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美国MAPCO煤炭公司的Mettiki煤矿的一台久益3LS型长壁采煤机从1985年开始使用,由于坚持做到按计划进行大修,并不断更新技术,到目前已经使用了13年,出煤2500万美吨,合2300万公吨。这个煤矿位于美国的马里兰州西部,是马里兰州最大的煤矿。主要采用久益的长壁设备进行生产。
A Proficient Type 3LS longwall shearer from Metcoki Mine at MAPCO Coal Company in the United States has been in use since 1985 and has been in continuous use for 13 years due to its insistence on planned overhaul and overhaul of 2500 Thousands of tons, combined 23 million tons. Located in the western part of the state of Maryland in the United States, the coal mine is the largest coal mine in Maryland. The main benefits of long wall equipment for production.