【摘要】 为解决采空区垮落和瓦斯扩散问题,分别选用矿渣、粉煤灰和水泥作为充填材料的骨料、细料和胶结剂,采用响应面法（Response Surface Method,RSM）设计配比试验,以质量浓度、材料比例和矿渣粒径作为单因素影响因子,材料流动性、抗压强度和渗透率为响应目标值,分析料浆质量浓度、材料比例和矿渣粒径对充填材料流动性、抗压强度和渗透性能的影响规律,并建立非线性回归方程,优化多目标条件下的充填材料配比。研究结果表明:（1）粉煤灰的火山灰效应会影响充填材料的水化反应进程,随着粉煤灰比例增大,各龄期的抗压强度先增大后减小,各龄期的渗透率增大;（2）矿渣表面粗糙,密度变化较大,在养护后期,随着矿渣粒径增大,材料抗压强度先增大后减小,材料渗透率减小;（3）充填材料的最佳材料配比为水泥∶粉煤灰∶矿渣=1∶3∶5,其中料浆质量浓度为80%,矿渣粒径为5～10mm;（4）该配比条件下的充填材料浆体流动度为20.5 cm,14 d渗透率为0.021×10^-14 m2,14 d抗压强度为22.2 MPa。研究成果为采空区减沉与瓦斯封存协同治理提供了基础参数和理论依据。更多还原

【Abstract】 In order to solve the problems of caving and gas diffusion in goaf,slag,fly ash and cement were selected as the aggregate,fine material and cementing agent of filling materials respectively. Response Surface Method（RSM） was adopted to design the matching test,and mass concentration,material proportion and slag particle size were taken as the single influencing factors. Material fluidity,compressive strength and permeability are the response target values. The effects of slurry mass concentration,material proportion and slag particle size on the fluidity,compressive strength and permeability of filling materials are analyzed,and a nonlinear regression equation is established to optimize the ratio of filling materials under multi-objective conditions. The study results indicate that:（1） The volcanic ash effect of fly ash can affect the hydration process of filling materials. As the proportion of fly ash increases,the compressive strength of each age group first increases and then decreases,and the permeability of each age group increases.（2） The surface of slag is rough and the density changes greatly. In the later stage of maintenance,as the particle size of slag increases,the compressive strength of the material first increases and then decreases,and the permeability of the material decreases.（3） The optimal material ratio for filling materials is cement ∶ fly ash ∶ slag=1 ∶3 ∶5,with a slurry mass concentration of 80% and a slag particle size of 5～10 mm.（4） The flowability of the filling material under this ratio is 20. 5 cm,and the permeability after 14 days is 0. 021×10^-14 m2,with a compressive strength of 22. 2 MPa after 14 days. The study results provide basic parameters and theoretical basis for the collaborative management of subsidence reduction and gas storage in goaf.更多还原