<正> Described the main environmental hazards occurring in Polish undergroundmines and their continuous growth in recent years as well as equipment and systemsw
<正> The regional strategy study was aimed at coal mine disaster control and prevention,which deepens and enriches the macro-strategy of coal mine disaster cont
<正>Noise from the machine on coal working face seriously influenced the miners' physical and mental health, and also, due to the noise, there may be a majo