River Mines concentrator and pipeline has operated for seven years. During this time some problems of general interest have been overcome, particularly in the area of autogenous grinding in large mills and in pump- ing solids over long distances. The plant flow sheet and equipment at Savage River and the control techniques are. described. Ore type has varied widely over the per- iod of plant operation. Techniques developed to minimise the effect of variations on through- put are discussed'. The main technique is the controlled rejection or addition of grinding Media.

Jan 1, 1975

By Valenti M

A by-product of the lead smelting operations at BHAS is a copper-lead matte typically containing 35% copper, 38% lead and 12% sulphur. A hydrometallurgical treatment process has been developed for the treatment of this matte to recover copper as cathode and results in a lead-sulphur residue which is recycled to the lead smelter. A commercial plant with a nominal capacity of 4000 tpa utilising this process was commissioned during 1984. This plant has been shown to be capable of producing copper cathode at rates approaching 4000 tpa over short periods of time.

Jan 1, 1989

By Parsons AE, Lewis IE

Selenium is a minor constituent of the raw materials processed by the Cockle Creek smelter of Sulphide Corporation Pty. Limited. Certain proposed raw materials contain higher levels of selenium, and these will create a problem with regard to the composition of liquid effluent discharged from the smelter. A method has been developed for removing selenium from the smelter circuit by the sulphation of the fume collected in the Acid Plant electrostatic-precipitators. It is planned that by treating 10-20% of the total dust arisings there will be a substantial reduction in the levels of selenium reporting in effluents when treating selenium-bearing raw materials. The selenium is recovered in elemental form.

Jan 1, 1978