Abstract
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.
Highlights
Mine hoists are the key equipment in the transportation of mine shafts
The rope will wind on the drum by coil crossover and layer crossover. e winding radius in the period of coil crossover and layer crossover will change, which will result in the variation of the winded length of the rope and change the hoisting velocity and acceleration
The increments of the winded length of the rope during the coil crossover and layer crossover are small and constant, but the transition time during the periods will decrease with the increase of the rotating angular velocity, which will excite step changes of the hoisting velocity and acceleration and even excite load fluctuations. erefore, the present paper focuses on the investigation of dynamic load in the Blair mine hoist induced by drum winding
Summary
Mine hoists are the key equipment in the transportation of mine shafts. With the increase of the mining depth, a Blair mine hoist as shown in Figure 1 will be a good machine to be applied. Peng et al [1] have used the methods of differential geometry, mechanics, and mathematical analysis to study the movements of the crossover and derived the important formula that can reduce the vibration of cable on the drum during the course of crossover They have studied the transverse vibration characteristics of catenary ropes induced by crossover layouts of multilayer winding grooves in deep mine hoists [2]. Guo et al [8] have investigated the longitudinal and transverse dynamic responses of a wire rope under periodic excitation in a friction mine hoisting system by performing experiments with different periodic excitation frequencies; the results showed that the effect of excitation on the rope tension was not obvious. From the literature studies mentioned above, the longitudinal vibration responses of mine hoisting systems have been concerned by some scholars in considering different influence factors, but few literatures have focused on the load response induced by the motion of the rope on the LeBus drum that is usually applied in superdeep mine hoisting systems. erefore, a further research should be focused on the impact responses in superdeep mine hoisting systems induced by drum winding
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
