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By G. C. Thompson

A total system for the simultaneous management of various projects is presented. The objectives of the present organizational structure of the Coal Division in respect of projects are listed, as are the requirements for effective functioning of this organization. The processes involved in strategic planning and in the identification. evaluation, and development of projects are described. The monitoring and control of capital as well as project construction and production management. are discussed. Finally, the important role of project work in the development of management is stated, and the necessity for the continual assessment of the effectiveness of the project organization is stressed.

Jan 1, 1981

The paper discusses some theoretical aspects of Gy's sampling theory and provides reasons as to why it has found limited use in the mining industry, particularly for ores with low concentrations of values such as gold. These types of ores are referred to as low grade ores in the paper. It is shown that the misuse of the a priori liberation factor proposed by Gy is the main reason for the implementation limitation of Gy's model for low-grade ores. In addition, results of a case study done at the Gencor Geostatistics Department based On the new implementation of Gy's theory are provided.

Jan 1, 1996

By Collins BJ

Basic principles of stack injection are outlined and supported by calculations of thermal, chemical and aerodynamic requirements of an ideal 4000 tpd furnace. Calculated results show that these requirements vary with conversion of FeO, and that best performance may be expected with XFeO = 1.0 for which calculated production is 6919 tpd and coke rate is only 211 kg/thm. Calculations are also presented for a cycled injection. Discussions show that stack injection is a good way of overcoming softening problems and meeting the demand for iron in a fluctuating demand situation when it exceeds the maximum capacity of a furnace.

Jan 1, 1975

By Kenneth Eltschlager

Post-blast assessment techniques using off-site data which includes location, seismograph and photographic data were discussed during the Blaster’s Weekend at this year’s ISEE Conference. Blast and property locations with commonly available GPS units allow for the spatial relationships surrounding the blasting to be documented. When distances are coupled with the charge weight per delay, the scaled distance can be calculated to any structure for either compliance with the rules, or to project limitations. When blasting seismograph data is obtained, the scaled distances are then able to be plotted against ground and air vibration levels for post-blast assessment purposes.

Jan 1, 2007

By A. W. S. Schumann

SYNOPSIS The most economic exploitation of South African coal resources requires sustained study of the balance between known resources and the predicted rate of consumption, against the background of the development of other sources of energy in South Africa and relevant developments elsewhere in the world. A number of the major issues which would arise in such a study are discussed, including the need for a standardized South African definition for coal resources, the merits of sectoral forecasts of consumption compared with global forecasts, the encouragement of a higher recovery from reserves, and the development of an export market for South African coal.

By Brian Putland, Fred Kock, Leigh Siddall

Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore types with the advantages of being comparatively low capital cost and flexible for future expansion. The single stage SAG/AG milling option is ideal for starter projects with significant exploration and expansion potential. Currently a number of the largest SAG mills designed are installed in single stage configuration. This paper discusses the challenges associated with the process design of single stage SAG/AG milling circuits, the design flexibility required to ensure a robust circuit and the operating techniques adopted at successful installations.

Jan 1, 2012

This month, Foote Mineral Co. will start to commercially recover tin in the area of Kings Mountain, North Carolina. For 50 years there have been intermittant efforts to recover it but it has finally become economic as a by-product in the mining and concentrating of the associated lithium ore. An unusual deposit of a nonmetallic mineral which is high in sericite, low in quartzite, and similar in physical characteristics to pinite, has been discovered by the Summit Mining Corp. in Adams County, Pa. Work is in progress to determine its suitability for ceramics, fillers, and extenders for insecticides.

Jan 10, 1951

By Oberlin Smith

The object of this paper is not so much reformatory, as historical and prophetic. History tells us that, for several months past, aluminum has, in one of its largest American manufactories, been freely nicknamed " Al" by everybody connected therewith, simply because its Christian name is too long for frequent speaking and writing. In another prominent factory, for the same reason, it is spoken of by its chemical symbol merely, pronouncing it " aye ell." These facts will, perhaps, explain the use of the final word in my title, which might otherwise seem undignified in a paper of this kind.

Jan 1, 1890

Reynolds Jamaica Mines, Ltd., has received a $3+ million loan from ECA for the development of what are termed the largest bauxite deposits in the world in Jamaica, B.W.I. This amount is in addition to $11 million already provided. The new agreement calls for delivery of 750,000 tons a year beginning in early 1952. Inco has announced a new alloy containing 35 pet Ni which can be used for many purposes served by the old alloys which ran up to 70 pet Ni. The new alloy "Incoloy" is 35 pet Ni, 20 pet Cr, and the balance iron.

Jan 8, 1951

MISSOURI SCHOOL OF MINES On the tenth of January, 1919, a meeting was held by the juniors and seniors for the purpose of reorganizing the Missouri Mining Association. The reorganization was brought about in this manner because at that time there were no old members left in school. At that meeting, the following officers were elected for the remainder of the year: Gerald F. Rackett, president, Harland H. Hoppock, Secretary. The Association has held several interesting meetings and is arranging interesting programs for some to be held in the future. At present the Association has thirty-four members. H. H. HOPPOCK, Secretary.

Jan 5, 1919

First actual production of titanium metal at the newly constructed Henderson, Nev., plant of Titanium Metals Corp. of America occurred in mid-October. Production will be expanded rapidly until the initial goal of 10-tons per day is reached. This will be equivalent to eight times the present world production of titanium metal. W. Eberstady & Co., New York City, has announced plans for construction of a $400 million plant for the manufacture of synthetic liquid fuels from coal in southern Illinois, if the Government will guarantee a minimum price for the gasoline and other products to be produced.

Jan 11, 1951

The resurgence of mining over the last 30 years has coincided with a growing awareness in the community of the importance of environmental protection and conservation. This involves a growing concern about environmental degradation, an increasing desire for the setting-aside of natural areas for wilderness preservation, accelerating pressures for the return of large areas of Crown land to Aboriginal ownership and a widening view that economic growth itself may be undesirable (Burton, 1987). This has lead to much public debate over the implementation of sound environmental policies to achieve a balance between economic necessities and ecological goals.

Jan 1, 1991

Consideration of the questions: (i) is it feasible to study groups of processes in a generalised way? (ii) to what extent does purpose affect the form of a process model? (iii) are there any significant, novel investig- ations which can be made by computer simulation? (iv) what long-term developments are desirable in extractive metallurgy? has led to some new broad objectives for research in hydrometallurgical process engineering. Propositions for grouping processes, developing models for different specific purposes, using a systems engineering approach and developing high technology processes are discussed, and the role of computer simulation indicated by reference to particular projects.

Jan 1, 1984

By M. Kanda, J. W. Adams

A system for measuring amplitude probability distributions (APD’s) of electromagnetic noise in coal mines is described and typical APD’s from an underground coal mine are presented. The APD is a basic statistic required for the design and analysis of communication systems, especially those intended for use in noisy environments, and where neither overdesign nor underdesign is acceptable. The rms and average field strengths are obtained by integration of the APD, and examples are shown at several frequencies. All field strength levels are given in absolute units. Selected frequencies cover the range from 10 kHz to 32 MHz.

Jan 1, 1973

By S Lukovic, Vishwa Bhushan, Calvin J. Konya

Effect of each of these variables has been well characterized for ANFO. This paper presents results of underwater energy measurements for one watergel and one emulsion type of slurry explosive which were initiated by 3 types of initiators (one electric and two cords of different strength) in 2 and 3 inch diameter steel pipes. Results of this 2 x 3 x 2 factorial experiment show the effects of detonating cord on energy released by the watergel and the emulsion explosive. Effect of diameter and its interaction with cord strength have also been characterized for the two explosives.

Jan 1, 1986

By R. K. Davey

Subsequent to the determination of an ultimate pit and ore reserves for metallic and nonmetallic deposits, it is necessary to develop the most profitable long-range mining sequence for the deposit. Long-range planning is a dynamic process because product prices and costs change, additional assay and metallurgical data become available, mining technology and operating prices and requirements change. The three case studies included in this subsection present different techniques for dealing with the objectives of long-range planning. To be able to forecast production, profitability, and capital requirements, it is essential to have a long-range mining plan.

Jan 1, 1979

By S. K. Mishra, R. L. Lytton, D. Sinn, D. Saylak

Calcium chloride is widely used for dust control on unpaved roadway surfaces, in base course stabilization, full depth reclamation and for total reconstruction of asphalt roads. Fly ash produced from coal-burning electric power plants have also been used in road construction. This paper examines the synergistic effect of calcium chloride and fly ash on compaction density and strength development of unpaved roadways. A mathematical model has been developed which provides excellent agreement with the experimental data. Based on these results, the potential of calcium chloride - fly ash treatments for typical mine road construction is discussed.

Jan 1, 2004

By Barbara Fotta

This article examines health and safety trends during the past 10 years at Appalachian surface and underground bituminous coal mines. Data for Appalachia include Pennsylvania, West Virginia, Virginia and eastern Kentucky. These states account for more than 90% of the coal production in the Appalachian region. (Production, accidents and fatalities in Ohio, Maryland, Tennessee and Alabama are not included in computing Appalachian trends.) Trends for Appalachian underground mines are differentiated by size and mining method into three categories: - Small mines with fewer than 50 employees. - Large nonlongwall mines with 50 or more employees. - Longwall mines (mines with at least one longwall production face).

Jan 1, 1995

By Frank Matter

Production of ultrafine powders of industrial minerals has been a problem in the past. In recent years new wet and dry grinding stirred ball mill systems have emerged which have been commercialized Two such systems are the TRZK mill with double step air classifier for dry grinding and the NRZK mill for wet grinding The primary features of these mills are feed entering from top and the product along with the grinding media leaving from the bottom, and a media separation and recycle system A detailed description of the NRZK mill for grinding coal is presented

Jan 1, 1983

By George Asmus

Closed front, or open front for blast-furnaces, has been for a number of years a much discussed question among the furnace-men in every country where iron is made. As blast-furnaces are costly structures, and as the whole question is one of economy, I hope to be excused for entering a little into details. The "fore-hearth" is a prolonged opening in the lowest part of the hearth, from two to three feet wide, four to six feet long, and two to three feet high. It is a more or less fire-proof box, cooler than