全尾砂膏体充填临界质量分数  

Threshold mass fraction of unclassified-tailings paste for backfill mining

作　　者：翟永刚[1] 吴爱祥[1] 王洪江[1] 陈琴瑞[1] 肖云涛[1] 寿震宇[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中钢集团马鞍山矿山研究院有限公司,马鞍山243004

出　　处：《北京科技大学学报》2011年第7期795-799,共5页Journal of University of Science and Technology Beijing

基　　金："十一五"国家科技支撑计划资助项目(No.2006BAB02A01)

摘　　要：以全尾砂充填膏体为研究对象,利用四叶桨式旋转式流变仪测试质量分数为69%～81%的充填料浆的流变特征及其参数,采用赫谢尔-布尔克莱模型回归得出料浆在剪切速率为0～120 s-1条件下的流变模型.结果表明:质量分数为69%～81%的料浆流变模型为屈服伪塑性体,质量分数为81%的料浆为宾汉塑性体;流变性能指数n与料浆的质量分数呈线性关系,随质量分数的增大而增大.膏体的临界质量分数为80.91%.The rheological characteristics and parameters of the filling slurries of 69% to 81% in mass fraction were tested with a four-bladed vane rotary rheometer taking unclassified-tailings filling paste as a research object.Based on the Herschel-Bulkley model,the rheological models were derived from regression at shear rates of 0 to 120s-1.It is shown that the rheological models exhibit yield-pseudoplastic for the filling slurries of 69% to 81% in mass fraction and Bingham plastic for the filling slurries of 81% in mass fraction.There is a good linear relationship between the flow behaviour index n and the mass fraction of filling slurries,and the flow behaviour index n increases with the mass fraction of filling slurries increasing.Finally,the threshold mass fraction of the paste is 80.91%.

关 键 词：充填采矿法 尾砂 料浆 流变学 

分 类 号：TD853.34[矿业工程—金属矿开采]