立坑巻索の劣化の進行とその判定
1975 年 91 巻 1047 号 p. 335-339
詳細
1975 年 91 巻 1047 号 p. 335-339
A periodic inspection of a vertical shaft winding rope with the concentric construction equipped in a Koepe system was carried out by the electromagnetic method throughout its lifetime.
Various features of degrade of the rope resulted from repeated haulage, which may also be a characteristic of particular portion of the rope owing to the winding system, were explained.
Applying appropriate curing at every incident recognized on the inspection chart, approximately 250, 000 windings at the ultimate, which was far beyond the life expectancy, was attained consisting with the thorough safety, while the last three ropes in the same shaft had been renewed conventionally at 170, 000 windings or less
The rope tension, recorded in the vicinity of the head sheave through the rope travel, including various sequence such as an emergency braking, was also discussed standing on the intrinsic safety, referring to the electromagnetic inspection chart.
