The formation of broken coal whili miner works is analysed,the influence of cutting parameter to coal lump rate is discussed,some feasible waysto raise coal lump rate are put foreward.

• 分析了采煤机割煤时形成碎块的原理,就采煤机截割参数对原煤块率的影响作了探讨,提出了在现有的综采装备条件下,通过改变采煤机的截割方式,提高原煤块率的几条可行途径。