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Bucket wheel excavators operating under difficult mining conditions including unmineable inclusions and geological structures with excessive mining resistance (BEWEXMIN)
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Bucket wheel excavators operating under difficult mining conditions including unmineable inclusions and geological structures with excessive mining resistance (BEWEXMIN)

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In newly-opened as well as existing lignite mines occur increasingly difficult mining conditions due to the presence of a growing number of unmineable inclusions and inclusions with an excessive mining resistance. During exploitation of such materials there are large dynamic and impulse loads. This results in frequent breakdowns and therefore exclusion of machines from normal operation. The aim of the project was to develop solutions to reduce failure rates of bucket wheel excavators working in such conditions. This could be achieved either by reducing the sensitivity of excavators on pulse load or by efforts to reduce the size of dynamic loads. Research in the BEWEXMIN project included three work packages. The first package included: experimental determination of the dynamic surplus from mass forces and linkage of these surpluses with physico-mechanical characteristics of exploited soils; method for determining alternative computational strength of pulse loads; determination of the requirements for flawless excavator work in specific conditions. In the second work package a way to create a system to monitor stress of excavator’s structures leading to continuous assessment of the degree of construction effort, signalling damage possibility, was created. The activities included in the third work package aimed to eliminate or reduce value of pulse loads caused by encountering unmineable obstacle by means of early detection of stones. All three WPs were interrelated and constituted a complete set of activities aiming at the same goal, which was to reduce failure rates of bucket wheel excavators operating in difficult mining conditions.
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ISSN 1831-9424
ISBN 978-92-76-42005-7
DOI 10.2777/875820
Catalogue number KI-NA-30-841-EN-N
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ISSN 1831-9424 ISBN 978-92-76-42005-7 DOI 10.2777/875820 Catalogue number KI-NA-30-841-EN-N
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