矿用煤矸石胶结充填体配比的影响因素分析
Analysis of Influencing Factors of Coal Gangue Cementation Filling Ratio for Mining

煤矸石胶结充填可有效控制煤矿开采造成的地表沉陷，减少环境破坏。为研究固体质量浓度、水泥掺量、粉煤灰掺量对充填体物理性质的影响规律，优化充填材料配比，设计9组配比试验，为工程上获得合理充填材料配比提供科学方法，研究表明固体质量浓度低于80时，与充填体强度为正相关；增加水泥掺量可以提高充填体的流动性指标与抗压强度，增加粉煤灰掺量可以优化充填体流动性但也会影响强度。
Coal gangue cementation filling can effectively control the surface subsidence caused by coal mining and reduce environmental damage. In order to study the influence of solid mass concentration, cement content and fly ash content on the physical properties of the filling body, optimize the ratio of filling materials, and design 9 groups of ratio tests to provide scientific methods for obtaining a reasonable ratio of filling materials in engineering, the results show that when the solid mass con-centration is lower than 80, it is positively correlated with the strength of the filling body. Increasing the cement content can improve the fluidity index and compressive strength of the filling body, and increasing the fly ash content can optimize the fluidity of the filling body, but it will also affect the strength.