基于Mathews和FLAC^(3D)的采场结构参数优化研究

Optimization of stope structure parameters based on Mathews and FLAC^(3D)

以攀西某地下矿山为例,基于Mathews稳定图法和经验类比法估算采场暴露面积,推荐采场顶板允许暴露面积为800~1200 m^(2),矿体侧帮允许暴露面积为4000~5000 m^(2)。基于FLAC^(3D)数值模拟分析优化采场结构参数,结果表明,随采场长度和阶段高度增大,采场周围的最大拉应力、最大压应力和最大剪应力都呈增加趋势。结合矿山现有开拓系统,推荐攀西某地下矿山阶段高度为60 m,采场长度为60 m。

Taking an underground mine in Panxi as an example,the exposed area of the stope was estimated based on Mathews stability diagram method and empirical analogy method.It is recommended that the allowable exposed area of the stope roof is 800 to 1200 square meters,and the allowable exposed area of the ore body side is 4000 to 5000 square meters.Based on FLAC^(3D)numerical simulation analysis,the stope structure parameters were optimized.The results show that with the increase of stope length and stage height,the maximum tensile stress,maximum compressive stress and maximum shear stress around the stope increase.Combined with the existing development system of the mine,it is recommended that the stage height of an underground mine in Panxi is 60 meters and the length of the stope is 60 meters.