粗骨料膏体抗离析性能评价模型与实验研究  

Evaluation model and experimental study for segregation resistance of paste with coarse aggregate

作　　者：王建栋[1,2] 吴爱祥[1,2] 王贻明[1,2] 王洪江[1,2] 彭乃兵[1] WANG Jiandong WU Aixiang WANG Yiming WANG Hongjiang PENG Naibing(Key Laboratory of Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《中国矿业大学学报》2016年第5期866-872,共7页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51374034;51304011;51374035);国家"十二五"科技支撑计划项目(2012BAB08B02)

摘　　要：通过建立骨料在料浆中的力学模型,确定粗骨料充填料浆具备良好抗离析性能的条件式M.运用三因素三水平正交实验研究料浆饱和率为101.5%～105.3%时M值和离析率的取值范围：以M=6作为料浆屈服应力在（200±25）Pa时的判定临界值,可得相同条件下满足饱和率要求的料浆M值范围为2.3～4.2,从而得到适合工程应用、具备较好抗离析性能的料浆离析率为11.6%～17.8%.采用某矿固体物料按照现场参数充填料浆,对实验结果进行实例验证.结果表明：实例M值和离析率范围与理论范围吻合良好.离析率预测值与测量值相比,误差分别为4.24%,1.09%,0.67%.Based on a mechanical model for studying the coarse aggregate in filling slurry, the segregation resistance formula M of coarse aggregate filling slurry was received. The three-factor and three-level orthogonal design scheme was used to study the range of M value and segregation rate at the saturation ratio of 101.5% to 105.3%. The M value of 6 is defined as a criti- cal index at the yield stress of （200±25） Pa. Under the same conditions, M value in the range of 2.3 to 4.2 which meets the requirements of saturation can be obtained. Based on the results, segregation rate of slurry for industrial application and with good segregation resistance can be derived to range from 11.6% to 17.8%. Solid materials from a certain mine, prepared in accordance within-situfilling slurry parameters, were used to testify the experiment results. The results show that the range of actual M value and segregation rate are in good agreement with theoretical ranges. Compared with the measured values, predicted segregation rate has a discrepancy of 4.24%, 1.09% and 0.67%, respectively.

关 键 词：膏体 抗离析性能 粗骨料 屈服应力 离析率 

分 类 号：TD853[矿业工程—金属矿开采]