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Due to increasing efforts on saving natural environment – observed also as an increase of renewable resource energy production – a traditional underground coal mining introduces new technologies of machine diagnosis to assure this process to be more safe and generate less pollution. Also the economic reasons influence development of monitoring systems. Among the most important elements of underground coal mining are longwall systems, whose essential parts are powered roof supports. Avoiding failures and limitation of power consumption should result in more ecological underground coal mining. The paper presents the new model of powered roof support single unit work. The better understanding of its operating and the possibility to generate data describing a proper and improper operation will help to develop monitoring and diagnosis systems.

Gradual-Randomized Model of Powered Roof Supports Working Cycle