Determination of stresses in hoisting ropes in multi-rope friction hoists

Dynamic contact characteristics between hoisting rope and friction lining in the deep coal mine

“…1). Pull forces applied at both ends of the rope over the friction pulley induce the elastic deformation of each rope and the three-dimensional contact between the rope and corresponding groove, which cause the local slip between contacting components and specific local stress distributions throughout the contact region [6][7][8]. During hoisting in deep and ultra-deep coal mines, the changing vertical rope length and inertial load will result in the system vibration during a hoisting cycle (stages of acceleration, constant speed and deceleration), and thereby induce dynamic rope tensions [3,9,10].…”

Dynamic friction transmission and creep characteristics between hoisting rope and friction lining

“…With the development of deep mining and requirements of safe and efficient production in large modern coal mines, multi-rope friction hoist systems, with the large hoisting capacity, large hoisting height, high safety coefficient, low consumed power, small size and the low cost, are widely employed in deep and ultra-deep (N1000 m) mine hoisting [4,5].…”