基于FLAC^(3D)分析研究某铜矿采场稳定性

Research on the Stability of a Copper Mine Stope Based on FLAC^(3D)Analysis

针对某铜矿以急倾斜矿体为主、矿体中厚、品位高、围岩稳固的特点,选择了浅孔留矿嗣后充填采矿法,同时阐述了该采矿方法的开采工艺。为了确保生产过程中该采矿方法安全使用的可靠性及合理性,采用岩土FLAC^(3D)软件对矿房长度44 m、间柱宽6 m、顶底柱高12 m、中段高度145 m的采场结构参数进行稳定性分析论证,模拟结果表明:在充填的情况下,该采场结构参数具有一定的可行性、合理性和安全保障性;分段开采后顶板产生的塑性区高度有限,说明该矿山现在采用浅孔留矿嗣后充填采矿法开采,采场顶板整体是有稳定保障的,不会对顶板造成显著的安全影响。同时也验证了该采矿工艺具有安全、合理可行、效益高的优势,为矿山的安全高效生产提供了理论依据支撑。

Aiming at the characteristics of a copper mine that is dominated by steep orebodies,medium-thickness ore bodies,high grade and stable surrounding rock,the short hole shrinkage and subsequent filling mine method is selected.At the same time,the mining technology of the mining method is described.In order to ensure the reliability and rationality of safe use of the mining method in the production process,the geotechnical FLAC^(3D)software is used to stabilize the stope structure parameters with a length of 44 m,a pillar 6 m wide,a top and bottom pillar 12 m high,and a middle section height 145 m.Simulation results show that the stope structural parameters have certain feasibility,rationality and security in the case of filling;and the height of roof plastic zone generated by the roof after segmentedmining is limited,which indicates that the safety of mining with the short hole shrinkage followed by filling method is guaranteed and will cause no safety impact on the roof.At the same time,it proves that the mining method has the advantages of safety,reasonableness and high efficiency.The research results provide a theoretical basis for the safe and efficient production of the mine.