Mathematical model in fire-fighting network in underground coal mine  
Mikoś M., Ptak J., Wojciechowski J. Wojciechowski M.

S u m m a r y
Mathematical model of water network in the under- ground coal mine, which can be used to calculate parameters of the network depending not only on the water distribution but also on changes in configuration of installation was presented in the paper. By use of model the water stream values and pressure drops in every section of pipeline, and a pressure in interesting network points can be calculated.