关键词: 综采工作面, 块煤率, 块率滚筒, 爆破弱化

Abstract: In order to increase the lump coal rate of the fully-mechanized mining face, the shearer drum with high lump coal rate based on optimization of shearer parameter has been developed, combined with the actual situation of Yifeng Coal Mine. Moreover, the parameter and arrangement of coal wall presplit blasting of the mining face have been proposed. The experimental results have shown that: the lump coal rate of underground mining face increased 4.34% by adopting the shearer drum with high lump coal rate; the lump coal rate of underground mining face increased 14.22% by coal wall presplit blasting in the mining face; the lump coal rate of underground mining face increased18.56% by the combination of the shearer drum with high lump coal rate and wall presplit blasting in the mining face, which is the effective way to increase the lump coal rate of the fully-mechanized mining face.