基于补连塔煤矿煤矸石破碎效果的胶结充填材料研究  

Research on Cemented Filling Materials Based on the Crushing Eff ect of Coal Gangue in Bulianta Coal Mine

作　　者：罗文[1] 杨增福 朱阳亚 黄振华 Luo Wen;Yang Zengfu;Zhu Yangya;Huang Zhenhua(Shendong Coal Branch of China Shenhua Energy Company Limited,Shaanxi,719000;Feny Co.,Ltd.,Hu'nan,410625)

机构地区：[1]中国神华能源股份有限公司神东煤炭分公司,陕西719000 [2]飞翼股份有限公司,湖南410625

出　　处：《当代化工研究》2024年第23期176-178,共3页Modern Chemical Research

摘　　要：为提高煤矸石固废利用率,推进大宗固废源头减量、资源化利用和无害化处置,探索将补连塔煤矿煤矸石用作胶凝材料制备充填材料。通过三种破碎方式处理煤矸石,并进行破碎筛分、配比优化及力学性能分析,利用XRD、XRF等手段评估。结果显示,破碎后煤矸石粒径分布合理,粒径+4.75mm占13.6%,可获得良好工作性能的充填体料浆。不同破碎效果对充填体抗压强度有显著影响,其中80mm以上煤矸石双级破碎后强度最高,7d达1.8MPa,28d近4MPa。且质量分数升高、煤矸石掺量降低时,泌水率减小。In order to improve the utilization rate of coal gangue solid waste and promote the source reduction,resource utilization and harmless disposal of bulk solid waste,the use of coal gangue in Bulianta Coal Mine is explored as a cementitious material to prepare filling materials.Coal gangue was processed by three crushing methods,crushed and screened,ratio optimization and mechanical properties analysis,and evaluated by XRD,XRF and other means.The results showed that the particle size distribution of coal gangue after crushing was reasonable,and the particle size was+4.75 mm,accounting for 13.6%,and the filling slurry with good working performance could be obtained.Different crushing effects have a significant effect on the compressive strength of the backfill,among which the strength of coal gangue above 80 mm after two-stage crushing is the highest,reaching 1.8 MPa in 7 d and nearly 4 MPa in 28 d.And when the concentration increases and the gangue content decreases,the water secretion rate decreases.

关 键 词：煤矸石 破碎 颗粒级配 单轴抗压强度 

分 类 号：TD823.7[矿业工程—煤矿开采]