超细中和渣高浓度胶结充填配比优化  

Proportion Optimization of High Concentration Cemented Backfill of Ultra-fine Neutralized Slag

作　　者：柯福祥 邱镜煌 李硕[2] 黄明清 Ke Fuxiang;Qiu Jinghuang;Li Shuo;Huang Mingqing(Zijin Mining Group Co.,Ltd.,Xiamen 361016,Fujian;Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350108,Fujian)

机构地区：[1]紫金矿业集团股份有限公司,福建厦门361016 [2]福州大学紫金地质与矿业学院,福建福州350108

出　　处：《福建冶金》2025年第3期19-23,共5页Fujian Metallurgy

基　　金：国家重点研发计划“高寒及生态脆弱区大型矿山绿色开采技术”(2022YFC2903900)。

摘　　要：针对卡林型金矿全尾砂胶结充填存在尾砂细度细、充填料浆流动性差、强度低的问题,采用三因素五水平正交试验开展“中和渣+废石+水泥”充填配比试验,并通过极差分析和回归分析探讨料浆浓度、废石掺量和灰砂比对充填体强度及流动性的影响。结果表明:充填料浆坍落度随料浆浓度的增加而减小,低浓度时随废石掺量增加变化不明显,但在浓度达到62%时,坍落度由13.9 cm提升到27.2 cm。在相同质量浓度下,充填体单轴抗压强度随灰砂比的减小而降低;在相同灰砂比下,充填体强度随料浆浓度的增大而加强;废石掺量对充填体强度影响较小。空场嗣后充填采矿法“中和渣+废石+水泥”的充填最佳充填配比为浓度62%,废石掺量40%,灰砂比1:6,此时料浆坍落度27.98 cm,充填体28 d强度0.93 MPa,可满足分段空场嗣后充填采矿法的料浆流动性与充填体强度要求。To address the issues of fine tailings particle size,poor fluidity of backfill slurry,and low strength in cemented tailings backfill for Carlin-type gold mines,a three-factor five-level orthogonal experiment was conducted to investigate the filling proportioning scheme using neutralization slag-waste rock-cement.Range analysis and regression analysis were employed to study the effects of slurry concentration,waste rock content,and cement-sand ratio on backfill strength and fluidity.The results indicate that the slump of backfill slurry decreases with increasing slurry concentration.At low concentrations,the slump shows negligible variation with waste rock content,but increases from 13.9 cm to 27.2 cm when the concentration reaches 62%.Under identical mass concentrations,the uniaxial compressive strength of backfill decreases with reduced cement-sand ratios,while increasing slurry concentration enhances strength at fixed cement-sand ratios.Waste rock content exhibits minimal influence on backfill strength.The optimal proportioning for open-stope subsequent filling was determined as 62%concentration,40%waste rock content,and a 1:6 cement-sand ratio.This configuration achieves a slurry slump of 27.98 cm and 28-day strength of 0.93 MPa,satisfying both fluidity and strength requirements for sublevel open-stope subsequent filling mining methods.

关 键 词：卡林型金矿 中和渣 充填配比优化 极差分析 回归分析 

分 类 号：TD853.34[矿业工程—金属矿开采]