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黄金科学技术 ›› 2018, Vol. 26 ›› Issue (3): 305-311.doi: 10.11872/j.issn.1005-2518.2018.03.305

• 采选技术与矿山管理 • 上一篇    下一篇

APAM对全尾砂胶结充填体早期强度影响研究

王新民,赵茂阳,荣帅,王浩,张云海   

  1. 中南大学资源与安全工程学院,湖南 长沙 410083
  • 收稿日期:2017-01-06 修回日期:2017-09-15 出版日期:2018-06-30 发布日期:2018-07-28
  • 作者简介:王新民(1957-),男,安徽安庆人,教授,从事采矿与充填技术研究工作。wxm1958@ 126.com
  • 基金资助:
    “十二五”国家科技支撑计划课题“多空区厚大矿体安全高效开采及工程化技术研究”(编号:2015BAB14B01)和中央高校研究生自主创新项目“超细全尾砂胶结充填体早期强度微观影响机理及超声特性研究”(编号:2017zzts580)联合资助

Influence of APAM on Early Age Strength of Cemented Backfill Based on Unclassified Tailings

WANG Xinmin,ZHAO Maoyang,RONG Shuai,WANG Hao,ZHANG Yunhai   

  1. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
  • Received:2017-01-06 Revised:2017-09-15 Online:2018-06-30 Published:2018-07-28

摘要: 为探究阴离子型聚丙烯酰胺(APAM)对全尾砂胶结充填体早期强度的影响,采用动态浓密实验装置向全尾砂浆中添加不同单耗和相对分子量的APAM,将所得底流制备成质量浓度为70%、72%、74%,灰砂比为1∶4和1∶8的胶结充填体试块并进行7d抗压强度测试,并借助扫描电镜(SEM)对充填体微观结构进行观察分析。结果表明:APAM对充填体早期强度具有一定的影响,当灰砂比越小、料浆质量浓度越高时,APAM相对分子量越大,对充填体强度影响越大,强度降低越显著;充填体强度随APAM单耗增加先增大后减小;SEM结果表明,APAM引入封闭气孔到充填体中,但适量的APAM能够促进水泥水化反应的进行,充填体内部水化产物黏结更紧密,使充填体早期强度增加;在实验范围内,APAM的最佳单耗为5 g/t。

关键词: 聚丙烯酰胺, 相对分子量, 单耗, 全尾砂胶结充填体, 早期强度, 水化, 扫描电镜, 微观结构

Abstract: In order to determine the influence of anionic polyacrylamide (APAM) on early strength of cemented backfill body of unclassified tailings,experiments on cemented backfill samples (concentration of 70%,72% and 74%,cement-sand ratio of 1∶4 and 1∶8,respectively) with different dosage and relative molecular weight of APAM were conducted by using the dynamic test apparatus of thickener.At the predetermined 7 d curing periods,the cemented backfill samples were subjected to the uniaxial compressive strength tests,and microstructure of backfill body was analyzed by using scanning electron microscope (SEM).The results show that,AMAP has certain influence on the early strength of the backfill body,when the cement-sand ratio is lower and the mass concentration is higher,the larger the molecular weight of APAM is,the more evident the decrease of uniaxial compressive strength of cemented backfill body will be.The strength of cemented backfill first increased and then decreased with increasing the unit consumption of APAM.SEM results show that APAM introduces more enclosed pores into cemented backfill body,however proper amount of APAM can promote the hydration reaction and increase the compactness of hydration products in backfill body,which leads to higher early strength of backfill body. In this experiment,the optimum unit consumption of APAM is 5 g/t.

Key words: APAM, relative molecular weight, unit consumption, unclassified tailings cemented backfill, early strength, hydration, SEM, microstructure

中图分类号: 

  • TD853
[1] 周爱民,古德生.基于工业生态学的矿山充填模式[J].中南大学学报(自然科学版),2004,35(3):468-472.<br />
Zhou Aimin,Gu Desheng.Mine-filling model based on industrial ecology[J].Journal of Central South University of Technology(Sciences and Technology),2004,35(3):468-472.<br />
[2] Khaldoun A,Ouadif L,Baba K,et al.Valorization of mining waste and tailings through paste backfilling solution,imiter operation,Morocco[J].International Journal of Mining Science and Technology,2016,26(3):511-516.<br />
[3] Sivakugan N,Rankine R M,Rankine K J,et al. Geotechnical considerations in mine backfilling in Australia[J]. Journal of Cleaner Production,2006,14(12/13):1168-1175.<br />
[4] Wang X M,Zhao J W,Xue J H,et al.Features of pipe transportation of paste-like backfilling in deep mine[J].Journal of Central South University of Technology,2011,18(5):1413-1417.<br />
[5] 吴爱祥,焦华喆,王洪江,等.深锥浓密机搅拌刮泥耙扭矩力学模型[J].中南大学学报(自然科学版),2012,43(4):1469-1474.<br />
Wu Aixiang,Jiao Huajie,Wang Hongjiang,et al.Mechanical model of scraper rake torque in deep-cone thickener[J].Journal of Central South University (Science and Technology),2012,43(4):1469-1474.<br />
[6] Usher S P,Scales P J.Steady state thickener modelling from the compressive yield stress and hindered settling function[J].Chemical Engineering Journal,2005,111(2/3):253-261.<br />
[7] Wang X M,Zhao B,Zhang Q L,et al.Cemented backfilling technology with unclassified tailings based on vertical sand silo[J].Journal of Central South University of Technology,2008,15(6):801-807.<br />
[8] 王勇,吴爱祥,王洪江,等. 絮凝剂用量对尾矿浓密的影响机理[J].北京科技大学学报,2013,35(11):1419-1423.<br />
Wang Yong,Wu Aixiang,Wang Hongjiang,et al.The mechanism of flocculation on sedimentation[J].Journal of University of Science and Technology Beijing,2013,35(11):1419-1423.<br />
[9] 何哲祥.絮凝剂对胶结充填体强度的影响[J].长沙矿山研究院季刊,1990,10(1):48-53.<br />
He Zhexiang.Flocculant’s influence on the strength of cementing filling body[J].Quarterly of Changsha Mining Research Institute,1990,10(1):48-53.<br />
[10] 史秀志,胡海燕,杜向红,等.立式砂仓尾砂浆液絮凝沉降试验研究[J].矿冶工程,2010,30(3):1-3.<br />
Shi Xiuzhi,Hu Haiyan,Du Xianghong,et al.Experimental study on flocculating sedimentation of tailings slurry in a vertical sand tank[J].Mining and Metallurgical Engineering,2010,30(3):1-3.<br />
[11] Selomuya C,Jia X,Williams R A.Direct Prediction of structure and permeability of flocculated structures and sediments using 3D tomographic imaging[J].Chemical Engineering Research and Design,2005,83(7):844-852.<br />
[12] Eswaraiah C,Biswal S K,Mishra B K.Settling characteristics of ultrafine iron ore slimes[J].Internation Journal of Minerals Metallurgy and Materials,2012,19(2):95-99.<br />
[13] 吴文.添加絮凝药剂的尾矿砂浆充填材料的单轴抗压强度试验研究[J].岩土力学,2010,31(11):3367-3372.<br />
Wu Wen.Investigation on uniaxial compressive strength of flocculated slurry backfill materials for minefill applications[J].Rock and Soil Mechanics,2010,31(11):3367-3372.<br />
[14] Wang Y,Gao B,Yue Q,et al.Effect of viscosity,basicity and organic content of composite flocculant on the decolorization performance and mechanism for reactive dyeing wastewater[J].Journal of Environmental Sciences,2011,23(10):1626-1633.<br />
[15] 刘志祥,李夕兵.尾砂分形级配与胶结强度的知识库研究[J].岩石力学与工程学报,2005,24(10):1789-1793.<br />
Liu Zhixiang,Li Xibing. Study on fractal gradation of tailings and the knowledge bank of cementation strength[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(10):1789-1793.<br />
[16] 张玉佩,申向东.聚丙烯酰胺对水泥土强度影响的试验研究[J].硅酸盐通报,2012,31(6):1636-1640.<br />
Zhang Yupei,Shen Xiangdong.Experiment study of AP-AM on cement toil strength[J].Bulletin of the Chinese Ceramic Society,2012,31(6):1636-1640.<br />
[17] Patrick T S,Sotiris E P.Shear-induced flocculation:The Eveolution of floc structure and the shape of the size distribution at steady state[J].Water Resource,1996,30(5):1049-1056.<br />
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