Abstract
The paper examines specific features of designing a positioning and an emergency alert systems for people in underground coal mines as components of a multifunctional safety system in relation to the positioning accuracy and availability of operational communication between the traffic operator and a miner. It is shown that the practical value of a positioning system depends on the accuracy in defining people positions. In systems with high positioning accuracy, availability of twoway communication between the traffic operator and a miner is a useful feature. Such communication is arranged between the traffic operator's workstation and the miner's individual device and is supported by an uninterrupted radio field (Wi-Fi) inside the mine. A conclusion is made, that due to their design features not all of such systems that are currently used in mines meet the requirements of current Federal Norm and Rules, i.e. "Rules of safety in coal mines", and need to be updated or replaced.
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