缓倾斜薄矿体分段空场法开采采场结构参数优化研究

Study on Optimization of Stope Structure Parameters in Sublevel Open Stope Mining of Gently Inclined Thin Ore Body

缓倾斜薄矿体安全高效开采直接关系到矿山的高质量发展。基于室内试验与Hoek-Brown岩石强度标准来确定岩体力学性质,并利用3DMine-Midas GTS耦合技术构建了矿山三维数值模型,采用FLAC 3D软件对四种采场结构参数方案下的采场顶底板位移、最大/最小主应力和塑性区分布进行了模拟分析。发现极限暴露面积低于600 m^(2)时采场是稳定的,并建议采场结构参数取值为40 m×15 m。

The safe and efficient mining of gently inclined thin ore bodies is directly related to the high-quality development of mines.In the study,based on the laboratory test and Hoek-Brown rock strength criterion,the mechanical properties of rock mass were determined.The three-dimensional numerical model of the mine was constructed by using 3DMine-Midas GTS coupling technology.By the FLAC 3D software,the displacement,maximum/minimum principal stress and plastic zone distribution of the roof and floor of the stope under four kinds of stope structure parameters were simulated and analyzed.It was found that the stope is stable when the ultimate exposed area is less than 600 m^(2),and the structural parameters of the stope are suggested to be 40 m×15 m.