崩落围岩处理采空区对尾矿库的影响研究

Study of the Influence of Using Caving Rock to Deal with Goaf to Tailings

某铁矿地下采空区的地表为尾矿库的一部分,为确保尾矿库稳定,采用崩落充填法处理后运用"三带"理论、岩石移动带理论及数值模拟对采空区进行研究。结果表明,崩落处理采空区后,地表水平位移和竖直位移均处在标准范围内,地表沉降裂隙带距尾矿库最小距离为127 m,采空区处理后能够保证地表尾矿库稳定。但随着该矿深部矿体的进一步开采,应加强对地表裂隙带范围的监控,以保证尾矿库的安全。

Part of the tailings is existed at the surface of a underground iron mine goaf,in order to ensure the tailings stability,the caving filling method is adopted to deal with the goaf,the “three zones”theory,rock displacement belt theory and numerical simulation method are adopted to analyze the tailings stability.The results show that,after dealing with the goaf by caving filling method,the surface horizon-tal displacement variation and vertical displacement variation are within the standard range,the minimum distance of surface subsidence fissure belt to tailings is 127 m,the goaf treatment could ensure the surface tailings stability,with the further mining of the deep ore-body of the mine,it is necessary to strengthen the monitoring of surface crack zone so as to ensure the safety of surface tailings.