Through exploring changes of rheological properties and strength properties of unclassified tailing paste in Bai-ling copper-zinc mine under the condition of different paste concentrations and cement sand ratio,the influence of paste con-centration and cement sand ratio on the properties of paste were determined. In addition,the primary and secondary relationship between the two factors affecting the paste properties was obtained by range analysis,guiding to determine the reasonable range of the paste ratio. The regression equations between the two factors and the paste performance parameters of were established. The test results show that when the paste concentration is 75% ~77%,the cement sand ratio is 0. 04~0. 12,the effect of paste concentration on the rheological properties of paste is greater than that of cement sand ratio,but cement sand ratio is the main factors affecting the strength of paste. According to the actual requirements in Bailing copper-zinc mine and the indoor test re-sults,combining the regression relationship between the concentration as well as cement sand ratio and paste parameters,the optimum paste concentration is recommend to be 77% and the cement sand ratio 0. 05 for this mine,which can meet the liquid-ity requirements and the strength requirements for Bailing copper-zinc mine,providing the safe and reliable technical support for the exploitation of this shallow buried ore body below the highway.%通过探究在不同膏体浓度和灰砂比条件下,白岭铜锌矿全尾砂膏体流变特性和强度性能的变化,确定膏体浓度和灰砂比对于膏体性能的影响.通过极差分析得出二者对于膏体性能影响的主次关系,指导确定膏体配比的合理范围,并建立了二者与膏体性能参量之间的回归方程.试验结果表明:在膏体浓度为75%~77%、灰砂比为0.04~0.12的条件下,膏体浓度对于膏体流变性能的影响大于灰砂比,而灰砂比是膏体强度的主要影响因素.根据白岭铜锌矿的实际要求及室内试验结果,结合浓度和灰砂比与膏体性能参量的回归关系,最终为白岭铜锌矿推荐出既能满足流动性要求又能满足强度要求的最佳膏体浓度为77%,灰砂比为0.05,为该高速公路下方浅埋矿体的开采提供安全可靠的技术保障.
展开▼
