méi kuàng / jīng guò / shāi xuǎn hòu / méi gān shí / huì / bèi / fēn lí chū lái / bìng / jí zhōng / duī fàng

煤矿经过筛选后，煤矸石会被分离出来并集中堆放。

After the coal is screened, the coal gangue is separated and stored in a centralized pile.