It is of great significance to study the effect of solid contents (SC), binder-to-tailings (b/t) ratio, types and dosage of fly ash (FA) on the viscosity (V) and uniaxial compressive strength (UCS) of backfill. It can improve filling efficiency and reduce filling costs to understand the relationship between SC, b/t ratio, FA dosage and viscosity, and UCS of backfill. Consequently, this paper carried out uniaxial compression tests and rheological tests on five different types of backfill specimens. Experimental results indicate that, with the increase of SC, the viscosity and UCS of all backfill samples increases as a power function. With the decrease of b/t ratio, the viscosity and UCS of all backfill samples decreases as an exponential function. The coupling effect of SC and b/t ratio has a great influence on the viscosity and UCS of backfill samples. The relationship between SC, b/t ratio and viscosity, and UCS is a quadratic polynomial function. The order of the viscosity of the backfill slurry is: pure tailings < backfill slurry mixed with Ordinary Portland Cement (OPC) < backfill slurry mixed with FA1 < backfill slurry mixed with FA2. The higher the FA dosage, the greater the viscosity. The order of the UCS of backfill is: backfill with OPC > backfill with FA1 > backfill with FA2. The higher the FA dosage, the smaller the UCS. The UCS of all backfill samples increased with the increase of curing time (CT). The relations between the viscosity and UCS of backfill present the positively linear functions. It is feasible to use viscosity to predict the UCS of backfill, and the error between the UCS predicted value and the test value is mostly controlled within 10%. Ultimately, the findings of the experimental work will provide a scientific reference for the mine to design the strength of the backfill.

中文翻译：

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粉煤灰水泥尾矿回填的黏度和强度特性及其强度预测

研究固含量（SC），胶料比（b / t），粉煤灰（FA）的种类和用量对粘度（V）的影响具有重要意义。）和回填的单轴抗压强度（UCS）。了解SC，b / t比，FA剂量和粘度以及回填的UCS之间的关系可以提高填充效率并降低填充成本。因此，本文对五种不同类型的回填样品进行了单轴压缩试验和流变试验。实验结果表明，随着SC的增加，所有回填样品的粘度和UCS随幂函数增加。随着b / t比的降低，所有回填样品的粘度和UCS均呈指数函数下降。SC和b / t比的耦合效应对回填样品的粘度和UCS有很大影响。SC，b / t比和粘度以及UCS之间的关系是二次多项式函数。回填浆液的粘度顺序为：纯尾矿<与普通硅酸盐水泥（OPC）混合的回填浆料<与FA1混合的回填浆料<与FA2混合的回填浆料 FA剂量越高，粘度越大。回填的UCS的顺序为：使用OPC进行回填>使用FA1进行回填>使用FA2进行回填。FA剂量越高，UCS越小。所有回填样品的UCS随着固化时间（CT）的增加而增加。回填的粘度和UCS之间的关系呈现正线性函数。用粘度来预测回填的UCS是可行的，并且UCS预测值和测试值之间的误差大部分控制在10％以内。最终，实验工作的结果将为矿山设计回填土的强度提供科学依据。与普通硅酸盐水泥（OPC）混合的回填浆料<与FA1混合的回填浆料<与FA2混合的回填浆料 FA剂量越高，粘度越大。回填的UCS的顺序为：使用OPC进行回填>使用FA1进行回填>使用FA2进行回填。FA剂量越高，UCS越小。所有回填样品的UCS随着固化时间（CT）的增加而增加。回填的粘度和UCS之间的关系呈现正线性函数。使用粘度来预测回填的UCS是可行的，并且UCS预测值和测试值之间的误差大部分控制在10％以内。最终，实验工作的结果将为矿山设计回填土的强度提供科学依据。与普通硅酸盐水泥（OPC）混合的回填浆料<与FA1混合的回填浆料<与FA2混合的回填浆料 FA剂量越高，粘度越大。回填的UCS的顺序为：使用OPC进行回填>使用FA1进行回填>使用FA2进行回填。FA剂量越高，UCS越小。所有回填样品的UCS随着固化时间（CT）的增加而增加。回填的粘度和UCS之间的关系呈现正线性函数。用粘度来预测回填的UCS是可行的，并且UCS预测值和测试值之间的误差大部分控制在10％以内。最终，实验工作的结果将为矿山设计回填土的强度提供科学依据。