Proper use and maintenance of mine wire rope

Proper use and maintenance of mining wire rope, not only related to the safety of shafts and lifting equipment, but also to extend the life of mine wire rope, so the use and maintenance of mining wire rope, we must comply with the "rules"

1. Use and keep the mine wire rope

The new rope should be checked by the inspection unit, after passing the safe custody, to prevent damage and corrosion.

The original data for each roll of wire must be kept intact.

Custody for more than 1 year, before the suspension must be carried out a test, qualified to use.

2. Roller on the mine wire rope and the number of rope and the provisions of the fixed

① The number of wire rope layers wound on drums of various lifting devices is strictly prohibited:

In the shaft of lifting personnel or lifting personnel and lifting materials, 1 layer; for lifting materials, 2 layers.

Inclined shafts are lifted personnel or lifts personnel and lifts the material, 2 layers; lift material, 3 layers.

During the construction of the lifts staff and materials, 2 layers.

In the case of a winch used in the production of a mine, if there is a transition wedge on the drum, the roller strength satisfies the requirements and the height of the drum is in accordance with the following Article 2, and the number of layers may be increased by 1 layer.

Mobile or auxiliary for the lifting of materials (including waste rock and to enhance the bridge, etc.) and during the drilling for the lifting of materials, allowing multi-layer winding.

② When winding two or more steel wires on the drum, the following requirements must be met:

The edge of the drum is higher than the height of the outermost layer of wire rope, at least 2.5 times the diameter of the wire rope.

The drum must be provided with a groove with a groove.

Mine wire rope from the lower to the upper section of the critical section (equivalent to the rope circle of the quarter of the length) must always be checked, and should be quarterly quarter of the rope to move the position of 1/4 rope.

In the case of a winches that are not covered with a rope groove, they may be used as long as the rope groove is engraved on the roller plate or the rope is used as a bottom rope.

③ When the rope rope head is fixed on the drum, it shall meet the following requirements:

Must have a special capacity or rope device, is strictly prohibited in the roller shaft.

Rope hole shall not have sharp edges, wire rope bending may not form an acute angle.

The drum should always be wrapped around the three lap rope, to reduce the tension at the fixed, but also must be reserved for regular testing with the supplementary rope.

3. There are provisions for the use of wire rope joints

① There are joint wire rope, only in the roadway transport equipment, 30 'below the inclined shaft Lane for the lifting material of the winch, inclined to the use of overhead equipment.

② in the use of wire rope in the inclined shaft, the length of the connection shall not be less than 1000 times the diameter of the rope.

4. The term of use of mine wire rope

If the wire rope is broken, the diameter is reduced and the degree of corrosion does not exceed the requirements of the "Regulations", but it can not be used for more than 1 year. If the wire rope is not used for more than 2 years, year.

5. Maintenance of mine wire rope

The main lifting device must be equipped with a qualified spare wire rope. On the use of wire rope, should be based on the conditions and corrosion of the well, at least once a month oil. Friction wheel lifting device to enhance the wire rope, only quasi-coated, immersion of special wire rope oil (by grinding fat); but do not bypass the friction wheel part of the wire rope, must be coated with anti-oil.

On the other aspects of mine wire rope maintenance work can not be ignored, such as the new rope after the experiment should be stored in the dark, rain, dry shed, the lower side with a wooden mat, so that the outer rope from the ground is not less than 0.2m , So as to avoid moisture. After storage every year before the rainy season to check once, such as the discovery of corrosion, should be a detailed examination and oil extraction. Handling to avoid contact with the ground, moving can not use iron bar to stee the rope, loading crane rope, are not allowed to be tied directly on the rope, unloading vehicles are not allowed to push down from the car.

6. Inspection and inspection of mine wire rope

(1) to improve the inspection of wire rope

① to enhance the wire rope, tank rope must be checked once a day, balance the rope, anti-dropper brake rope (including the rope) and the wellbore hanging wire rope must be checked at least once a week. - For easy damage and broken wire or corroded more of a section should be parking detailed inspection. The protruding part of the broken wire shall be cut at the time of inspection, and the inspection result shall be recorded in the wire rope inspection record book.

② a variety of stranded wire rope in a twist within the broken wire cross-sectional area and the total cross-sectional area of the wire, to achieve the following values, you must replace:

Lifting personnel or lifting personnel and materials used for wire rope 5%.

Designed for lifting the material with the rope, balance wire rope, anti-dropping brake rope (including the rope) is 10%.

Tank wire rope is 15%.

Overhaul crew, 25% for wire rope for conveyor belt conveyor and for wire conveyor.

③ to mine the nominal diameter of the wire rope to calculate the diameter of the reduction of the following values must be replaced:

Up to 10% of wire rope or brake wire rope.

Tank wire rope is 15%.

When using a sealed wire rope, the thickness of the outer wire is 50%.

④ due to coal mine under the large water, high pH, poor working environment, the use of wire rope after a period of time will appear color change, rust and pitting, wire rope tensile strength decreases, the safety factor of wire rope is difficult to achieve "rules" , So the wire rope steel wire black, rust, pitting and other damage, can not be used as lifting staff.

Steel wire rope serious corrosion, or pitting Ma pit formation of groove, or outer wire loosening, regardless of the number of broken wire or rope diameter changes, must be replaced immediately.

⑤ mining wire rope in the run by the cans, sudden parking and other violent tension, will have a great brake deceleration, the rope may be a serious distortion or deformation, broken wire increased, resulting in plastic deformation of the wire rope local thinning Or the length of the elongation, the mechanical properties of mining wire rope dropped sharply, then must immediately stop the inspection and found that one of the following circumstances, the force must be minced or replaced the whole rope:

The wire rope is severely distorted or deformed.

Broken wire exceeds the above Article 2.

The diameter reduction is greater than the provisions of Article ③ above.

The length of a section subjected to intense tension is more than 0.5% elongated.

During the use of mining wire rope, the number of broken wire suddenly increased or elongated suddenly accelerated, must be replaced immediately.

(2) inspection of wire rope

① the new mine with wire rope before the test and the periodic inspection of the rope must be carried out in accordance with the following provisions:

The test of the new rope before the suspension: must be for each mine wire for pull, bend and reverse the three tests, and the nominal diameter prevailing on the test results to calculate and judge. When the cross-sectional area of the unqualified steel wire reaches 6% of the total cross-sectional area of the wire, it shall not be used as a lifting person; when it reaches 10%, it shall not be used as a lifting material.

In the periodic inspection of the rope: can only do each wire pull and bend two tests, the test results are still based on the nominal diameter to calculate and judge. When the cross-sectional area of the unqualified steel wire is 25% of the total cross-sectional area of the steel wire, the wire rope must be replaced; the safety factor calculated as the sum of the tensile strength of the qualified wire is less than the stipulated (less than 7 for the lift person).

Lifting personnel and materials used for mining wire rope: lifting personnel less than 7; lifting material is less than 6. For the lifting of materials and suspension hanging with less than 5), the mine wire rope must be replaced.

② to improve the test of wire rope should be used to meet the conditions of equipment and methods, inspection cycle:

Lifting personnel or lifting personnel and materials used in the wire rope, from the suspension every 6 months after the test 1, hanging hanging wire rope, every 12 months test 1 times.

Lifting materials used in the wire rope, since the suspension from 12 months when the first test, after every 6 months test 1 times.

Friction wheel winch with wire rope, balance wire rope and diameter of 181nlTl and below for the lifting material for the wire rope (except for shaft lift rope), not subject to this limi