块石尾砂胶结充填体割线模量特征分析

为了研究块石尾砂配比对块石尾砂胶结充填体割线模量的影响，制备了不同块石尾砂配比的充填体试件，分析试验中块石尾砂胶结充填体割线模量的特征。结果表明：随着块石尾砂配比的提高，充填体割线模量呈现出先增大后减小的趋势，当块石尾砂配比为7∶3时，块石尾砂胶结充填体的割线模量达到最高。之后，随着块石尾砂配比的继续增加，充填体的割线模量开始减小。当块石尾砂配比小于7∶3时，分析得出割线模量增强因子与块石尾砂配比之间呈现指数型函数的关系。

Characteristics of Secant Modulus of the Block stone Tailings Cemented Backfill

In order to study the influence of the ratio of block tailings on the secant modulus of the block stone tailings cemented backfill,the specimens with different ratio of block stone tailings were prepared,and the characteristics of secant modulus of the block stone tailings cemented backfill were analyzed.The results show that the secant modulus of filling body increases firstly and then decreases with the increase of the ratio of block tailings.When the ratio of block tailings is 7∶3,the secant modulus of the block stone tailings cemented backfill reaches the highest.Afterwards,the secant modulus of filling body begins to decrease with the increase of the ratio of block tailings.When the ratio of block tailings is less than 7∶3,the relationship between secant modulus enhancement factor and the ratio of block tailings shows an exponential function.