磷石膏膏体充填体力学特性研究  

Study on the Mechanical Properties of the Phosphogypsum Paste Filling Material

作　　者：赵国彦[1] 侯俊[1,2] 张小瑞[2] 李地元[1] 王涛[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]长春黄金研究院,吉林长春130012

出　　处：《黄金科学技术》2016年第5期7-12,共6页Gold Science and Technology

基　　金：国家自然科学基金项目"采场卸荷岩体的能量演化及损伤特性研究"(编号51374244)资助

摘　　要：以贵州开磷集团膏体充填项目为工程背景,磷石膏膏体充填体为主要研究对象,采用室内试验与现场模拟试验相结合,进行磷石膏充填膏体力学特性试验研究。通过测定不同黄磷渣掺量、添加剂掺量和膏体质量浓度下膏体不同龄期(7 d、14 d和28 d)的立方体试块的抗压强度和抗拉强度,分析得到:试块抗压强度随着黄磷渣含量的增加而增加;膏体充填体强度随着膏体质量浓度增大而增强。结合FLAC^(3D)建立磷石膏膏体充填体力学本构模型并对试验进行数值验证,结果表明膏体充填体变形特性符合摩尔—库仑数值模型。Taking the paste filling project of Guizhou Kailin Group as the project backgrourd,the phosphogypsum paste backfill as the main object,the strength characteristic test of Phosphorus gypsum filling paste was conducted by using laboratory testing and theoretical analysis.The study determinated the compressive strength and tensile strength of the test cube in different dosage of phosphorus slag,additives and paste concentration in different ages（7,14,28 d）,analysis shows that the obtained specimen compressive strength increases with phosphorus slag content increases;paste filling body strength increases with the concentration and enhance the quality of the paste.The constitutive model of the phosphogypsum paste-backfill was established by using FLAC3 D,and the numerical verification show that the paste filling deformation characteristics was in line with Moore-Coulomb numerical model.

关 键 词：磷石膏 膏体充填 力学特性 FLAC3D 力学本构模型 数值模拟 

分 类 号：TD871.3[矿业工程—非金属矿开采]