程潮铁矿采场地压变化规律与控制技术研究

以程潮铁矿东西区开采进度整体调整为工程背景,以FLAC软件为研究手段,建立数值计算模型,设计出5种可行的开采进度方案,通过对比分析每个方案的最大和最小主应力大小,塑性区分布规律,垂直和水平位移变化,以及东西区支撑矿柱附近应力集中系数变化情况,确定东区与西区保持同步掘进和回采进度为最优方案。同时,针对开采区域的矿岩分布和上部开采形成的应力分布,实施应力与时间控制的采场巷道综合维护技术,工程应用效果良好。

Research on Change Law and control Techniques of the Stope Ground Pressure in Chengchao Iron Mine

Taking the integrated adjustment of mining process of the east and west mining section of Chengchao Iron Mine as the engineering background,a numerical mode was established with numerical calculate software FLAC,and five feasible schemes of mining process were designed.For the five feasible schemes,the maxima and minor principal stress,the distribution of plastic zone areas,the changes of vertical and horizontal displacement and the stress concentration factor of the support pillar in the east and west mini...