某水下金属矿床开采过程数值模拟分析
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摘要
为研究某水下矿床开采的安全性与稳定性,采用ABAQUS有限元分析软件建立了该矿床的三维数值模型,在模型中布置应力与位移监测点,计算开挖过程中各监测点的应力与位移。结果表明:1开挖初期整体沉降呈线性增长,但沉降值的增加幅度随着开挖的进行呈减小趋势;2当向上开挖至-95 m时,基岩层的剪应力超过剪应力容许值,基岩极可能产生贯通裂隙,采场具有灌水的安全隐患;3采场人工假顶的边缘处最易出现应力集中,截面弯矩较大。分析结果有利于该矿山合理确定开采上限,采取合理措施确保采场稳定性,从而实现安全开采。
In order to study the safety and stability of underwater mining,a three-dimensional numerical model of a underwater metal mine is established by using ABAQUS software.The monitoring points are set in the model so as to monitor the stress and displacement in the process of model excavation,so the stress and displacement of key points of the model are calculated accurately.The numerical simulation analysis results show that:1the subsidence with the trend of linear growth during the initial excavation,but the growth of the subsidence values show a tendency of decrease along with the excavation; 2when excavation up to-95 m,the bedrock layer shear stress is greater than the shear stress tolerance value,the bedrock is likely to produce the transfixion crack,water may pour in stope; 3the stress concentration phenomenon is most likely to appeared in the stope artificial false roof,the cross section bending moment is large than that of edge.The above simulation analysis results of this paper is helpful to mine managers to make reasonable upper limit of mining,and take proper measures to ensure the stope stability and ensure the personnel and property safety during the process of underwater mining.
In order to study the safety and stability of underwater mining,a three-dimensional numerical model of a underwater metal mine is established by using ABAQUS software.The monitoring points are set in the model so as to monitor the stress and displacement in the process of model excavation,so the stress and displacement of key points of the model are calculated accurately.The numerical simulation analysis results show that:1the subsidence with the trend of linear growth during the initial excavation,but the growth of the subsidence values show a tendency of decrease along with the excavation; 2when excavation up to-95 m,the bedrock layer shear stress is greater than the shear stress tolerance value,the bedrock is likely to produce the transfixion crack,water may pour in stope; 3the stress concentration phenomenon is most likely to appeared in the stope artificial false roof,the cross section bending moment is large than that of edge.The above simulation analysis results of this paper is helpful to mine managers to make reasonable upper limit of mining,and take proper measures to ensure the stope stability and ensure the personnel and property safety during the process of underwater mining.
引文
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[12]杨官涛,李夕兵,程刚,等.地下采场结构参数数值模拟研究[J].矿冶工程,2006,26(5):13-15.
[13]刘晓明,杨承祥,罗周全,等.深井开采回采顺序数值模拟优化研究[J].南华大学学报:自然科学版,2008,22(4):15-21.
[14]陈红江,李夕兵,刘爱华,等.水下开采顶板突水相似物理模型试验研究[J].中国矿业大学学报,2010(6):854-856.
[2]过江,彭续承.我国金属矿床水下开采的科技现状及发展趋势[J].有色矿冶,1997(1):5-6.
[3]高峰,周科平,胡建华,等.采场稳定性的模糊物元评价模型及应用研究[J].采矿与安全工程学报,2006,23(2):164-168.
[4]陶干强,任青云,罗辉,等.无底柱分段崩落法采场稳定性分析[J].岩土力学,2011,32(12):3768-3772.
[5]杨仕教,丁德馨,古德生,等.丰山铜矿采场稳定性的FUZZY综合评判[J].有色金属:矿山部分,2002,54(3):99-102.
[6]苏永华,曹文贵.乳山金矿采场力学稳定性模拟研究[J].岩石力学与工程学报,2002(S):2360-2365.
[7]邓红卫,胡普仑,周科平,等.采场结构参数敏感性正交数值模拟试验研究[J].中南大学学报:自然科学版,2013,44(6):2463-2469.
[8]刘晓明,罗周全,张保,等.上向分层回采采场稳定性数值模拟研究[J].矿冶工程,2009,29(4):10-13.
[9]李兴国,赵东寅.下向回采和充填顺序对采场稳定性影响的模拟研究[J].金属矿山,2012(1):13-17.
[10]董凯程,曹辉,解联库,等.地下采场稳定性数值模拟研究及结构参数优化[J].有色金属:矿山部分,2012,64(4):19-22.
[11]董金奎,冯夏庭,张希巍,等.地下采场破碎岩体稳定性评价与参数优化[J].东北大学学报:自然科学版,2013,34(9):1322-1326.
[12]杨官涛,李夕兵,程刚,等.地下采场结构参数数值模拟研究[J].矿冶工程,2006,26(5):13-15.
[13]刘晓明,杨承祥,罗周全,等.深井开采回采顺序数值模拟优化研究[J].南华大学学报:自然科学版,2008,22(4):15-21.
[14]陈红江,李夕兵,刘爱华,等.水下开采顶板突水相似物理模型试验研究[J].中国矿业大学学报,2010(6):854-856.