DOI: 10.5593/sgem2012/s03.v1049


Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 1, 771 - 776 pp


The article discusses the replacement of continuous -operation transport equipment with
discontinuous-operation equipment. This basically means a change of the concept of
extraction from an active surface mine (open-pit mine), whereby TCII series continuous
- operation equipment on the working levels on 3 overburden benches on the worked
front will be replaced with discontinuous-operation equipment having the required
capacity as part of overburden stripping for reclamation. This causes a different
distribution of the working levels on each of the overburden benches, which currently
include the protective zone at the foot of each of the overburden bench, where the
security zone needs to be preserved, the working level with the extraction plant itself,
and lines ensuring safe operation. The change of technology results in a different
structure of the layers and grading of each of the working stopes while preserving the
required general slope of the pit.
The article also describes the approach to overburden stripping for the purpose of
reclamation when the equipment is replaced as above indicated, and how this change
will influence the advance of the working face in terms of the square area of the open
pit and the recoverable coal reserves while observing the applicable legislative
requirements. For the actual evaluation, a SWOT analysis of the two technological
concepts, including the economics of the operation from the perspective of time, will
have to be carried out at a later stage.
The individual profiles of advancing working faces are shown to illustrate the change in
the actual advance of working; the options for the calculation of increased coal
production, which is then reflected in the pricing policy, are estimated.
The proposal presented respects the conditions set out in POPD (Development and
Working Advance Plan) with regard to the safety of operations and employees.

Keywords: mining technology, working horizons, digging height