龙桥铁矿采空区顶板岩层移动及冒落规律研究  

Study on the Movement and Caving Laws of Roof strata of Mined-out area in Longqiao Iron Mine

作　　者：江文武[1] 丁铭 张耀平[1] 卢志刚[1] 

机构地区：[1]江西理工大学应用科学学院,江西赣州市341000 [2]龙桥矿业有限公司,安徽庐江县510640

出　　处：《矿业研究与开发》2011年第3期17-19,39,共4页Mining Research and Development

摘　　要：采用FLAC-3D对龙桥铁矿采空区顶板岩层移动及冒落规律进行了模拟研究,研究结果表明:整个采空区的顶板岩层移动比较平缓、稳定,矿区整体失稳的概率小;回采完-342.5分段3_5线矿体后,采空区顶板围岩的垂直下降变形及应力出现较为明显的变化,此时顶板围岩出现冒落迹象;0-2线附近矿体对采空区顶板岩层移动及冒落规律有着重要的影响,随着后续矿体的开采,促使0-2线采空区的倾向跨度逐步增加,最终可导致采空区顶板岩层移动冒落。Simulation study on the movement and caving laws of the roof strata of mined-out area in Longqiao iron mine was carried out by FLAC-3D.The results showed that： the roof strata of the whole mined-out area moved relatively flat,stable,the overall instability of the mining area is an event of small probability;After the ore stoping of-342.5 sublevel near the 3_5 line finished,more significant changes occurred in vertical deformation and stress of the roof rock of the mined-out area,here,the signs of roof rock caving appeared;the mined-out areas near the 0-2 line has have a significant impact on the movement and caving laws of the roof strata,as the follow-up exploitation of ore body,the span of the mined-out areas will increase gradually,which ultimately result in the movement and caving of the roof strata of mined-out areas.

关 键 词：采空区 岩层移动 FLAC 顶板冒落 

分 类 号：TD327.2[矿业工程—矿井建设]