Mining wire rope

Generally, there are the following types of mining steel wire rope

1, inclined shaft lifting with 6X7+FC and 6TX7+FC(face contact), 6X19S+FC and 6TX19S+FC, 6VX19+FC;

2, shaft lifting is generally used 6X26WS+FC 6X36WS+FC 18X7+FC 6VX34+FC 6VX37+FC 6X25TS+FC 6X28TS+FC, Guides rope is generally used to full locked cables.

3, vertical shaft friction lifting is generally used 6VX34+FC 6VX37+FC 6X25TS+FC 6X28TS+FC, Guides rope is generally used to full locked cables, flat balance rope is generally used flat wire rope P8X4X7 P8X4X14 P8X4X19, 34X7+FC, 35WX7.

Scrap of Steel wire rope for Mining

The scrap of mining wire rope should be carried out in strict accordance with the scrap requirements of Coal Mine Safety Regulations.

• Provisions on safety coefficient of steel wire rope in use: Steel wire rope in use of lifting device in Article 401 of Coal Mine Safety Regulations shall be inspected regularly.

• The service life of friction wheel lifting wire rope, etc. : Article 403 The service life of friction wheel lifting wire rope shall not exceed 2 years, and the service life of balance wire rope shall not exceed 4 years. If the wire rope is broken. The diameter reduction and the degree of rust shall not exceed the provisions of Article 405, Article 406, Article 408 of these Regulations, and may continue to be used, but shall not exceed 1 year. The wire rope of hanging water pump and rock grasping machine in the shaft is generally used for 1 year. Suspension of water pipe, air pipe, feed pipe, safety ladder and cable rope, the service life is generally 2 years. After expiration, if the degree of rust does not exceed the provisions of Article 408 of these Rules, it may continue to be used.

• Determination of steel wire rope inspection results: According to Article 402 of Coal Mine Safety Regulations, the inspection before suspension of new steel wire rope (including acceptance inspection) and the regular inspection of rope in use must be carried out in accordance with the following provisions:

(II) Regular inspection of rope in use:

1. When the ratio between the broken area of unqualified steel wire and the total broken area of steel wire reaches 25%, the steel wire rope must be replaced;

2. If the safety factor calculated by the sum of the qualified wire breaking force is lower than the provisions in Article 401 of this regulation, the wire rope must be replaced.

• The provisions of wire rope breaking: "Coal mine safety Regulations" 405 all kinds of strands of lay wire rope in 1 lay distance in the broken wire area and the total broken area of the steel wire ratio, reach the following values, must be replaced: (1) lifting personnel or lifting personnel and materials with steel wire rope 5%. (2) 10% of the steel wire rope specially used for lifting materials, balancing steel wire rope, brake steel wire rope of anti-fall device (including slow Okinawa) and steel wire rope traction belt conveyor that doubles as a carrier. (3) Guides wire rope is 15%. (4) 25% of the wire rope used for aerial passenger devices, wire rope traction belt conveyors specially used for the transport of endless rope and for the transport of materials.

• The provisions of wire rope diameter: "Coal Mine Safety Regulations" Article 406 with the nominal diameter of the wire rope as the calculation of the diameter reduction reaches the following values must be replaced: (1) lifting wire rope or brake wire rope is 10%. (2) tank passage wire rope is 15%. When the thickness of the outer layer of the sealing wire rope is worn up to 50%, it must be replaced.

• The provisions on how to deal with the steel wire rope when it is subjected to the violent tension such as canning and sudden stop: the 407 steel wire rope in the operation of the coal mine safety Regulations is subjected to the violent tension such as canning and sudden stop. It must be stopped immediately for inspection. If one of the following situations is found, the force section must be cut off or the whole rope must be replaced. (1) Serious distortion or deformation of the wire rope. (2) Broken wires in excess of Article 405 of these procedures. (3) The diameter reduction exceeds the provisions of Article 406 of these Rules. (4) The length of a section subjected to a violent tensile force extends by more than 0.5%. During the use of the wire rope, the number of broken wires increases suddenly or the elongation increases suddenly, so it must be replaced immediately.

• Steel wire corrosion in steel wire rope: "Coal mine Safety Regulations" Article 408 steel wire rope black, rust, other damage, shall not be used as lifting personnel. Wire rope corrosion or pitting pitting pit formation groove, or outer wire loose, do not judge the number of wire or rope diameter change, must be replaced immediately.

The main factors that decrease the strength of hoisting steel wire rope in mine are wear, rust and fatigue breaking. In general, these three factors appear and act simultaneously. Due to different mine conditions, the main factors are also different. Therefore, each mine should be according to the mine with this condition and use experience, and combined with the characteristics of various wire rope, reasonable selection of different types of wire rope.

The following points should be noted in the selection of mining lifting wire rope:

(1) When used in the shaft with large drainage and high pH, galvanized steel wire rope should be selected due to serious corrosion, and hot-dip galvanized steel wire rope should be used as far as possible, because the corrosion resistance of hot-dip galvanized steel wire rope is much better than that of cold plating (electro galvanized). Now the electric galvanizing is not as good as the corrosion resistance of oil.

(2) In the mine with serious wear, it is better to choose the thick line contact round strand and special-shaped strand wire rope or surface contact wire rope of the outer steel wire. Typical structure: 6*26SW, 6*31SW, 6*36SW, 4V*48S, 6V*39S, 6*K36SW

(3) With fatigue broken wire as the main cause of wire rope damage, the wire contact wire rope with small diameter difference between the inner and outer layers can be selected (which is better with filling type) or special-shaped wire rope. 6*25Fi, 6*29Fi, 4V, 6V triangle wire rope is good.

(4) It is better to lay the steel wire rope in the same direction for mine lifting. ZZ right hand twist, SS left hand twist

(5) Multi-layer non-rotating steel wire rope should be selected for shaft lifting. 18* 7,35 W*7. 18*7 is recommended for small specifications, because the operation is not standard, and the wire rope will not be scrapped due to stress. Large specifications as far as possible with 35W*7, but the operation must be standardized. This site has some wire rope specification operation please click to enter. If more demanding, can use 18* K 7, 35W*K7, this model is multi-layer strand contact wire rope.

(6) Rope with metal core can be used for lifting gangue hills with high temperature or open fire. There are generally two kinds of steel core, single strand steel core IWS: 1* 7,1 *19, 1*37,7*7 wire rope as a steel core: IWRC. The flexibility and tension of IWRC are better.

(7) It is best to use full locked cables and non-rotating wire rope for guides. If other types of steel wire rope are selected, galvanized steel wire rope is appropriate. This is also hot dip galvanized wire rope.

The practice has proved that the damage of wire rope used in shaft is mainly caused by fatigue wire breakage and corrosion, and wear is secondary.

Wear and rust are the main factors for damage of wire rope used in inclined shaft. For the mine with serious corrosion, corrosion and wear promote each other.

4, the meaning of the wire rope model 6T×31WS+IWR-32-1770 1.6 refers to 6 strands

2.T refers to each steel wire is trapezoid, is the surface contact wire rope

3.31WS indicates that each share is composed of 31 wires with different fine arrangement of steel wires. The outermost layer is Wallington type and the inner layer is Sirou type

4.IWR indicates steel core

5.1770 refers to the tensile strength of the wire rope 1770N/mm² 6.32 refers to the diameter of the wire rope