国内早期开发的露天煤矿多为倾斜煤层深凹露天矿,不能实现内排,开采结束后形成一个巨大的矿坑,露天矿停产后对边坡、地下水等不再进行维护,随着时间推移将会产生严重的地质环境灾害。回填露天矿坑是解决地质环境灾害的有效措施,利用正在生产的相 邻露天矿的剥离物作为回填物料,采用溜井或溜槽工艺进行回填,可充分利用物料重力进行运输,可极大地降低运输成本。以抚顺西露天矿坑回填工艺为例进行研究,提出了合理的回填工艺。

Many early surface coal mines in China are deep and concave open-pits, and do not fit for dump. They will become an enormous pit when the mine is closed. Because the slope and the groundwater can not be maintained, the open-pit would cause geological and environmental calamities. The backfill open-pit is an effective measure for resolving the problem. The overburden of the neighboring producing surface mine provides the backfill material, and with the launder technology, the material transportation will be carried out by the help of the material weight, with a greatly reduced transportation cost. As an example, the backfill technology of the FUSHUN west open-pit is studied, and the reasonable backfill technology is proposed.