煤矸石是煤矿在采掘过程中排出井口的含碳物和岩石的混合物。重庆地区几个主要煤矿系二迭纪乐平煤系,排除的矸石分白矸和黑矸两种,白矸主要为掘进坑道时排出的石灰岩,黑矸就是在回采和延伸 Coal gangue is a mixture of carbonaceous matter and rock that the coal mine discharges at the wellhead during the excavation process. Several major coal mines in the Chongqing area are the Die Liping Coal Measures, which excludes two kinds of meteorite: white peony and black pecker. The white pheasant is mainly limestone that is discharged when the tunnel is excavated, and the black bream is used for extraction and extension.