Testing the rocks loosening process by undercutting anchors
Siegmund, Michał, Kalita, Marek, Bałaga, Domink, Kaczmarczyk, Krzysztof, Józef, Jonak
Energy Recuperation as One of the Factors Improving the Energy Efficiency of Mining Battery Locomotives
Polnik, Bartosz, Kaczmarczyk, Krzysztof, Niedworok, Andrzej, Baltes, Ralph, Clausen, Elisabeth