The combined method of speed key point monitoring and speed chart monitoring is advanced to prevent hoist overrolling,significantly improving the safety and reliability of mine hoist operation.
采用速度逐点监视和包络线监视技术，防止矿井提升机严重过卷，大大提高了提升机运行的安全性和可靠性。
Mine hoist
英语例句库
英语百科
Hoist (mining)
![A drum hoist (cables visible) and motor](/Images/godic/202501/27/Engine_House3850.jpg")
![A drum hoist and motor](/Images/godic/202501/27/Engine_House_-_Hoist_Drum3850.jpg")
![A headframe housing a friction hoist](/Images/godic/202501/27/Cliffs_Shaft_Mine_tower3850.jpg")
In underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with direct current drives utilizing solid-state converters (thyristors), however modern large hoists use alternating current drives that are variable frequency controlled. There are three principal types of hoists used in mining applications:
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