某铜矿经过多年开采,采场结构参数未及时改进,导致矿山生过程中存在安全性差、开采效率低等问题.为了保证矿山采空区安全稳定,合理提升生产效益,通过拓展Mathews稳定图法及数值模拟对采场结构参数进行优化.结果表明:利用拓展Mathews稳定图法确定采场顶板稳定性水力半径为4.4 m,采场边帮稳定性水力半径为10.0 m.结合位移、塑性区云图,在间柱宽度为10m时,内部塑性区存在连通现象,不利于采场长期稳定,间柱宽度应在12m以上.采场长度为40 m、边帮高度为40m时,建议采场宽度为10 m,间柱宽度为12 m.
Stope Structure Parameter Optimization of Shallow Hole Shrinkage Subsequent Filling Method in a Copper Mine
After years of mining in a copper mine,the structural parameters of the stope have not been improved in time,resulting in poor safety and low mining efficiency in the process of mining.In order to en-sure the safety and stability of the mine goaf and reasonably improve the production efficiency,the stope structure parameters are optimized by extended Mathews stability diagram method and numerical simulation.The results show that the hydraulic radius of stope roof stability is determined to be 4.4 m by using the ex-tended Mathews stability diagram method,and the hydraulic radius of stope side stability is 10.0 m.Com-bined with the cloud diagram of displacement and plastic zone,when the width of the pillar is 10 m,the in-ternal plastic zone is connected,which is not conducive to the long-term stability of the stope,and the width of the pillar should be more than 12 m.When the length of the stope is 40 m and the height of the side wall is 40 m,it is recommended that the width of the stope is 10 m and the width of the pillar is 12 m.
NETL
NSTL
万方数据
