摘要
采用电厂粉煤灰为主要原料,制备了一种低成本的煤矿用充填材料。该材料体积膨胀率为25%,28 d抗压强度为2.05 MPa,可流动时间2 h以上,可以自流输送到充填工作面,完成充填,并实现自动接顶。
Fly ash discharged from power stations was used to prepare a kind of low-cost filling material for coal mines. The filling material, 25% of volume expansibility, 2.05 MPa compressive strength at28d, and than 2h flowing time, can flow automatically down to working faces and complete roof-contacted filling.
出处
《粉煤灰》
2011年第3期12-13,共2页
Coal Ash China
关键词
煤矿
粉煤灰
充填材料
coal mines
fly ash
filling materials
