岩体地应力数值分析计算
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摘要
通过对青海格尔木锡铁山二矿区进行取样试验和对矿区及其周围区域地质构造的研究,利用ABAQUS软件,采用三维有限元分析法对矿区地应力场进行反演模拟,定性和定量地分析该矿区的地应力状态,包括其大小、方向及其分布规律,得出该矿区2822水平最大主应力值为8.35～12.80 MPa,方向平均为NW和NE向,最小水平主应力值为4.02～6.15 MPa,水平主应力与垂直主应力比值在1.24～2.46之间。同时对下一阶段的工作提出了合理、有效的建议。
Through the measurement and analysis of samples in the second mining of Xitieshan,Geermu in Qinghai province and its surrounding regions,the three-dimensional finite element analysis method with ABAQUS is adopted to inversely simulate the ground stress of mine area,and the stress state and its distribution regularities are quantitatively or qualitatively determined,including its size,direction,and its distribution.It is achieved that maximum principal stress value is 8.35MPa ～ 12.80 MPa at the 2822 level of mining with the average NW and NE direction.And its minimum horizontal principal stress value is 4.02 ～ 6.15 MPa.The ratio of the principal stress and the vertical principal stress is between 1.24 ～ 2.46.And a reasonable and effective proposal is given for the next phase of the work.
Through the measurement and analysis of samples in the second mining of Xitieshan,Geermu in Qinghai province and its surrounding regions,the three-dimensional finite element analysis method with ABAQUS is adopted to inversely simulate the ground stress of mine area,and the stress state and its distribution regularities are quantitatively or qualitatively determined,including its size,direction,and its distribution.It is achieved that maximum principal stress value is 8.35MPa ～ 12.80 MPa at the 2822 level of mining with the average NW and NE direction.And its minimum horizontal principal stress value is 4.02 ～ 6.15 MPa.The ratio of the principal stress and the vertical principal stress is between 1.24 ～ 2.46.And a reasonable and effective proposal is given for the next phase of the work.
引文
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[2]蔡美峰,乔兰,李华斌.地应力测量原理和技术[M].北京:科学出版社,1995.
[3]邹冠贵,彭苏萍,张辉,等.地震递推反演预测深部灰岩富水区研究[J].中国矿业大学学报,2009,38(3):390-392.
[4]Stephansion Su.The effect of a fault on in situ stresses studied bythe distinct element method[J].International Journal of Rock Me-chanical and Mining Sciences,1999,36:1051-1056.
[5]Potluri N,Zhu D,Hill A D.Effect of natural fractures on hydraulicfracture propagation[J].SPE-European Formation Damage Confer-ence,2005(5):25-27.
[6]李学华,姚强岭,张农.软岩巷道破裂特征与分阶段分区域控制研究[J].中国矿业大学学报,2009,38(5):618-619.
[7]Hast N.The state of stresses in the upper part of the earth's crust[J].Technophysics.1969,8:169-211.
[8]傅鹤林.岩石声发射的Kaiser效应及其在地应力场测试中的应用[J].化工矿物与加工,2002,(5):20-22.
[9]董鹏.初始应力场分析方法的研究[J].地震地磁观察与研究,2008,29(3):14-22.
[10]李如满,汪树栋.锡铁山铅锌矿地质特征——矿床成因及找矿标志[J].矿产与地质,2003,17(3):218-221.
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