Mine high strength round link chain is the main equipment of mechanized coal mining in coal mine, the conveyor chain on the scraper conveyor, which is the key and vulnerable part of the equipment. When the scraper conveyor is working underground, in addition to the cyclic bearing and tension, it will also be subject to contact fatigue, impact, bending, wear, corrosion, etc. Due to the influence of chain design, manufacturing, use and maintenance as well as service and working conditions, various chain failures (including stress corrosion and corrosion fatigue fracture) will occur, which will seriously affect the normal production of the coal mine and cause great economic losses to the coal mine.

The improvement of the service life of the mine high strength round link chain is a systematic project. In addition to improving the manufacturing quality of the chain, the correct use and maintenance of the mine high strength round link chain is an important measure to avoid the early failure of the chain and extend the service life of the chain.

Length measurement and matching of mine high strength round link chain in order to make the chain evenly stressed and extend the service life of the chain, the chain must be matched before installation. The accurate matching of chain is very important for the successful operation of conveyor. The tolerance of mining chain should be strictly controlled, and the tolerance of each ring should be less than 0.5mm. However, due to the large number of chain production and processing processes, the accumulation of errors will cause obvious length changes in the total length of the chain. If a long chain and a short chain work together, the load of the short chain from the driving sprocket wheel will increase. In order to avoid this kind of situation, all the chains must be strictly matched.