充填新技术在甘肃厂坝铅锌矿改扩建工程中的应用

由于民采活动在厂坝、李家沟采区的掠夺式开采,对厂坝和李家沟矿床造成了严重的破坏,共形成约300万m3采空区。为了矿山安全持续生产,需要进行矿山资源整合,解决以下问题:1)采空区安全;2)柒家沟废石场排废能力不足;3)尾矿库安全库容不足及尾矿坝安全;4)生产实际损失、贫化率均较高。设计新建300万t/a充填系统。经充填试验研究最终确定全尾砂+细石+水泥充填工艺,井上搅拌及井下细石添加搅拌的膏体泵送系统。

Application of new backfill technology in expanded construction of Changba Lead-Zinc Mine in Gansu province

Since 1986, plunderable private mining is occurred in Changba and Lijiagou mining areas of Changba Lead-Zinc Mine, which caused severe damage to Changba and Lijiagou Mine, the volume of goaf is almost 300×104 m3. Resource integration aims to safety-sustainable production and goaf safety, insufficient volume of Qijiagou waste stockpile, not enough storage capacity of tailings dam and its safety, high loss and dilution are urgently to solve in integrated Changba Mine. 300×104 t/a capacity of backfill system is planned to construction, unclassified tailings+fine stone+cement backfill process, stirring on the ground and fine stone adding mixing underground of paste pumping system is applied according to experimental research.