大直径深孔(高)阶段空场嗣后充填采矿方法改进实践

Improvement and practice of the large-diameter long-hole(high)level open-stoping with filling

草楼铁矿为了减少矿产资源损失并满足扩产要求,将大直径深孔阶段空场嗣后充填采矿法的回采高度由60m增大到105m,矿块宽度由30m增大到36m。现场试验表明,改进后的大直径深孔高阶段空场嗣后充填采矿法采切工程量小,工人劳动强度低,矿石回采率高,具有较好的经济效益。

To reduce mineral loss and meet the need of capacity expansion,the Caolou iron-ore mine used the method of large-diameter long-hole open-stoping with filling to improve the stoping level from 60m to 105m and ore block width from 30m to 36m.The field test shows that,after improvement,both the quantities of secondary development and working intensity of mine workers have been reduced,while the extraction ratio of ore and economic benefit have been improved.