CONICAL PICK FAILURE EFFECT ON ROCK CUTTING PROCESS CONDITIONS
E. A. Averin1, A. B. Zhabin2, A. V. Polyakov2, Yu. N. Linnik3, V. Yu. Linnik3
1Skuratovsky Experimental Plant, Komsomolsky Settlement, Tula, Russia
2Tula State University, Tula, Russia
3The State University of Management, Moscow, Russia
Keywords: Conical pick, wear, failure, rock cutting, crash conditions, cutting force/feed force ratio
Abstract
The recommendations are given for conical pick patterns to prevent growing forces on neighbor picks of a failed pick. It is proposed to detect promptly pick failures by analyzing the burden variation in the transmission system of the cutting head. According to the theoretical calculations, when a pick fails, the relative growth of the feed force is not higher than the relative growth of the cutting force as against the increase in the burden as a consequence of change in the cut rock strength. This hypothesis was tested and proved during shafting at Talitsky site of the Upper Kama Potash-Magnesium Ore Deposit using shaft cutting machine 1SPKV-8.0.
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