SYSTEMS MONITORING OF NATURAL HAZARDS IN THE HARD COAL MINES IN POLAND
Natural hazards such as rock bumps, methane, coal dust explosions, airborne respirable dust, outbursts of gas and rocks, water, radiation caused by natural radioactive materials, spontaneous fires, and climatic hazards, occurring in the Polish hard coal mines, should be controlled. These hazards are characterized by different scale levels numbered from 2–5. To recognize the amount and levels of hazards, research works were carried out in 109 mining districts of mines belonging to Jastrzębska Spółka Węglowa, Katowicki Holding Węglowy and Kompania Węglowa. These are 86 % of all mines and could be regarded as representative of the majority of Polish mining. The hazards have been classified as regards the frequency of their occurrence as: commonly occurring – with a frequency of 100 % (like airborne respirable dust and fire hazards), high occurrence frequency – frequency from 60 to below 100 % (methane hazard – 83.5 %, coal dust explosion hazard – 92.0 %, and water hazard – 99.1 %), medium occurrence frequency – from 30 to below 60 % (rock-bump hazard – 52.3 % and climatic hazards – 51.4 %), and episodic occurrence frequency – below 30 % (outburst of gas and rocks and radioactive hazards).
Hazard; methane; Mines; Mine; Rock; Rocks; mining; Coal;