The Coal Mine Safety Code stipulates the inspection and inspection cycle and content of steel wire rope

In the process of technical service of coal mine safety inspection, many leaders of mechanical and electrical transportation departments did not seriously study the inspection cycle and content of steel wire rope specified in the coal mine safety regulations, and did not master the inspection cycle and content of steel wire rope. Therefore, I sorted out the leaders and management personnel of coal mine electrical transportation, and inspected and inspected them on schedule.

1、 Inspection of new wire (410):

1. After the arrival of the steel wire rope, the performance inspection shall be carried out.

2. The factory certificate, acceptance inspection report and other original data of each steel wire rope shall be kept intact.

3. The steel wire rope stored for more than 1 year must be subject to performance test before hanging, and can be used only after passing the test.

4. Before hanging the steel wire rope, each steel wire must be tested for breaking, bending and torsion, and the test results shall be calculated and judged based on the nominal diameter:

① If the ratio of the sectional area of unqualified steel wire to the total sectional area of steel wire reaches 6%, it shall not be used for lifting personnel; Up to 10%, it shall not be used for lifting materials.

② When the safety factor of steel wire rope is less than that specified in article 408 of this specification, the steel wire rope shall not be used.

5. The main lifting device must have qualified spare steel wire rope.

6. The steel wire rope with diameter no more than 18mm, which is specially used for lifting materials in inclined shaft, has product certificate and inspection report. If there is no corrosion and damage in appearance inspection, the inspection required in 1 and 2 can be omitted.

2、 Inspection of wire ropes in use (article 411)

1. The performance inspection of the winding hoisting wire rope for lifting personnel or lifting personnel and materials shall be conducted every 6 months after the self hanging use; The steel wire rope hanging the hanging tray shall be inspected once every 12 months.

2. The winding lifting steel wire rope for lifting materials must be subject to the first performance inspection within 12 months of suspension use, and then every 6 months.

3. For the periodic inspection of winding hoisting steel wire rope, only two kinds of tests can be carried out: breaking and bending of each steel wire. The test results shall be calculated and determined based on the nominal diameter. The steel wire rope under the following conditions must be stopped from use:

① When the ratio of the sectional area of unqualified steel wire to the total sectional area of steel wire reaches 25%;

② When the safety factor of steel wire rope is less than that specified in article 408 of this specification.

4. Friction type lifting steel wire rope, overhead passenger device steel wire rope, balance steel wire rope and steel wire rope with diameter no more than 18mm specially used for inclined shaft lifting materials are not limited by 1 and 2.

5. The lifting steel wire rope must be checked once a day, and the balance steel wire rope, tank track rope, anti falling device brake rope (including buffer rope), overhead passenger device steel wire rope, steel wire rope traction belt conveyor steel wire rope and shaft suspension steel wire rope must be checked at least once a week. For the section that is easy to be damaged, broken or corroded, it shall be stopped for detailed inspection. The protruding part of the broken wire shall be cut off during inspection. The inspection results shall be recorded in the wire rope inspection record book.

6. For the steel wire rope in use, anti-corrosion measures shall be taken according to the roadway conditions and corrosion conditions. The friction transmission section of the friction hoisting steel wire rope shall be coated and soaked with special steel wire rope friction increasing grease.

7. The length of the balance steel wire rope must adapt to the overwinding height of the lifting container to prevent damage to the balance steel wire rope during overwinding. When using the round balance wire rope, there must be a device to avoid the kink of the balance wire rope.

8. Do not immerse the balance wire rope in water.

9. The difference between the tension of any steel wire rope lifted by multiple ropes and the average tension shall not exceed ± 10%.

The mechanical and electrical transportation departments of each coal mine shall arrange full-time or part-time managers to manage the steel wire rope, improve the steel wire rope management system, clarify the inspection and inspection contents, establish the steel wire rope inspection management account, and ensure the inspection and inspection on schedule.