Methods and means of diagnosing the phenomenon of parametric resonance in the process of lifting vessels movement in the trenches of ore and coal mines

Abstract

One of the serious problems that occur during the movement of hoists in the vertical shafts of ore and coal mines is the necessity to avoid dangerous situations. The actuality of this theme is caused by highly aggressive conditions, which are present in mine shafts. Sooner or later these conditions significantly change the design parameters of reinforcement of shafts and especially the parameters of the system "hoist – runners". This situation is the consequence of the load on the runners by multiple cyclic movements of hoists, pressure on the shaft, intensive corrosion of the reinforcement. All of these phenomena in the complex may disrupt of linearity track movement of hoists in the shaft. The most dangerous consequences called "Parametric resonance" in the process of shifting the hoist along with the runner. The phenomenon of parametric resonance is capable within 1-3 seconds to disable reinforcement of the shaft and the hoist. Their restoration is an extremely difficult and timeconsuming process as it requires a full stop of work of the hoisting system of the mine for a long time and considerable expenditure of money and time to repair the reinforcement. Prevention of the occurrence of such a phenomenon is a very urgent task to ensure a trouble-free operation of the hoisting system of mines.