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该文采用Malvern Mastersizer 2000激光粒度仪，分别对充填胶和PO 42.5级水泥的粒径进行测试，考察充填胶颗粒和PO 42.5级水泥的粒径分布情况.采用扫描电镜(SEM),考察充填胶材料的表面微观形貌特征.采用ZSX Primus III+X射线荧光光谱仪(XRF),测量充填胶材料的化学成分和含量.采用充填胶和PO 42.5级水泥制备混合充填胶凝材料，考察不同掺量充填胶与PO 42.5级水泥配合比条件下混合充填胶凝材料的稠度特征.结果表明，充填胶材料的粒径分布主要集中在几微米到几十微米的范围内，颗粒均匀度较好，充填胶颗粒材料的比表面积较大，具有较高的表面活性和吸附能力；充填胶材料的主要氧化物成分为CaO、SiO2、Al_2O3、MgO和SO3;混合充填胶凝材料稠度随充填胶添加量的增大呈现出先增后减的趋势，综合考虑满足采空区所需充填体强度与经济成本要求，建议采用充填胶与PO 42.5级水泥配合比为5∶5的混合充填胶凝材料，对矿山大规模采空区进行充填治理，以消除因地表塌陷对矿区周边生态环境产生的不利影响，并达到降低治理成本的目的.
Abstract：The particle sizes of filling adhesive and PO 42.5 grade cement are tested by using a Malvern Mastersizer 2000 laser particle size analyzer, and the particle size distribution of filling cementitious particles and PO 42.5 grade cement are analyzed. Then, the surface microstructure characteristics of the filling cementitious material are investigated by using scanning electron microscopy(SEM), and the chemical composition and content in the filling cementitious material are measured by using Primus III+ X-ray fluorescence spectrometer(XRF). Finally, the mixed filling cementitious materials manufactured by filling adhesive and PO 42.5 grade cement with different mix proportion designs are prepared(SEM), and the viscosity characteristics of the mixed filling cementitious material at various proportions of filling adhesive and PO 42.5 grade cement are studied. The results indicate that the particle size distribution of the filling cementitious material is mainly concentrated in the range of a few micrometers to tens of micrometers, with good particle uniformity. The filling cementitious particle material has a large specific surface area and high surface activity and adsorption capacity. The main oxide components of the filling cementitious material are CaO, SiO2, Al_2O3, MgO, and SO3.The consistency of mixed filling cementitious material firstly increases and then is reversal with increasing filling gel. Considering the requirements of filling body strength and economic cost required by the goaf, it is recommended to use the mixed filling gel material with the mix ratio of filling adhesive and PO 42.5 cement of 5:5 to fill the large-scale mined out area of the mine, so as to eliminate the adverse impact of the potential hazards of surface subsidence on the surrounding ecological environment of the mining area, and achieve the purpose of reducing governing costs.
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基本信息:
DOI：10.13715/j.issn.2096-644X.20250221.0002
中图分类号:TD325.3
引用信息:
[1]杨子安,黄宸缘,周子林,等.采空区充填治理用混合充填胶凝材料稠度特征试验研究[J].湘潭大学学报(自然科学版),2025,47(06):1-10.DOI:10.13715/j.issn.2096-644X.20250221.0002.
基金信息:
湖南省自然科学基金(2023JJ50041); 湖南省大学生创新训练计划项目(S202410530209); 湖南省学位与研究生教学改革研究项目(2024LXBZZ046); 湘潭大学博士科研启动项目(22QDZ28,22QDZ28-2)
2025-03-18
2025-03-18
2025-03-18