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本文阐述了久易技术有限公司4LS采煤机的研制和发展。这种机型在美国中厚煤层采煤机市场上独占鳌头。自从1986年投入市场以来,由4LS机型开采的原煤,累计已逾一亿四千三百万吨。在美国,井工开采的煤产量为三亿六千五百万吨/年,其中长壁釆煤产量占36%。在1986年运行的95个长壁工作面中,75%属
This article elaborates the development and development of 4LS Shearer of Jiuyi Technology Co., Ltd. This type of machine in the United States in the thick coal shearer came out on top. Since it was put on the market in 1986, raw coal mined by the 4LS has accumulated over 143 million tons. In the United States, the volume of coal mined underground is 365 million tons / year, of which 36% is produced from longwall coal mining. Of the 95 longwall facets operating in 1986, 75% belong