尾矿库加高扩容工程对底部巷道稳定性影响研究

以湖南某金矿所属尾矿库加高扩容工程为例,在调研尾矿库库区底部巷道的分布情况及采用室内岩石力学实验得到所需的岩土体力学参数后,依据设计的尾矿库加高扩容方案,采用FLAC3D数值分析了尾矿库加高扩容工程对其底部巷道稳定性的影响以及底部巷道对今后尾矿库运行的影响。分析结果表明,设计采用的中线式加高方案对对底部巷道稳定性影响较小,底部巷道的开采对尾矿库加高扩容后的正常运行影响较小,并提出加高扩容工程前应对主斜井井口进行封堵。通过本文的研究能够为尾矿库加高扩容工程的设计及今后的运行提供借鉴性的建议。

Study on the Influence of the Heightening Project of Tailings Dam on the Stability of Bottom Roadway

Taking the tailing-tank extension and expansion project of a gold mine in Hunan as an example,after investigating the distribution of the roadway at the bottom of the tailings storage area and adopting indoor rock mechanics experiments to obtain the required rock and soil mechanics parameters,the FLAC3D numerical analysis is used to analyze the influence of the tailings gallery heightening and expansion project on the stability of the roadway at the bottom and the effect of the roadway at the bottom on the operation of the tailings pond in the future,the analysis results show that the midline elevation design adopted in the design has less impact on the stability of the bottom roadway,the mining of the bottom roadway has less impact on the normal operation of the tailing pond after the heightening of the tailing pond,and proposed to block the wellhead of the main inclined well prior to the expansion and expansion project.Through research, it can provide reference for the design and future operation of the tailings expansion project.