摘要
矿柱的安全回采是我国金属矿山面临的紧迫问题,直接关系到矿山的可持续发展,在维持矿柱采场稳定的前提下提高其回采率,是残留矿柱安全开采急需解决的问题。以南温河钨矿矿柱回收为研究对象,根据前期现场调研、工程现场监测试验、CMS探测,结合FLAC3D数值模拟等手段,揭示全面法矿柱群应力分布规律,分析了人工矿柱结构参数对房柱法采场稳定性的影响。研究表明:用人工假柱置换原生矿柱后,人工假柱中垂直应力为5~10MPa,水平应力0.1~1MPa,应力值相对较小,且分布较为均匀,未出现应力集中现象;顶板最大下沉量为10.7 mm,底板最大鼓起量为10mm,较原先仅仅依靠矿柱自稳的情况,稳定性得到了有效改善。研究结果为矿山矿柱回收方案选择提供了理论参考,具有重要的工程意义。
The safe recovery of pillars is an urgent problem of metal mines in China,which directly related to the sustainable development of mines.Improving the recovery rate under the premise of maintaining the stability of pillars is an urgent problem for the safe recovery of residual pillars.In this paper,the recovery of the pillars in Nanwenhe Tungsten Mine was taken as the research object.According to the previous site investigation,engineering site monitoring test,CMS detection,FLAC3 D numerical simulation and other means,the stress distribution law of the pillar group mined by comprehensive method was revealed,and the influence of artificial pillar structure parameters on stope stability was analyzed.The research showed that after replacing the original pillars with artificial pillars,the vertical stress of the artificial pillars was 5~10 MPa,the horizontal stress was 0.1~1 MPa,the stress value was relatively small,and the distribution was relatively uniform,no stress concentration occurred.The maximum subsidence of the roof was 10.7 mm,and the maximum bulge of the floor was 10 mm,which were effectively improved compared with the original situation that only depended on the pillars self-stability.The results provided a theoretical reference for the selection of pillar recovery schemes and had an important engineering significance.
作者
哈力马提·阿肯
刘海科
杨福斗
温世平
曹帅
HALIMATI Aken;LIU Haike;YANG Fudou;WEN Shiping;CAO Shuai(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China;Wenshan Malipo Zijin TungstenIndustry Group Co.,Ltd,Wenshan Zhuang Autonomous Prefecture,Yunnan 663000,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第7期42-46,共5页
Mining Research and Development
基金
国家自然科学基金项目(51804017)
中国博士后基金面上项目(2018M631341)
关键词
房柱采矿法
采矿方案
人工假柱
数值模拟
Room and pillar mining method
Mining scheme
Artificial pillar
Numerical simulation
