摘要
结合石人沟铁矿-60 m水平的具体地质条件、采矿技术条件、岩体力学性质,采用相似材料模拟实验和现场监测数据结合印证的方法,对浅孔留矿法开采岩体应力扰动、位移及破坏规律进行研究。得出如下结论:留矿法开采过程中,矿柱经历了应力释放继而逐步承受上部压力最终达到平衡的受力过程;应力集中和变形主要集中在矿柱的下部,在回采靠近底板分层时变化最明显,随着回采高度的增加,矿柱和顶板的变形量逐渐增大,表明在施工过程中,应该加强对穿脉巷道的支护和监测,以维护巷道及间柱的稳定。通过对两种矿柱回采方案的比较,建议应采用上向水平分层法进行矿柱的回收。
Based on the field engineering geology, mining condi- tions and the mechanical properties of rocks, the stress perturba- tions, displacement and failure of surrounding rock caused by shorthole shrinkage mining were studied by similar material simulation experiment and confirming with on - site monitoring data. The following conclusion was got： the pillar underwent a process form stress relief, then gradually withstood pressure to final stresses balancing in the whole process of shrinkage mining; the stress concentration and displacement mainly occurred in the bottom of the pillar, and obviously changed when the slice near the floor of room; With the upward development of the mining, the deformation of the pillar and roof gradually increased, this showed that the support and deformation monitoring of roadway across vein should be strengthened to maintain the stability of the roadway and the interstall pillar. By the comparison of the two kinds of pillar recovery scheme, it was advanced that the pillar is exploited with upward horizontal cut - and - fill stoping method.
出处
《矿业研究与开发》
CAS
北大核心
2012年第6期75-78,88,共5页
Mining Research and Development
关键词
浅孔留矿法
围岩破坏
相似模拟实验
矿柱回收
Short - hole shrinkage mining, Surrounding rockfracture, Similar material simulation experiment, Pillar recovery
