关键词: 块煤率, 深孔预裂爆破, 采煤机滚筒改造, 螺旋溜槽, 转载点改造

Abstract: Summary：In order to improve the lump coal rate,According to thevarious factors that influence the lump coal rate Sunjia Cha Longhua coal mineCombined with the actual situation,the technical research is carried out to increase the lump coal rate at the source of raw coal and reduce the loss of lump coal in the transportation process. Such as coal face loose blasting, coal drum parameters optimization, crusher hammer height optimization, tape machine loading point transformation and installation of raw coal silo chute. The results show that after the technical research and application of lump coal rate on the basis of the original increase of 10% -12.5%. The effective implementation of the technology to the mine in the market downturn is still under the circumstances to achieve a better economic benefits, with a certain practical value.