Thesis (MScIngwet)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: The diesel consumption of haul trucks deployed on opencast mines was investigated as a
means of reducing the Total Cost of Ownership (TCO) of mining haul trucks. The
conceptualisation of TCO and an introduction to the mining operation was presented as an
introduction to the field of research. Thereafter, a review of the available literature revealed
that linear programming, queueing theory and coast-down testing were applicable means of
investigation. The relevant engineering sciences were applied and correlated with
experimental and measured data from the Grootegeluk, Sishen and Thabazimbi mines
operated by Kumba Resources Ltd (formerly known as ISCOR Mining).
A cost-driver model for diesel consumption was formulated by exploiting the expert
judgement of role players in the mining operation. A cost-driver model was developed for
the Sishen, Thabazimbi and Grootegeluk mines. The cost-driver models were then modelled
as a linear programming problem and solved using the student version of LINDO
Optimization Software. The results were discussed and a universal diesel cost driver model
was formulated by consolidating the individual diesel cost driver models.
The operational cycle of haul trucks was simulated in order to quantify equipment utilisation
and reduce diesel consumption of the mining vehicles. The operational cycle of haul trucks
was modelled utilising queueing theory. The simulation of the queue network was
implemented in Matlab using the next event advance method and was called Q Sim. Q Sim - -
was utilised to investigate optimal fleet size and the economies of scale of haul truck
capacity.
The results of coast down tests were analysed in order to determine the effect of treating
mining roads, with a bitumen product, on rolling resistance coefficient.
Finally, recommendations for further research are proposed. This includes further refinement
of the diesel cost-driver model, expanding the scope of application of Q_Sim in the mining
operation and further investigation of dust reduction by bitumen products. / AFRIKAANSE OPSOMMING: Ondersoek is ingestel na die dieselverbruik van myntrokke sodoende die Totale Koste van
Eienaarskap (TKE) van myntrokke te verminder. Die konsep rondom TKE is bespreek en 'n
inleiding tot die mynybedryf is aangebied sodoende die verskeie aspekte in verb and te bring.
'n Literatuur studie het gevolg, wat aangetoon het dat lineere programmeering, toustaan-en
loswieltoetse toepaslike navorsingsmetodes is om die nodige resultate te verkry. Daarna is
hierdie ingenieurswetenskappe toegepas en 'n vergelyking is tussen die eksperimentele en
gemete data van die Grootegeluk, Sishen en Thabazimbi myne getref.
'n Diesel koste-drywer model is opgestel met die insette van kundige rolspelers in die
mynbou bedryf. Dit het gelei tot Koste-drywer modelle vir die Sishen, Thabazimbi en
Grootegeluk myne. Die modelle is met lineere programmeering as probleemstelling
daargestel en is deur middel van die studente weergawe van die LINDO
optimaliseringssagteware opgelos. Die resultate was toe bespreek en daarvolgens is 'n
universele diesel koste-drywer model opgestel deur die reeds-geskepte modelle te
konsolideer.
Die operasionele siklus van myntrokke was gesimuleer sodoende die benutting van toerusting
te kwantifiseer en die dieselverbruik van myntrokke te verminder. Hierdie operasionele
siklus was gemodelleer deur middel van die toustaan-teorie. Die simulasie van 'n toustaannetwerk
was in Matlab gevoer deur Q_Sim te gebruik. Hierdie metode was gebruik om die
optimale vloot grootte en die invloed van myntrokkapasiteit te ondersoek.
Die ontleding van die loswieltoetse was gedoen om die invloed van In bitumen prod uk op
rolweerstand te bepaal.
Ten slotte is aanbevelings vir toekomstige navorsing bespreek. Dit behels die verder
aansuiwerings van die diesel koste-drywer model, die uitbreiding van aanwending van die
Q_Sim in die mynbou en 'n verdere ondersoek om stofvoorkoming in die mynbou te
bewerkstellig deur die gebruikmaking van bitumen produkte.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/21902 |
| Date | 12 1900 |
| Creators | Riley, Lennard Barry |
| Contributors | Taylor, A. B., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | v, 145 leaves : ill. |
| Rights | Stellenbosch University |
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