铜业工程Issue(6)：33-40,8.DOI:10.3969/j.issn.1009-3842.2024.06.005
金厂河多金属矿新型胶凝材料试验及质量评价
Test and Quality Evaluation of New Cementitious Materials for Jinchanghe Polymetallic Mine
摘要
Abstract
In order to solve the technical problems of slow consolidation speed,low backfill strength,and high cement consumption of backfill slurry in Jinchanghe polymetallic mine,an orthogonal experiment was designed for the composition of a new cementitious mate-rial by testing the physical and chemical properties of multi-source solid waste around the mine.The optimal formula of the new ce-mentitious material was obtained,which was ground granulated blast furnace slag∶gypsum∶lime∶activator=81∶8∶8∶3.Based on the coupling characterization of scanning electron microscope(SEM)and midinfrared photothermal(MIP)microscopy tests,the strength growth mechanism of new cementitious material backfill was revealed.In industrial experiments,new cementitious material backfill had complete in-situ coring and good bonding properties.The consolidation strength of 38d curing age reached 3.89 MPa,which was 2.78 times of strength of the cement coring backfill.On the basis of the strength design requirements of backfill,the cement-sand ratio at the bottom of the stope could be reduced to 1∶7,and the cubic filling slurry could be reduced by 28 Chinese Yuan.The research results can provide reference for the development of new cementitious materials for ultra-fine unclassified tailings.关键词
新型胶凝材料/充填试验/原位充填体/质量评价Key words
new cementing material/backfill test/in-situ backfill/quality evaluation分类
矿业与冶金引用本文复制引用
汪海峰,陈少伟,魏晓明,张雷..金厂河多金属矿新型胶凝材料试验及质量评价[J].铜业工程,2024,(6):33-40,8.基金项目
国家重点研发计划青年科学家项目(2021YFC2900600) （2021YFC2900600）
矿冶集团青年基金项目(04-2342)资助 （04-2342）
