Modelling and Resource Estimation of a Thin-Layered Lignite Deposit

APCOM 2009
Christos J. Kolovos,
Abstract The lignite deposits of the Amyntaio-Ptolemais basin in North West Greece (western Macedonia) present a difficult modelling problem. Each deposit consists of several thin lignite layers ranging from a few centimetres to a few tens of centimeters in thickness, and thin intercalated sterile layers of marly limestones, marls, clays, and sands. The lignite layers are practically impossible to model individually due to the lack of reliable and detailed stratigraphic correlatation, leading to compositing methods being applied prior to any interpolation and modelling. The complexity of the deposit is further increased by the presence of a number of faults. This paper presents the modelling and estimation procedures applied during the most recent study of the South Western Field – a new deposit that is considered for development and lignite production over the next years and will support the operation of a new power station in the area. Special focus is given to drillhole database structuring, fault modelling, stratigraphic correlation, mineable lignite intervals compositing, and resource estimation. The use of specialised mine planning software in all stages of modelling and estimation is thoroughly explained.
Keywords: Resource estimation, Mine planning, stratigraphic modelling, fault modelling, Lignite
Full Access to Technical Paper
PDF version for $20.00
Other papers from APCOM 2009