摘要
本文分别测试了分级粗尾砂及分级细尾砂粒粒径组成,并根据测试结果,提出在分级粗尾砂中添加一定比例的细尾砂,改善尾砂粒径分布,从而制备出膏体充填料浆,其最佳添加比例为粗尾砂∶细尾砂=5∶5~6∶4;同时开展了充填料浆流动性试验、泌水率试验及强度配比试验,并根据试验结果,结合矿山生产实践,综合分析推荐充填工艺参数为充填浓度74%~76%、灰砂比在1∶4~1∶10之间,其不仅能够保障充填料浆安全可靠输送,且充填体28 d强度最高能够达到3 MPa以上,从而确保了回采的安全性;最终根据以上推荐的充填工艺参数,确定了充填工艺流程及系统方案,生产实践证明,此方案能够满足充填生产需求,充填系统运行可靠,工艺参数稳定,从而极大地提高了充填体质量,为进一步回采工作提供了安全保障,实现安全高效开采。
In this paper,the particle size composition of the classified coarse tailings and the classified fine tailings are tested respectively,and according to the test results,it is proposed to add a certain proportion of fine tailings to the classified coarse tailings to improve the particle size distribution of the tails,thereby preparing a paste backfill.The optimal addition ratio is coarse tailings∶fine tailings=5∶5 to 6∶4;at the same time,the spread test,bleeding rate test and compressive test of backfill slurry are carried out,and according to the test results,combined with the mining production experience,the recommended filling process parameters are as follows:the filling concentration is 74%to 76%;the cement-sand ratio is 1∶4 to 1∶10,which ensures the safe and reliable transportation of the filling slurry,and optimizes the strength of the backfill stope.Finally,according to the above recommended backfill process parameters,the backfill process and system plan are determined.Production practice has proved that this plan can meet the needs of filling production,the backfill system is reliable,and the process parameters are stable.It dramatically improves the backfill quality,provides a safety guarantee for further mining,and realizes safe and efficient mining.
作者
彭志华
郭利杰
赵越
杨超
PENG Zhihua;GUO Lijie;ZHAO Yue;YANG Chao(Yunnan Funing Boao Mining Co.,Ltd.,Funing 663400,China;BGRIMM Technology Group,Beijing 102628,China;National Center for International Research on Green Metal Mining,Beijing 102628,China)
出处
《中国矿业》
2022年第S01期392-395,共4页
China Mining Magazine
基金
国家重点研发计划项目资助(编号:2021YFE0102900)
国家自然科学基金项目资助(编号:52104131)
矿冶集团青年创新基金项目资助(编号:04-1926)。
关键词
膏体充填
分级粗尾砂
分级细尾砂
充填工艺方案
充填质量
paste filling
classified coarse tailings
classified fine tailings
backfill process
backfill quality
