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全尾砂微胶结充填性能研究
- 李海波|朱纪朋|蒋忠涛|陈新
- 作者单位：
- 栾川龙宇钼业有限公司|栾川龙宇钼业有限公司|中南大学资源与安全工程学院|中南大学资源与安全工程学院
基金项目：
- 国家自然科学基金项目(52204165)
详细信息：
- 作者简介：
- 李海波(1970—)，男，高级经济师，从事采矿技术管理、企业经营管理等工作；E-mail:lymyscjsb@126.com
- 通讯作者：
- 朱纪朋（1984—），男，高级工程师，从事采矿技术管理、科技创新管理工作；E-mail:elden670203@126.com
- PDF下载
Study on the micro-cemented filling performance of ungraded tailings
- English Author：
- Luanchuan Longyu Molybdenum Industry Co.,Ltd.|Luanchuan Longyu Molybdenum Industry Co.,Ltd.|School of Resources and Safety Engineering,Central South University|School of Resources and Safety Engineering,Central South University
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
对全尾砂微胶结处理，并充填至地下采空区是矿山处理尾砂的有效手段。介绍了小庙岭的充填系统，包括充填工艺流程、胶凝材料储存与输送方式及搅拌系统。对小庙岭全尾砂沉降性能和微胶结充填体抗压性能展开研究，结果表明:全尾砂矿浆浓度为10 %，SNF625V型絮凝剂添加量为30 g/t，全尾砂矿浆给料速度约为0.5 t/（m2·h）。随着料浆浓度提高，充填体强度提高；随着灰砂比降低，充填体强度降低；随着养护龄期增加，充填体强度增加。同时，在满足矿山充填工艺需求和成本的条件下，推荐小庙岭全尾砂微胶结充填的配比为灰砂比1∶15、料浆浓度68 %。
关键词:
单轴抗压强度；全尾砂；充填体；微胶结；抗压性能；沉降性能；强度规律
Abstract:
Micro-cementing ungraded tailings and filling them into underground goafs is an effective method for mine tailings disposal.The paper introduces the filling system of Xiaomiaoling,including the filling process,the storage and conveying of cementitious materials,and the agitation system.This study investigates the sedimentation performance and compressive strength of the micro-cemented filling material using Xiaomiaoling-s ungraded tailings.The results indicate that the optimal slurry concentration for ungraded tailings is 10 %,with an optimal addition of 30 g/t of SNF625V flocculant and a slurry feed rate of 0.5 t/(m2·h).As the slurry concentration increases,the strength of the filling body also increases;however,the strength decreases with a reduction in the cement-sand ratio.Additionally,the compressive strength of the filling body increases with the curing period.While meeting the mine-s filling process requirements and cost considerations,the recommended mix ratio for Xiaomiaoling-s micro-cemented filling with ungraded tailings is a cement-sand ratio of 1∶15 and a slurry concentration of 68 %.
Keywords:
uniaxial compressive strength;ungraded tailings;filling body;micro-cemented;compressive performance;sedimentation performance;strength regularity