Browsing Mining Engineering by Title

Browsing Mining Engineering by Title

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  • 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 ...
  • Preliminary investigation on using IS approved real time dry bulb and relative humidity sensors in underground coalmines 
    Khanal, M.; McPhee, R.; Belle, Bharath K.; Brisbane, P.; Kathage, B. (Springer, 2019-01)
    A review of various real time temperature monitoring devices available for use in underground coal mines in Queensland was conducted. To investigate the fit-for-purpose of the intrinsically safe (IS) instrument, laboratory ...
  • A preliminary qualitative evaluation of a hydraulic splitting cylinder for breaking rock in deep-level mining 
    De Graaf, Wolter Willem; Spiteri, William (Southern African Institute of Mining and Metallurgy, 2018-08)
    Hydraulic rock-splitting cylinders have proved successful in numerous civil and construction applications. The purpose of this study was to conduct a preliminary qualitative evaluation of the applicability of the ...
  • The presence of shear stresses in pillars and the effect on factor of safety in a room-and-pillar layout 
    Maritz, J.A. (Jan) (Southern African Institute of Mining and Metallurgy, 2014-12)
    Since the dawn of mining, pillars have been used as primary support to ensure stable workings. Early designs were based on trial and error, after which more scientific means developed over time. A vast amount of progress ...
  • A proposed approach for modelling competitiveness of new surface coal mines 
    Budeba, M.D.; Joubert, Johannes Willem; Webber-Youngman, R.C.W. (Southern African Institute of Mining and Metallurgy, 2015-11)
    Cost estimation for surface coal mines is a critical practice that affects both profitability and competitiveness. New mines require these costs to be estimated using available information before a project begins. ...
  • Re-aligning the cutting sequence with general support work and drafting a support sequence at Simunye Shaft 
    Lombard, K. (Southern African Institute of Mining and Metallurgy, 2015-04)
    ‘Roof support awaiting time’ (RSAT) is a term used at Goedehoop Colliery’s Simunye Shaft to describe the potential production time lost due to the continuous miner (CM) standing idle waiting for roof support to catch ...