义桥煤矿矸石不升井“采选充”一体化开采设计

Integrated mining design of coal mining separating and filling for gangue non-lifting in Yiqiao Coal Mine

针对义桥煤矿建筑物下压煤开采、地面矸石处理困难等问题,通过理论分析、方案比较、设备选型等方法,提出了井下矸石智能分选后不升井方案,研究了井下矸石充填开采技术,选择了合适的分选及充填设备,确定了密实胶结充填材料采用水泥、粉煤灰、水、矸石,其配比为1∶1∶2.57∶20,充填体强度大于2.98 MPa,充填工作面生产能力为13万t/a,形成了一整套“井下矸石不升井‘采选充’一体化”开采系统,工程应用表明,该系统满足了矿井建筑物下压煤开采要求,解放了建筑物下压煤资源量,消化了矿井矸石,实现了义桥煤矿绿色开采的要求。

Aiming at the dficulty in coal mining under constructions,ground gangue handling of Yiqiao Coal Mine,a mining scheme was proposed through theoretical analysis,scheme comparison,and equipment selection,in which non gangue as lifted after underground intelligent separation.The underground gangue flling mining technology was studied,and the appropriate separating and flling equipment as selected.The cement,fly ash,water and gangue which proportioning 1:1:2.57:20 was confirmed as the dense cementitious flling material,the strength of the filling body was greater than 2.98 MPa,the production capacity of the filling working face was 13000/a,a whole set of underground mining-separating-flling system was formed,with which no gangue was lifted.The engineering application showed that the system satisfied the requirements of coal mining under constructions,liberated the amount of coal resources under construction,digested the mine gangue,and realized the requirements of green mining in YiQiao Coal Mines.