Browsing Mining Engineering by Title

Browsing Mining Engineering by Title

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  • A limit equilibrium fracture zone model to investigate seismicity in coal mines 
    Malan, D.F. (Daniel Francois); Napier, J.A.L. (John) (Elsevier, 2018-09-03)
    This paper explores possible synergies between techniques used to minimise seismicity in deep South African gold mines and their applicability to control coal bumps. The paper gives a summary of the techniques used in ...
  • A limit equilibrium model of tabular mine pillar failure 
    Napier, J.A.L. (John); Malan, D.F. (Daniel Francois) (Springer, 2021-01)
    An improved understanding of pillar strength and pillar failure mechanisms is required to optimize tabular mine layout designs. The paper describes the application of a limit equilibrium model for pillar failure analysis. ...
  • Matte - tap-hole clay - refractory brick interaction in a PGM smelter 
    Du Toit, J.; Cromarty, Robert Douglas; Garbers-Craig, Andrie Mariana (Southern African Institute of Mining and Metallurgy, 2016-04)
    Penetration of matte into tap-hole bricks causes detrimental refractory wear, which can lead to furnace breakouts. The ability of the tap-hole clay to form a protective layer on the brick, thereby limiting matte ...
  • Methods to suppress dust on open pit drill rigs 
    Du Plessis, J.J.L.; Potgieter, S.A.J. (Mine Ventilation Society of South Africa, 2016-07)
    Spotters and samplers working around surface drill rigs can be exposed to high dust concentrations. In this study it was found that individuals were exposed to as much as 14.2 mg/m3, which exceeds the Occupational ...
  • Mining through areas affected by abnormal stress conditions at Syferfontein Colliery 
    Legote, C. (Southern African Institute of Mining and Metallurgy, 2015-04)
    This paper investigates the conditions leading to the indefinite termination of production in four critical primary panels at an underground coal mining operation, the observed shortcomings in the mining approach, and ...
  • Mining with crush pillars 
    Du Plessis, Michael; Malan, D.F. (Daniel Francois) (Southern African Institute of Mining and Metallurgy, 2018-03)
    Crush pillars have been extensively applied on the Merensky Reef horizon since the late 1970s. Once in a crushed state, the residual strength of the pillar provides a local support function and must support the hangingwall to ...
  • Modelling and determining the technical efficiency of a surface coal mine supply chain 
    Budeba, M.D.; Joubert, Johannes Willem; Webber-Youngman, R.C.W. (Southern African Institute of Mining and Metallurgy, 2015-12)
    Determining the efficiency of a surface coal mine operation is an essential activity, which can help in deciding on the optimal use of input resources, including effective capital allocation, in generating a desired ...
  • Modelling the hydrogeochemical evolution of mine water in a decommissioned opencast coal mine 
    Huisamen, Altus; Wolkersdorfer, Christian (Elsevier, 2016-07)
    A method for the geochemical modelling of transient contaminant release from rehabilitated opencast coal mines, including calibration against existing data, is proposed. The need for such a methodology is illustrated by a ...
  • Modern cooling strategies for ultra-deep hydropower mines 
    Du Plessis, J.J.L.; Scott, D.; Moorcroft, H.E.S. (Mine Ventilation Society of South Africa, 2006-07)
    The increasing mining depths of South African gold mine deposits are resulting in ever-increasing heat loads associated with depth and the geothermal gradient. Together with changes in the mining horizons brought about ...
  • A Modified sequential grid layout to increase production rates in deep level hard rock mines 
    Jooste, Yolande (University of Pretoria, 2013)
    Scattered mining was practised on Kusasalethu Mine (previously Elandsrand Gold Mine) prior to 1998, but as mining proceeded deeper, it was no longer a feasible option. The scattered mining method would have resulted in ...
  • The need for improved layout design criteria for deep tabular stopes 
    Jooste, Yolande; Malan, D.F. (Daniel Francois) (Southern African Institute of Mining and Metallurgy, 2020-01)
    This paper was compiled to highlight the need for additional research in the area of layout design criteria for deep gold mines. It describes aspects related to two popular design criteria used in the deep gold mines of ...
  • Numerical computation of average pillar stress and implications for pillar design 
    Napier, J.A.L. (John); Malan, D.F. (Daniel Francois) (Southern African Institute of Mining and Metallurgy, 2011-12)
    A number of issues relating to the computational aspects of pillar design are addressed in this paper. The computation of average pillar stress values is important when attempting to establish criteria for pillar design ...
  • Numerical study of stability and connectivity of vertical goaf drainage holes 
    Khanal, Manoj; Poulsen, Brett; Adhikary, Deepak; Balusu, Rao; Wilkins, Andy; Belle, Bharath K. (Springer, 2021-03)
    During underground longwall coal extraction, overburden strata deformation may result in vertical goaf drainage holes, which are drilled in advance of mining for tail gate gas management, to fail. The performance of these ...
  • Optimising shaft pressure losses through computational fluid dynamic modelling 
    Kempson, William James (University of Pretoria, 2012-10-04)
    As a result of the rising electrical energy costs in South Africa, a method was sought to reduce the overall electrical consumption of typical shaft systems. A typical shaft configuration was analysed and the primary energy ...
  • Optimization of the load-and-haul operation at an opencast colliery 
    Pasch, O.; Uludag, S. (Southern African Institute of Mining and Metallurgy, 2018-05)
    The current coal mining climate is characterized by coal price volatility, political instability, high labour costs, and increasing operational costs. This is exacerbated by a steady decline in the growth of global coal ...
  • Optimizing shaft pressure losses through computational fluid dynamics modelling 
    Kempson, William James; Webber-Youngman, R.C.W.; Meyer, Josua P. (Southern African Institute of Mining and Metallurgy, 2013-12)
    As a result of the rising electrical energy costs in South Africa, a method was sought to reduce the overall electrical consumption of typical shaft systems. A typical shaft configuration was analysed and the primary ...
  • Organisational strategic drivers and core competencies applied in the South African mining sector 
    De Jager, F.C.; Steyn, Hendrik (Journal of Contemporary Management, 2013)
    This paper compares the organisational strategic drivers of a South African mining house with those of industries abroad. It furthermore compares the key competencies or capabilities of the mining house with those of the ...
  • Plan compliance process for underground coal mines 
    Angelov, A.A.; Naidoo, K. (Southern African Institute of Mining and Metallurgy, 2010-05)
    This paper presents a unique method of monitoring the effectiveness of the planning process as well as the execution of mine plans. The method primarily determines the degree of deviation from the original mine plans ...
  • Planning mechanised cave with coarse fragmentation In kimberlite 
    Bartlett, Patrick John (University of Pretoria, 1998)
    Premier Diamond mine had to plan, develop and operate a low cost, mass mining method to recover extensive ore reserves below a 75 metre thick, dipping gabbro sill. The mining method had to preclude the extraction of as ...
  • Predicting the efficiency of a surface coal mine for competitiveness 
    Budeba, M.D.; Joubert, Johannes Willem; Webber-Youngman, R.C.W.; Shafiee, Shahriar (Taylor & Francis, 2017)
    Mining is a competitive business with many players. The survival of a mine in the business is determined by its efficiency and cost-effectiveness relative to the other producers. Both new and operating mines should select ...