云南冶金2026，Vol.55Issue(4)：43-48,6.
深部薄变厚矿体组合式嗣后充填采矿方法应用研究
Study on Application of Combined Cut-and Fill Mining Method with Delayed Backfilling for Deep Ore Bodies with Variable Thickness from Thin to Thick
摘要
Abstract
Aiming at the problems such as poor adaptability,low efficiency and prominent potential safety hazards of the point-pillar upward horizontal cut-and-fill mining method applied to the mining of deep thin-to-thick variable ore bodies in Luodang Mining Area of Liangshan Mining Industry,an application research on the transformation from point-pillar upward horizontal cut-and-fill mining method to sublevel open stoping with delayed backfilling was carried out.A combined mining method adopting the"point-pillar mining for lower thin ore bodies and sublevel open stoping with delayed backfilling for upper thick ore bodies"scheme was constructed,forming an integrated mining framework featuring"low-dilution extraction of thin seams,formation of artificial load-bearing floors via consolidated backfilling,and high-efficiency extraction of thick seams".The applicable boundaries of the point-pillar mining method(ore body thickness＜8 m,mining depth＜500 m,production capacity＜300 t/d),transformation judgment criteria(ore body thickness＞10 m,mining depth＞500 m,required production capacity＞500 t/d)and key technical parameters(7-d backfill strength≥2 MPa,curing period of 7～9 d)were proposed.The core mechanism of"replacing point pillars with backfill bodies to construct artificial roof"was revealed.Engineering practice results show that The dilution rate fell from 10.61％to 4.37％,the ore loss rate decreased from 19.12％to 16.2％,the contract-awarding cost was reduced by about 30％,and the ore supply capacity was raised from 200 t/d to 800～1000 t/d.The research findings can offer engineering references for optimizing mining methods of deep complex ore bodies.关键词
深部薄变厚矿体/点柱式上向水平分层充填/分段空场嗣后充填/组合式采矿/适用边界Key words
deep thin-to-thick variable ore bodies/point-pillar upward horizontal cut-and-fill mining/sublevel open stoping with delayed backfilling/combined mining method/applicable boundary分类
矿业与冶金引用本文复制引用
周朝兰,邹竹能,李明洁,杜海瑞,吴山西..深部薄变厚矿体组合式嗣后充填采矿方法应用研究[J].云南冶金,2026,55(4):43-48,6.基金项目
云南省基础研究计划(202501CF070049) （202501CF070049）
