超细尾矿充灌管袋真空抽滤脱水试验与效率分析  

Vacuum filtration dewatering tests and efficiency analysis of geotextile tubes filled with ultra-fine tailings

作　　者：万俐 唐志勇 任天成 WAN Li;TANG Zhiyong;REN Tiancheng(Jiangxi Expressway Investment Group Co.,Ltd.Project Construction Management Company,Nanchang Jiangxi,330036,China;Jiangxi Transportation Engineering Group Co.,Ltd.Haitong Company,Nanchang Jiangxi,330038,China;Jiangxi Transportation Institute Co.,Ltd.Nanchang Jiangxi,330200,China)

机构地区：[1]江西省交通投资集团有限责任公司项目建设管理公司,江西南昌330036 [2]江西省交通工程集团有限公司海通公司,江西南昌330038 [3]江西省交通运输科学研究院有限公司,江西南昌330200

出　　处：《江西水利科技》2023年第6期454-459,共6页Jiangxi Hydraulic Science & Technology

摘　　要：针对超细尾矿充灌管袋难以脱水固结的技术问题,文章介绍了基于土工管袋的真空抽滤脱水试验方法,并开展了管袋真空抽滤物理模型试验,采用充灌、脱水与过滤效率共三个关键指标对管袋技术应用成效进行了分析评价。结果表明:充灌浓度对管袋充灌、脱水与过滤效率的影响明显高于真空压强;充灌与过滤效率随充灌浓度增加而提高,脱水效率则显著降低,适当降低充灌浓度可有效提高管袋施工效率;充灌浓度介于40%~60%之间时,充灌、脱水与过滤效率均随真空压强的增加而降低,适当降低真空压强可在一定程度上改善管袋脱水效率。试验结果可为土工管袋脱水工程提供理论与技术参考。Aimed at the technical problem that the ultra-fine tailings filling geotextile tube is difficult to dehydrate and consolidate,a vacuum filtration dewatering test method for geotextile tube was introduced,and physical model tests of the vacuum filtration and drainage promotion of the geotextile tube was carried out.Three key indicators of filling,dewatering and filtration efficiency were proposed and the effect of tube bag technology application was evaluated.The test results show that the effect of filling concentration on geotextile bag filling,dewatering and filtration efficiency is significantly higher than that of vacuum pressure;filling and filtration efficiency increases with the growth of filling concentration,while dewatering efficiency significantly reduces.Appropriate reduction of filling concentration can effectively improve the efficiency of geotextile tube construction;when the filling concentration is between 40%and 60%,the filling,dewatering and filtration efficiency will decrease with the increase of vacuum pressure.Appropriately reducing the vacuum pressure can improve the efficiency of geotextile tube dewatering to a certain extent.The results can provide theoretical and technical reference for the geotextile tube dehydration projects.

关 键 词：超细尾矿 土工管袋 真空抽滤 脱水固结 效率分析 

分 类 号：TD926[矿业工程—选矿]