Mine waste dumps constructed in mountain valleys

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Mots clés : Geotechnical engineering;Coal mines;Waste dumps;Hydrogeology;Hydrology;Water quality;Environmental control
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Publication: CIM Bulletin
Auteur(s): LEROY G. HAGENBUCH
Mots clés: Open-pit mining, Truck management, information system, Truck dispatch, Maintenance computers, Loading, Haulage, Downloading, Automated data gathering.
Numéro: 892
Volume: 79
Année: 1986
Texte
Sommaire: The planning and construction of prime coking coal beneficia-tion plants in the nationalized mines in India are reviewed. Flow schemes, construction practice, materials consumption, and costs are detailed. Medium-capacity beneficiation plants with multiple loops are recommended under Indian conditions.
Publication: CIM Bulletin
Auteur(s): D.D. BALI, S. CHATTOPADHYAY
Mots clés: Coal preparation, Coal washeries, Coking coal, Beneficiation plants, India.
Numéro: 892
Volume: 79
Année: 1986
Texte
Sommaire: The advantages and disadvantages of a mobile crushing plant with a belt conveyor system compared to a stationary crushing plant with haulage by heavy trucks are described. The capital expenditure and operational expenses are compared and the individual cost factors are explained.
Every open-pit mine or quarry, however, is different and has to be assessed and analyzed individually in order to find the optimum and most economical solution. Due to the high truck haulage costs, many open-pit...
Publication: CIM Bulletin
Auteur(s): HEINZ ALTHOFF, R.D. CLARK
Mots clés: Open-pit mining, In-pit crushing, Conveying, Belt conveyors, Truck haulage system, Capital expenditures, Costs
Numéro: 892
Volume: 79
Année: 1986
Texte
Sommaire: This paper is concerned with the problems inherent in the efficient and economical processing of the fine fractions of a coal from the Sulcis basin (Sardinia, Italy) whose characteristics are typical of low-rank coals occurring in the Mediterranean region. Three different techniques, based upon surface properties, are examined. Flotation can be very efficient from both a technical and economic point of view, provided care is taken in the modulation of the flotation pulp. Interesting results...
Publication: CIM Bulletin
Auteur(s): P. CARBINI, R. CICCU, C. DEL FA, M. GHIANI
Mots clés: Coal preparation, Beneficiation, Flotation, Low-rank coals, Coal processing, Oil agglomeration, Electrostatic separation, Sulas basin.
Numéro: 892
Volume: 79
Année: 1986
Texte
Sommaire: A number of highwall failures have occurred in some of the Alberta coal strip mines of a type called by the authors "Multiple block plane shear slope failure"<'>. They cause rapid deterioration of the dragline bench, reduced productivity and maintenance costs.
The failures are invariably associated with the presence of almost horizontal (± 5 degrees) bentonitic clay bands in the overburden, often immediately above the coal seam, and regress behind the slope as a series...
Publication: CIM Bulletin
Auteur(s): K. BARRON, B. STIMPSON, K. KOSAR
Mots clés: Slopes, Plane shear failure, Regressive failure, Coal strip mines, Rock mechanics, Open-pit mining.
Numéro: 892
Volume: 79
Année: 1986
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