GRAIN BOUNDARY AND DISLOCATION MEDIATED DEFORMATION MECHANISMS IN NANOCRYSTALLINE METALS Copy

Bertie Meyer

VOLUME01ISSUE03

ABSRACT


The lower productivity in the mining industry is a great concern because Mines cash flows are negative and forces them to scale down operations or closes the operation. More activities added to the early examination process and therefore the mining cycle cannot be completed on a daily basis. The main reasons for this are lesser time spent on the working panels, due to long travelling distances and longer early examination time. The shorter time spent on the working fronts may lead to that, employees are taking short cuts that may lead to sub-standard work and lower outputs. There is a constant decrease in the blast efficiency of a shaft and travelling time is one of the major contributors to decrease in blast efficiency. This report investigates the idea of splitting stopping activities in the mining cycle. The splitting of stopping activities namely: Drilling, support, blasting, and cleaning can be operated on a continuous basis. A specific stopping activity takes place in a raise line and the activities follow each other when work in the raise line is completed. A two-shift roster is used to ensure an effective six hours on the working front and the remainder of the shift time is used for travelling to and from the shaft head. This splitting of activities ensures a continuous operation on the working panels; and completion of the stopping cycle on a daily basis. 

KEYWORDS


Activities, Travelling, Blast efficiency

REFERENCES


Meyer, LD., New Effective Labour Planning for Mines, PhD study

AUTHOR’S AFFILIATION


BERTIE MEYER
Department of Mining Engineering, University of Pretoria, Pretoria, South Africa.

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