Calculation of hoisting mine ropes
Abstract
Currently used calculation of hoisting mine ropes for strength is clearly conditional in nature. This calculation is based on the so-called static safety factor, which represents the ratio of the breaking load to the static load (weight of the rope and end load). It goes without saying that in this method of calculation the dynamic load is not taken into account at all and the actual value of the safety factor (dynamic) remains unknown. It was natural to expect that the above provision led, for obvious reasons of caution, to somewhat exaggerated values of the safety factor, especially for deep mines, where the weight of the rope plays a significant role. Because of this circumstance, in American practice, the value of the said coefficient is set differentially, depending on the depth of the mine and the smaller the greater the said depth. Apparently, the working conditions of the rope in deep mines are considered more favorable in terms of the magnitude of stresses. It should still be pointed out that the latter statement, although more or less probable at first glance, is still not fully substantiated and, moreover, has as its starting point an assessment of stresses in the normal lifting mode.
References
- Savin G.N. Dynamic Theory of Calculation of Mine Hoisting Ropes. UAS, 1949.
- Ilyichev A.S. Review of existing theories on the calculation of mine ropes and the results of practical stress studies. Proceedings of the meeting on mine hoisting ropes. AS USSR, 1944, pp. 35-37.
- Tsvetkov V.A. Theory of Dynamic Stresses and Plastic Deformations of Steel Ropes and its Application in Engineering Practice. MacNII, 1948.
- Dinnik A.N. About dynamic stresses in the wire rope of the Kepe hoist at landing of the stand on the cams. Southern Engineer, 1917, No. 2-3.
- Dinnik A.N. About stresses in the hoisting rope at jamming of the stand. Southern Engineer, 1917, No. 4.
- Lokshin A.S. About dynamic stresses in hoisting ropes. Mining Journal (appendix), 1929, No. 12.
- Nesterov P.P. Methodology of calculation of mine hoisting ropes for fatigue strength. Notes of the UAS Fedorov Institute of Mining Mechanics, 1949, No. 7.
- Neronov N.P. About some issues connected with determination of stresses in hoisting ropes. Applied Mathematics and Mechanics, 1940, vol. IV, issue 2.
- Vyshomirskiy A. Metal hoisting ropes. PH Donugol, 1929, pp. 110.
- Nikolai E.L. To the Problem of the Elastic Line of Double Curvature. Petrograd, 1916.
- Bogolyubsky V.I., Golubev I.M., Amitin I.I. Wire Ropes. Reference book. GONTI, 1950, pp. 646-662