滨海基岩矿床开采防水矿岩柱高度的确定  

Design on the size of waterproof pillar(rock) in subsea bedrock mining

作　　者：吴浩[1] 赵国彦[1] 马少维[1] 曹文卓[1] 姜海涛[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中国地质灾害与防治学报》2014年第1期44-50,共7页The Chinese Journal of Geological Hazard and Control

基　　金：中南大学中央高校基本科研业务费专项资金资助(2013zzts260);国家重点基础研究发展规划("973"计划)项目(2010CB732004)

摘　　要：三山岛金矿新立矿区是国内首家海下开采的金属矿山,为确保海下开采安全和减小矿产资源损失,科学、合理地确定防水矿岩柱尺寸在工程实践中显得尤为重要。根据矿山开采条件,首先,引入等效厚度系数n对采场导水裂隙带高度经验公式进行修正,由此计算防水矿柱的最小高度为(48.1±5.6)m。其次,运用力学解析法从强度和刚度两个方面对2种力学模型下的防水矿柱尺寸进行分析与计算。基于强度条件,拟合出防水矿柱高度与安全系数的回归曲线;基于变形条件,采用积分变形法计算防水矿柱的临界高度分别为37.24m和40.40m。最后,采用Flac3D数值模拟方法得出-200m中段采场导水裂隙带高度为34.75m。综合以上结果,最终确定新立矿区防水矿岩柱的高度为54m。Xinli district of Sanshandao Gold Mine is the first metal mine undersea in China. To ensure safety of mining undersea and reduce the loss of mineral resources, it＇s crucial to design the size of waterproof pillar（rock） scientifically and reasonably in engineering practice. According to the mining conditions, firstly, the paper introduces the equivalent thickness coefficient n to amend the empirical formula of stope＇s water flowing fractured zone, by which, the minimum height of the waterproof pillar calculated is （48. 1 -＋ 5.6） m. Secondly, the paper analyzes and calculates the size of waterproof pillar in two mechanical models of waterproof pillar from the aspects of both strength and stiffness. The regression curve that between the height of waterproof pillar and safety factor is fitted in condition of strength. Then, the critical height of waterproof pillar is 37.24m and 40. 40m respectively, calculated by integral degeneration in condition of strength. Finally, the water flowing fractured zone of-200m stope measured by Flac3D numerical simulation is 34. 75m. Based on the above findings, the height of waterproof pillar（rock）of Xinli district is 54m.

关 键 词：水矿柱 滨海基岩矿床 海下开采 导水裂隙带 突水 

分 类 号：TD857[矿业工程—金属矿开采]