摘要
针对浙江省常山县新昌乡岩前萤石矿17号矿体残矿回收过程中面临的地质条件复杂、采空区边界不清、顶板稳定性差等问题,本研究提出“精细化勘探—精准爆破—高效充填”的协同技术方案。通过坑内钻探与坑探工程相结合实现采空区精准定位,采用中深孔爆破工艺优化回采参数,并引入胶结充填技术提升充填体强度。工业试验表明,该方案使残矿回采率提升至85%以上,充填体7 d抗压强度达2.5 MPa以上,有效控制空顶暴露时间,实现了安全高效回采。研究成果为类似复杂地质条件下的残矿回收提供了可借鉴的技术路径。
Addressing the complex geological conditions,unclear goaf boundaries,and poor roof stability encountered during the residual ore recovery of the No.17 orebody in the Yanqian fluorite mine,Xinchang Township,Changshan County,Zhejiang Province,this study proposed a coordinated technical solution of“precise exploration-accurate blasting-efficient backfilling.”Accurate goaf positioning was achieved through a combination of underground drilling and tunnel exploration.Medium-depth hole blasting techniques were implemented to optimize recovery parameters,and cemented backfilling was introduced to enhance backfill strength.Industrial trials demonstrated that this approach increases the residual ore recovery rate to over 85%and achieves a 7-day backfill compressive strength exceeding 2.5 MPa.It also effectively controls roof exposure time,ensuring safe and efficient extraction.The research findings provide a replicable technical pathway for residual ore recovery under similar complex geological conditions.
作者
范文通
孙淳盘
张建军
FAN Wentong;SUN Chunpan;ZHANG Jianjun(Jinshi Mining Co.,Ltd.,Changshan 324200,China)
出处
《湖南有色金属》
2026年第1期1-5,共5页
Hunan Nonferrous Metals
关键词
残矿回收
萤石矿
精细化勘探
充填采矿
顶板稳定性
residual ore recovery
fluorite mine
precise exploration
cemented backfilling
roof stability
