海下点柱式开采的有限元动态模拟分析
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摘要
三山岛金矿是我国第一个进行海底采矿的硬岩矿山,矿山采用点柱式机械化上向水平分层充填法开采。通过ANSYS有限元数值模拟方法,定量地计算和分析矿体开采过程中采场充填后不同开采步骤下采场顶底板和点柱的应力、位移和塑性区的分布状况,模拟出它们随每步开采应力和应变的动态变化过程及其规律。将分析结果应用于工程实际,为三山岛金矿新立矿区海底安全高效开采矿石资源提供了技术保障。
Sanshandao Gold Mine is the first hard rock mine carrying out under-sea mining in China,which adopts the mechanical upward horizontal slice stoping-filling method with pointed pillars.ANSYS finite element numerical simulation method was used to calculate and analyze quantitatively the distribution of the stress,displacement and plastic zone of the stop roof,floor and point pillars in the different mining steps after the filling,and to simulate their dynamic change process and regularity with the stoping stress and strain of each step.The analysis results were used in the practical engineering,providing a technical support to an efficient safety under-sea mining in Xinli mineral zone of Sanshandao Gold Mine.
Sanshandao Gold Mine is the first hard rock mine carrying out under-sea mining in China,which adopts the mechanical upward horizontal slice stoping-filling method with pointed pillars.ANSYS finite element numerical simulation method was used to calculate and analyze quantitatively the distribution of the stress,displacement and plastic zone of the stop roof,floor and point pillars in the different mining steps after the filling,and to simulate their dynamic change process and regularity with the stoping stress and strain of each step.The analysis results were used in the practical engineering,providing a technical support to an efficient safety under-sea mining in Xinli mineral zone of Sanshandao Gold Mine.
引文
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[4]蔡美峰.金属矿山采矿设计优化与地压控制[M].北京:科技出版社,2001.
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[6]Wang X B,Yang X B,Zhang Z H,eta1.Dynamic analysis of faultrock burst based on gradient-dependent plasticity and energy crite-rion[J].Journal of University of Science and Technology Beijing,2004,11(1):5-9.
[7]Wang X B,Dai S H,Hai L.Quantitative calculation of dissipatedenergy of fault rock burst based on gradient-dependent plasticity[J].Journal of University of Science and Technology Beijing,2004,11(3):197-201.
[8]于学馥,郑颖人.地下工程围岩稳定分析[M].北京:煤炭工业出版社,1983.
[9]高谦.地下大跨度采场围岩突变失稳风险预测[J].岩土工程学报,2000,22(5):523-526.
[10]武汉安全工程研究院.某锡矿区采空区特大事故隐患的调研及治理方案有限元计算分析报告[R].武汉:武汉安全工程研究院,1998.
[11]周麟.房柱采矿法采场顶板的可靠性分析[J].金属矿山,1998(1):17-20.
[12]邱贤德,黄木坤,王心飞,等.数值计算在采空区稳定性评价中的应用[J].矿山压力与顶板管理,2002(4):105-110.
[13]熊仁钦.顶板大面积来压破坏机理的研究[J].煤炭学报,1995(1):86-88.
[14]刘敦文,古德生,徐国元.地下矿山采空区处理方法的评价与优选[J].中国矿业,2004,13(8):52-55.
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