The results show that the addition of clay to the coal gangue in certain proportion can increase the content of fine particles as well as intensify the discontinuous distribution of particle groups.

• 在煤矸石中掺入一定比例的黏土，煤砰石在细小颗粒含量增加的同时，粒组不连续分布程度不同程度地存在加剧；