1. VENTILATION OF GASSY UNDERGROUND MINES IN THE KARVINÁ REGION
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VENTILATION OF GASSY UNDERGROUND MINES IN THE KARVINÁ REGION

2. VENTILATION OF UNDERGROUND MINES
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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

3. Main Principles of Mine Ventilation
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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

4. The amount of air which is brought in to the mine must provide
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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

5. "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

6. VARIOUS LOCATIONS OF MINE SHAFTS:
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VARIOUS LOCATIONS OF MINE SHAFTS:
Central system of ventilation
Diagonal system of ventilation
combined system of ventilation

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11. ACCUMULATION OF MINE GAS CH4
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ACCUMULATION OF MINE GAS CH4
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%

12. AUXILIARY VENTILATION
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AUXILIARY VENTILATION
All blind mine excavations which are not dug must be ventilated by auxiliary ventilation

13. KINDS OF SEPARATE VENTILATION
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KINDS OF SEPARATE VENTILATION
Separate ventilation is used for deaeration of long mine excavations using single 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

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