复合骨料膏体充填料浆管道输送阻力及其压力监测研究  

Research on flowing resistance and pressure monitoring in conveying pipeline of paste filling slurry with composite aggregate

作　　者：陈鑫政 蒋合国 杨小聪 许文远 沐兴旺 唐琳 魏筱乐 徐成金 CHEN Xinzheng;JIANG Heguo;YANG Xiaocong;XU Wenyuan;MU Xingwang;TANG Lin;WEI Xiaole;XU Chengjin(BGRIMM Technology Group Co.,Ltd.,Beijing 102628,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China;Yiliang Chihong Mining Co.,Ltd.,Zhaotong 657600,China)

机构地区：[1]矿冶科技集团有限公司,北京102628 [2]国家金属矿绿色开采国际联合研究中心,北京102628 [3]彝良驰宏矿业有限公司,云南昭通657600

出　　处：《中国矿业》2025年第4期107-115,共9页China Mining Magazine

基　　金：国家重点研发计划项目资助(编号:2022YFC2904103)。

摘　　要：毛坪铅锌矿采用尾砂+机制砂复合骨料进行膏体充填,充填输送管道垂直落差超过600 m,水平管线长度超过5000 m,属于高垂差、长距离充填输送范畴,确保膏体料浆的稳定输送是矿山充填的关键。为解决矿山充填中堵管、爆管频发的问题,提高充填钻孔满管率和输送稳定性,通过测试得到尾砂、机制砂的物理参数及尾砂+机制砂复合骨料膏体料浆的流变参数,利用复合骨料膏体料浆的流变参数理论计算出充填料浆管道输送的比摩阻,并基于伯努利方程推导出计算钻孔内料浆高度的解析公式。进一步地,通过在毛坪铅锌矿河东矿区610 m中段水平充填管道上安装压力监测装置,开展复合骨料膏体料浆管输压力监测研究,实测充填料浆的管输压力分布规律。结果表明:充填料浆处于层流/过渡流时,基于Buckingham公式推导的比摩阻理论计算具有较高的准确性。当充填流量为60 m3/h,充填料浆配比为灰砂比1∶4,充填浓度76%时,充填料浆的比摩阻为5392 Pa/m,且当充填倍线为2以下时,充填过程中钻孔内料浆满管率低于50%。充填工程实践中,矿山通过优化管路布置提高充填倍线,提高充填流量和料浆质量浓度,缩小管径提高比摩阻及增加局部损失等措施提高充填满管率,研究成果对国内类似矿山充填系统参数设计与稳定性调控具有借鉴意义。Maoping Lead-Zinc Mine utilizes composite aggregates of tailings and manufactured sand for paste filling.The filling pipeline system features a vertical drop exceeding 600 m and horizontal pipelines over 5000 m in length,belonging to the category of high vertical drop and long-distance paste filling.Maintaining the stable transport of paste slurry is vital for mine backfill operation.To address frequent pipeline blockages and bursts and improve the filling borehole full-pipe ratio and transport stability,the physical parameters of tailings and manufactured sand and the rheological parameters of paste slurry using tailings and manufactured sand as composite aggregate are obtained through test.Based on the rheological parameters of composite aggregate paste slurry,the specific frictional resistance of filling slurry conveying in pipeline is calculated,and the analytical formula of slurry height in borehole is deduced by Bernoulli equation.Furthermore,pressure monitoring devices are installed in the horizontal filling pipeline in the 610 m level in Hedong Mine Area of Maoping Lead-Zinc Mine and a study on the pressure monitoring in conveying pipeline of paste filling slurry with composite aggregate is carried out.The results show that when the filling slurry is in laminar flow or transitional flow,the specific friction resistance calculation formula obtained by Buckingham formula has high accuracy.When the filling flow quantity is 60 m3/h and the filling slurry with cement-sand ratio of 1∶4 and mass concentration of 76%,the specific friction resistance of filling slurry is 5392 Pa/m.When stowing gradient is less than 2,the full pipe rate of the borehole is less than 50%.In the backfilling engineering practice,the full pipe rate can be improved by optimizing pipeline layout to increase stowing gradient,increasing filling quantity and mass concentration of slurry,and reducing pipe diameter to increase specific frictional resistance and increasing local resistance loss.This study offers valuable references for parame

关 键 词：复合骨料 膏体 管道输送 压力监测 比摩阻 

分 类 号：TD853[矿业工程—金属矿开采]