摘要
针对普庆铁矿拟抽采部分矿房底柱对采场整体稳定性的影响,采用三维有限元法,对其回采过程进行了数值模拟和RMR岩体分类法对比分析。模拟结果表明,部分底柱抽采后,起关键支撑作用的底板横撑和矿柱中的应力有显著地变化,这可能破坏矿山整体稳定性。根据回采后应力场的变化规律,提出了采场尚存矿源的下一步回采建议。
In view of the infection of part extraction of stope floor pillar on the integral stability of stope in Puqing Iron Mine, the floor pillar extraction was simulated with 3D FEM, the results of rock mass rating（RMR） classification were compared and analyzed. The results of numerical simulation showed that if the floor pillar is mined partially, the stress in pillars will sharply increase, so inte^al stability of mine may weaken. Based on the distribution patterns of stress field after floor pillar extraction, some suggestions were presented for the future mining of the ore remained in stope.
出处
《矿业研究与开发》
CAS
北大核心
2008年第3期6-8,共3页
Mining Research and Development
基金
湖北省教育厅科学研究项目基金资助(D200711002)
