我国采煤机械化的发展已经历了对年历程，由打眼放炮、半机械化、机械化及综合机械化发展到高产高效综合机械化，取得了巨大的成就。在采煤机械方面，对我国国有重点煤矿机型使用情况的统计表明，在综采工作面中，由上海分院设计的MG系列采煤机占36．27％，AM500系列采煤机占18 The development of mechanization of coal mining in our country has gone through the course of the year, and has achieved great achievements in the development of comprehensive mechanization of high production, high efficiency and efficiency by drilling, semi-mechanization, mechanization and comprehensive mechanization. In coal mining machinery, statistics on the use of key state-owned coal mines in China show that in the fully mechanized coal mining face, the MG series shearer designed by Shanghai Branch occupies 36.27%, the AM500 series shearer accounts for 18%