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All Journal Indonesian Mining Journal Journal of Applied Geology
Tapiwa Frank Kwachara Ngoroyemoto
Manicaland State University of Applied Sciences
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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OVERVIEW ON AN OPEN PIT MINE PLANNING OF THE PICKSTONE PEERLESS IN A VOLATILE ENVIRONMENT Tapiwa Frank Kwachara Ngoroyemoto; Charles Chewu; Desire Runganga; Tatenda Nyamagudza; Ashley Ruvimbo Sabao
Indonesian Mining Journal Vol 25, No 1 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 1, April 2022
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol25.No1.2022.1288

Abstract

The prevailing mining climate is highly characterized by unstable consumables pricing systems, a volatile economy and skyrocketing operational costs, and exacerbated by a steady decline and intermittence in the availability of electricity. Zimbabwean mines need to extensively capitalize on the opportunity to improve productivity by emphasizing variables they can control, predominantly operational efficiency to avoid resizing of operations or facilitating downsizing by relatively insignificant factors. In this study, cycle times, rig penetration, utilization, availability and payloads were used to evaluate the mining cycles, operator costs and the information was compared against the life of mine plans with block models. Shifts were restructured to be concordant to the schedule provided by the utility company to save fuel that was being used to power metallurgical plant. Several challenges have been identified as the principal reasons behind discrepancies between the theoretical capabilities of equipment were proven to be achievable by a trial schedule which reduced the 7 days/month to less than 2 days a month. The new schedule reflects a theoretical improvement of close to 25% and significantly lower operational costs. The current mining fleet is capable of meeting the stipulated targets and even achieving more even within tough working environments characterized by harsh load shedding schedules and volatile inflation rates; however, this requires stringent monitoring and evaluation of unit process. By adopting the recommended short term production plans will avoid resizing of operations as it automatically reduces the operational costs by US $3 million annually whilst coercing both operators and management to improve their operational efficiency.
Evaluating the Implications of Lineaments on Petroleum Fields: South Sumatra, Indonesia Tapiwa Frank Kwachara Ngoroyemoto
Journal of Applied Geology Vol 6, No 2 (2021)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1454.759 KB) | DOI: 10.22146/jag.58161

Abstract

Declining oil prices has led to a reduction of petroleum exploration as oil production as no longer a lucrative area of investment as in the previous years. Current exploration activities are supported by field work which are intensive considering the resources required. There is need to develop low cost methods to delineate areas of potential hydrocarbon resources. This research uses Land Satellite (Landsat) 8 Operational Land Imager (OLI) for alteration extraction, Shutter Radar Topography Mission (SRTM) for lineament extraction, Geological maps to develop a low cost method of petroleum exploration. The results indicate high OH bearing alterations on the Gumai and Kasai formation, a seal rock. Extensional tectonics is responsible for the migration of petroleum from the subsurface.  It is suggested that future exploration be concentrated on the Gumai and Kasai formation based on evidence of micro seepage.
Co-Authors Ashley Ruvimbo Sabao Charles Chewu Desire Runganga Tatenda Nyamagudza