【摘要】 为降低充填材料成本，在保证充填体单轴抗压强度和料浆流动性的前提下，对添加外加剂的充填料浆配合比优化进行了研究，并对试验结果进行方差分析。结果表明：在扩散度为(91±2) cm的前提下，灰砂比为1∶4时，通过添加外加剂，充填料浆的质量浓度可从78.0%提高至83.6%;相同水泥掺量条件下，充填体单轴抗压强度随着料浆质量浓度的提高而增大；充填体的单轴抗压强度随着水泥掺量的增大而增大，在水泥掺量不小于15.5%时，质量浓度82.4%及以上的料浆配合比下的充填体单轴抗压强度均超过现用78.0%的充填体单轴抗压强度；在保证经济性的前提下，推荐使用质量浓度为82.4%、水泥掺量为15.5%、外加剂掺量为300 mL/t的料浆配合比。更多还原

【Abstract】 In order to reduce the cost of filling materials, while ensuring the uniaxial compressive strength of the filling body and the fluidity of the slurry, the optimization of the filling slurry proportion with additives was studied, and the variance analysis of the test results was carried out. The results show that the mass concentration of filling slurry can be increased from 78.0% to 83.6% by adding additives when the cement-sand ratio is 1∶4 and the diffusivity is(91±2) cm. Under the condition of the same cement content, the uniaxial compressive strength of the filling body increases with the increase of the mass concentration of the slurry. The uniaxial compressive strength of the filling body increases with the increase of cement content. When the cement content is not less than 15.5%, the uniaxial compressive strength of the filling body under the mass concentration larger than 82.4% exceeds that under the existing mass concentration of 78.0%. On the premise of ensuring economy, it is recommended to use a slurry proportion with a mass concentration of 82.4%, a cement content of 15.5%, and an admixture content of 300 mL/t.更多还原