Introduction to the use and replacement of mining wire rope

Introduction to the use and replacement of mining wire rope
At present, the wire ropes used in our mine are mainly shaft hoisting wire ropes, inclined shaft hoisting wire ropes, and monkey car wire ropes. Regarding the use time of wire ropes, Article 403 of the "Coal Mine Safety Regulations" has the following requirements: the use of friction wheel hoisting wire ropes The period should not exceed 2 years, and the use period of the balance wire rope should not exceed 4 years.
The use period of the steel wire ropes for suspending water pumps and rock grabbers in the wellbore is generally one year; the use period of the wire ropes for suspending water pipes, air pipes, feed pipes, safety ladders and cables is generally two years.
The "Safety Regulations for Coal Mines" does not specify the use time of the underground inclined shaft winch and the monkey car wire rope, but only stipulates the corrosion, broken wire, diameter and other aspects of the wire rope (attached)
At present, the inclined shaft winch of our mine is habitually replaced in accordance with the tradition of replacing once a year. Some steel wire ropes are qualified for more than one year according to the test conditions in use, but generally no more than 2 years; for the monkey car wire rope, generally follow the It is customary to add one year to the winch wire rope, that is, generally no more than 3 years.
 When the steel wire rope in use of the lifting device is regularly inspected, the safety factor must be replaced if it has one of the following conditions:
(1) Less than 7 specially designed for lifting personnel.
(2) Wire ropes for lifting personnel and materials: less than 7 for lifting personnel; less than 6 for lifting materials.
(3) Less than 5 specially designed for lifting materials and hanging hanging plates.

The ratio of the broken wire cross-sectional area of various stranded wire ropes to the total cross-sectional area of the steel wire within 1 lay length must be replaced when it reaches the following values:
(1) The wire rope used for lifting personnel or lifting personnel and materials is 5%.
(2) 10% of steel wire ropes specially designed for lifting materials, balance wire ropes, brake wire ropes (including buffer ropes) of fall arresters and wire rope traction belt conveyors that double as transporters.
(3) 15% of the steel wire rope of the tank road.
(4) 25% of the steel wire rope used in the overhead passenger device, the steel wire rope traction belt conveyor designed for the endless rope transportation and the material transportation.

 When the diameter reduction calculated based on the nominal diameter of the wire rope reaches the following value, it must be replaced:
(1) 10% for hoisting wire rope or braking wire rope.
(2) 15% of steel wire rope for tank road.
When the thickness of the outer steel wire of the sealed steel wire rope reaches 50%, it must be replaced.
When the wire rope is subjected to violent tension such as jamming or sudden stop during operation, it must be stopped and checked immediately. If one of the following conditions is found, the stressed section must be cut off or the whole rope must be replaced:
(1) The wire rope is severely twisted or deformed.
(2) Broken wire exceeds the provisions of Article 405 of this Regulation.
(3) The reduction in diameter exceeds the provisions of Article 406 of this Regulation.
(4) The length of a section subjected to violent tension is extended by more than 0.5%.
During the use of the wire rope, the number of broken wires suddenly increases or the elongation speeds up suddenly, and it must be replaced immediately.

When the steel wire of the wire rope is damaged by blackening, rusting, pitting, etc., it shall not be used as a lifter.
When the wire rope is severely corroded, or pitting pits form grooves, or the outer wire is loose, no matter how many broken wires or whether the rope diameter changes, it must be replaced immediately.