DETERMINATION USING FEA OF THE STATIC STRESS OF A MINE HOIST DRUM AFTER SAFETY BRAKING.

Mine winding systems are a complex set of machines, devices, and mechanisms, which work together both to transport useful mineral substances or tailings from the mine to the surface or to other horizons, as well as to transport personnel, materials, and equipment, from surface to underground. The mine winding systems consists of the actual mine hoisting machine, the head-frame, cables (ropes), conveyances, auxiliary equipment, control and safety devices. The braking system can operate as service brake or safety brake. The service brake acts on the rope wheel to achieve the required tachogram, while the safety braking occurs independently of the operator's will, in the following situations: the lack of power supply, the decrease in the pressure of the hydraulic fluid, over winding of the conveyances, exceeding the maximum permitted extraction speed. A functional condition imposed on the brakes of a mine windings system is to ensure the immobilization of the conveyances after a safety braking. This paper proposes a study of the stresses and deformations to which the drive wheel drum of a single-rope friction mine hoist is subjected to, when it must keep the conveyances immobilized following a safety braking. To solve the mentioned problem, a virtual model of the drum of such an installation was created in SOLIDWORKS. [ABSTRACT FROM AUTHOR]