某铁矿地下开采围岩稳定性FLAC^3D数值模拟分析研究  

Study on the Surrounding Rock Stability of an Underground Iron Mine Based on FLAC^3D

作　　者：李轶 LI Yi(Guizhou Anke Labor Protection Technology Co.,Ltd.,Guiyang 550000,China)

机构地区：[1]贵州安科劳动保护技术有限责任公司,贵州贵阳550000

出　　处：《昆明冶金高等专科学校学报》2020年第5期20-25,共6页Journal of Kunming Metallurgy College

摘　　要：针对某铁矿以倾斜矿体为主、矿体厚大、品位高、围岩稳固、地表需保护的特点,选择了点柱式上向分层充填采矿法,同时阐述了该采矿方法的开采工艺。为了确保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,对采场长度40 m、间柱4 m宽、点矿柱5 m×5 m,点柱净间距8.5 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;分层作业顶板产生的塑性区高度较小,地表下沉变形很小,说明采用点柱式上向分层充填采矿法开采不会对地表造成安全威胁;同时也验证了该采矿方法工艺具有高效、成本低的优势,为矿山的安全高效生产提供了理论支撑依据。The paper adopts the point-pillar upward layered filling mining method on the basis of the characteristics of an iron mine such as inclined orebody,thick ore body,high-bench,rockmass stability and protection need to the surface.It also illustrates the mining technology of as designed.To ensure the reliability and rationality of safe use of the mining method,the stope structure parameters are as follows:the stope length is 40 m,the inter pillar 4 m wide,the spot pillar 5 m×5 m,and the net spacing between the point pillars 8.5 m.Stability of the stope with this structural parameter is simulated by FLAC^3D software.Simulation results show that the stope structural parameters have certain feasibility,rationality and security in the case of filling;the height of plastic zone produced by slicing operation is small,and the surface subsidence deformation is very small,which indicates that the safety of mining with point-pillar upward layered filling mining method will not present safety risks to the surface.It is also proved that the mining method has the advantages of high efficiency and low cost.The research results provide a theoretical basis for the safe and efficient production of the mine.

关 键 词：地下开采 矿柱 稳定性分析 充填体 地表下沉 

分 类 号：TD335.1[矿业工程—矿井建设]