煤矿安全2024，Vol.55Issue(11)：166-175,10.DOI:10.13347/j.cnki.mkaq.20231246
矸石混凝土巷旁充填体材料及合理宽度研究
Research on roadside filling body materials and reasonable width of gangue concrete
摘要
Abstract
In order to reduce the cost of roadside filling and ensure the stability of the retained roadway system,the 150202 fully mechanized mining face of Shenlei Coal Mine is taken as the background,and the roadside filling body is made of coal gangue and fly ash as the base material,through orthogonal experiments,theoretical analysis,numerical simulation,on-site measurement and other research methods,the optimal ratio of filling materials and the laws of yield stress and deformation of roadway surrounding rock with different filling widths are studied.The results show that the optimal ratio of gangue filling body is water cement ratio 1∶1.85,fly ash replacement cement ratio of 20%,fine coarse aggregate ratio of 35∶65,and sodium silicate content of 6%;the lar-ger the width of the roadside filling body next to the gob-side entry retaining,the lower the deformation of the surrounding rock and the vertical stress of the coal wall;by comprehensively comparing the stress and displacement of surrounding rock under different widths,it is concluded that the reasonable width of the roadside filling body next to gob-side entry retaining is 1.2 m.关键词
沿空留巷/矸石混凝土/巷旁充填体/充填材料/合理宽度/变形规律Key words
gob-side entry retaining/gangue concrete/roadside filling body/filling materials/reasonable width/deformation law分类
矿业与冶金引用本文复制引用
杨庚群,王军,孙永康,陈现辉,李文璞,王涛..矸石混凝土巷旁充填体材料及合理宽度研究[J].煤矿安全,2024,55(11):166-175,10.基金项目
山西省基础研究计划资助项目(202203021212229) （202203021212229）
