Abstract
1. From the results of pit investigations the authors have determined approximate values for the energy parameters of the effector units of a machine with high-energy percussive rock breaking. The effector unit of an entry-driving machine for hard rocks cutting workings 15 m2 in cross section should have an impact energy of 20,000 kgf·m and a frequency of 60 min−1. 2. The authors give analytical relations for the size of the effector unit and the frame of an entry-driving machine with high-energy breaking.
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