Underground In The Cloud VENTILATION OF GASSY UNDERGROUND

"Underground In The Cloud" VENTILATION OF GASSY UNDERGROUND MINES IN THE KARVINÁ REGION

"Underground In The Cloud" VENTILATION OF UNDERGROUND MINES • IS BASIC FACTOR OF WORKERS´ SECURITY IN THE MINE ! • The main principle of ventilation of mines is : • Admission of fresh air (wind) to each place of work and to other mine excavation • All places of work in a mine have to be aerated properly

"Underground In The Cloud" Main Principles of Mine Ventilation • Admission of fresh air (wind) to each place of work and to other places in the coal mine • All places of work in a mine have to be aerated properly

"Underground In The Cloud" The amount of air which is brought in to the mine must provide • Breathing in the coal mine • Good microclimatic conditions • Sufficient rarefaction of gas in mine excavation to avoid exceeded accumulation of gas

"Underground In The Cloud" Mine ventilation of the whole mine in case of gassy underground must be artificial – exhaust fan • It is provided by mine fans which are situated on the mine surface • They are always two and have the same efficiency. One is running and the second is reserve

"Underground In The Cloud" VARIOUS LOCATIONS OF MINE SHAFTS: • Central system of ventilation • Diagonal system of ventilation • combined system of ventilation

"Underground In The Cloud"

"Underground In The Cloud"

"Underground In The Cloud"

"Underground In The Cloud"

"Underground In The Cloud" ACCUMULATION OF MINE GAS CH 4 • In working places where are or may be workers is the allowed amount to 1% • In places where it is not possible to reach by all possible technical equipment the accumulation to 1% a head of plant may allow an exception to 1. 5%

"Underground In The Cloud" AUXILIARY VENTILATION • All blind mine excavations which are not dug must be ventilated by auxiliary ventilation

"Underground In The Cloud" KINDS OF SEPARATE VENTILATION • Separate ventilation is used for deaeration of long mine excavations usingle ventilator and air boxes • Separate ventilation is divided according to the direction of wind circulation in air boxes: • a/ Separate ventilation – blowing ventilation • b/ Separate ventilation – suction mine ventilation • c/ Separate ventilation - compound ventilation

"Underground In The Cloud"

"Underground In The Cloud"

"Underground In The Cloud"

"Underground In The Cloud" THANK YOU FOR YOUR ATTENTION. Ing. Viktor Pavelka