Roak spoil removal system of mine surface is to ensure mine roak spoil removal requirement, and to realize a key link of coal production continued development of mines.
矿井地面排矸系统是保证矿井矸石排放需求，实现矿井煤炭生产持续稳定地增长的关键环节。
2
Also, the production technology of coal gangue cement and coalspoil bricks is introduced here.
介绍了煤矸石水泥和煤矸石砖的生产技术。
3
On the basis of analysis of activated silicon and aluminum components, a new smelting process of Si Al Fe alloy by use of coalspoil for replace a part of bauxite was proposed.