尾砂胶结充填体抗拉强度试验及其影响因素研究  

Experimental study on tensile strength of cemented tailings backfill and influencing factors

作　　者：唐国星 郭利杰 刘光生 杨小聪 TANG Guoxing;GUO Lijie;LIU Guangsheng;YANG Xiaocong(Beijing General Research Institute of Mining&Metallurgy,Beijing 100160,China;National Center for International Joint Research on Green Metal Mining,Beijing 102628,China;BGRIMM Technology Group,Beijing 102628,China)

机构地区：[1]北京矿冶研究总院,北京100160 [2]金属矿绿色开采国家国际联合研究中心,北京102628 [3]矿冶科技集团有限公司,北京102628

出　　处：《中国矿业》2022年第4期124-131,共8页China Mining Magazine

基　　金：国家重点研发计划青年科学家项目资助(编号:2021YFC2900600)。

摘　　要：为科学获取尾砂胶结充填体抗拉强度参数,本文提出了一种适用于尾砂胶结充填体的直接拉伸试验方法,并设计制作了相应的充填体试验装置及养护模具。应用该方法开展了不同配比、龄期充填体的抗拉强度试验研究,通过单因素拟合分析得到抗拉强度与灰砂比、质量浓度、龄期的关系以及敏感性。尾砂胶结充填体抗拉强度与灰砂比、质量浓度和龄期分别呈线性函数、指数函数和对数函数关系。尾砂胶结充填体抗拉强度对灰砂比的变化最为敏感,对龄期的敏感性相对最低。本文的试验方法与研究试验结果可为形成标准化的矿山充填胶结充填体抗拉强度测定方法提供参考。In order to obtain the tensile strength of cemented tailings backfill scientifically, a direct tensile test suitable for cemented tailings backfill is proposed in this paper, and the corresponding test apparatus is developed, including a loading frame and a five-part split mold.The test is carried out to measure the tensile strength of backfill with different cement-sand ratio, slurry solid content and curing ages.Based on the test data, the relationship between tensile strength of cemented tailings backfill and the three factors is analyzed by single-factor analysis.The sensitivity of tensile strength to these three factors is also studied.The relationship between the tensile strength of cemented tailings backfill and cement-sand ratio, slurry solid content and curing ages can be expressed as linear function, exponential function and logarithmic function respectively.The sensitivity of tensile strength of cemented tailings backfill to the change in cement-sand ratio is highest, but it is the lowest to curing ages.The test method and study results in this paper can provide a reference for the formation of a standardized test method for determining tensile strength of cemented tailings backfill.

关 键 词：尾砂胶结充填 抗拉强度 试验方法 充填配比 敏感性 

分 类 号：TD853.34[矿业工程—金属矿开采]