大体积高冒区假顶封闭与无机充填技术研究  

Research on the False Roof Sealing and Inorganic Filling Technology of Large Volume and Top Coal Caving Region

作　　者：马雁飞 Ma Yanfei(Jinneng Holding Coal Industry Group Zhaozhuang Coal Industry Co.,Ltd.,Shanxi Changzhi 046600)

机构地区：[1]晋能控股煤业集团赵庄煤业有限责任公司,山西长治046600

出　　处：《山东煤炭科技》2023年第6期47-49,共3页Shandong Coal Science and Technology

摘　　要：针对大体积高冒区存在的瓦斯积聚和顶板冒落隐患,采用钢丝绳悬吊工字钢方式构建人工假顶对高冒区底部进行封闭,选择无机发泡材料作为充填材料,6min失去流动性,1~2h固化,膨胀倍数5倍,密度0.4 g/cm^(3),3 d强度约2 MPa。效果考察表明,充填体与顶板紧密贴合,高冒区完全充满,充填体成型强度达到设计要求,5个月观测期内顶板下沉量为零。Aiming at the hidden dangers of gas accumulation and roof caving in large volume and top coal caving regions,an artificial false roof is constructed by hanging I-beams with steel wire ropes to seal the bottom of the top coal caving region.Inorganic foam material is selected as the filling material,losing fluidity in 6 minutes,curing in 1-2 hours,expansion factor 5 times,density 0.4 g/cm^(3),and strength of about 2 MPa after 3 days.The effectiveness inspection shows that the filling body is tightly attached to the roof,the top coal caving region is completely filled,and the forming strength of the filling body meets the design requirements.The roof subsidence amount during the 5-month observation period is zero.

关 键 词：大体积 高冒区 假顶 充填 

分 类 号：TD327.2[矿业工程—矿井建设]