Blair mine hoists powered by drum winding are a key equipment in the transportation of a superdeep mine shaft. The step changes of hoisting velocity and acceleration caused by coil and layer crossover of rope winding on the LeBus drum, which will excite impact responses of hoisting systems, cannot be ignored in the hoisting system with high velocity. The paper focuses on investigating the effect of drum winding on impact responses of superdeep mine hoisting systems. Firstly, the hoisting velocity and acceleration were precisely modelled and calculated according to the structure of rope groove of the LeBus drum; secondly, impact responses of the dynamic displacement and load were obtained by applying the established model; eventually, an experiment was performed, and then, the validity of the established model and the response mechanism was verified. The paper will provide good technical support for the design and optimization of the mine hoists in superdeep mine shafts.

Mine hoisting systems have been widely used in coal mine industries. Due to a series of uncertain faults in the steel guide, serious vibrations will be excited during the operation of the machine, which will seriously influence the stability and safety of the system. In this paper, a semi-active vibration control strategy based on magnetorheological dampers was innovatively proposed. Firstly, a reasonable simplified dynamic model of mine hoisting system was established. Secondly, the simulation results from the virtual prototype model were used to verify the rationality of the established dynamic model. Then, a fuzzy skyhook damping semi-active control scheme based on magnetorheological dampers was designed. Finally, the availability of this vibration control scheme was verified by the Adams/Simulink co-simulation technique. The root mean square (RMS), mean and maximum values of the horizontal vibration acceleration of the container were reduced by 47.32%, 22.50% and 35.39%, respectively. The fuzzy skyhook damping semi-active control strategy of good stability can well suppress the horizontal vibrations of the mine hoisting system.INDEX TERMS Semi-active control, fuzzy skyhook damping control, magnetorheological dampers, mine hoisting systems.