%0 Journal Article %T Rock properties and machine parameters evaluation at R?ssing Uranium Mine for optimum drill performance %A Adebayo %A B. %A Mukoya %A J.G.M. %J Journal of Power and Energy Engineering 电力与能源 %D 2019 %R 10.17159/2411-9717/17/155/2019 %K rotary drilling %K machine parameters %K rock properties %K penetration rate. %U http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532019000500009&lng=en&nrm=iso&tlng=en