Abstract
Abstract
The powered roof support is mainly used in natural hazard conditions. Natural hazards in Polish mining include methane hazards, gas and rock ejections, coal dust explosions, climate hazards, water hazards, landslides, eruptions, hydrogen sulphide hazards, radioactive substances hazards and rock mass tremors. The latter has a significant impact on the operation of powered roof support. The work analyses rock mass tremor risks in the last ten years. The study showed an intense increase in this hazard, which significantly affects the work safety of people operating machines and devices in mining excavations. The paper takes into consideration surveys carried out among employees working in conditions of rock mass shock risk. The purpose of the study was to obtain information on the safe operation of powered roof supports. The data allowed us to draw conclusions regarding the possibility of increasing work safety regarding rock mass shock risk conditions.