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Abstract
The demand for quick and economic excavation methods in mining and civil engineering tunnelling projects has led to an increase in the level of mechanisation. Despite the higher cost of boom-type roadheaders and associated equipment, compared with drill-and-blast methods, mechanised techniques have proved cheaper due to improved rates of advance and reduced accidents. When using uniaxial compression strength as a parameter for rock classification, boom-type roadheaders can cut rock up to 100 mpa and exceptionally up to 150 mpa. The aim of mechanised roadheading is to introduce overall mechanisation of the necessary working cycles which implies comprehensive roadheading systems including essential equipment and machinery.
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