山西地堑系现今构造应力场的三维数值模拟
|
摘要
利用ANSYS数值模拟软件运用有限法模拟了山西地堑系现今构造应力场的分布特征。模型的构建主要基于山西地堑系精细的三维地震数据体及接近真实的地质情况。根据模拟结果,定量的分析了山西地堑系第一主应力、第三主应力及应力强度的分布特征,得出以下认识:1山西地堑系内盆地主要受张应力控制,盆地边缘地壳应力值较大,尤以大同盆地和太原盆地比较突出;2地堑系内NE向断裂主要受压应力控制,而NW向断裂主要受张应力控制;3在大同盆地中南侧的六陵山山前断裂受到挤压应力值非常大,岩石易发生挤压破碎发生地震,应该重点观测。
The present- day stress field of the Shanxi graben is anlysized using finite element modeling( FEM) by ANSYS numerical simulation software. The models are constructed based on 3D seismic data and the actual geologic situation. According to the simulation results,we quantitatively explain the distribution characteristics of the first / third principal stresses and stress intensity. The results are as followed: The Shanxi graben system basins are controlled by the tension stress,and the crust stress of basin edge is larger,especially in the Datong Basin and Taiyuan Basin. The NE faults in Shanxi graben are mainly affected by the extrusion stress and NW fault are mainly affected by the tensile stress. Liu Ling Mountain piedmont fault located in the south of Datong Basin compression stress value is very big,The rock crushing occur and cause earthquakes easily,the area Should focus on monitoring. The action of tensile stress.
The present- day stress field of the Shanxi graben is anlysized using finite element modeling( FEM) by ANSYS numerical simulation software. The models are constructed based on 3D seismic data and the actual geologic situation. According to the simulation results,we quantitatively explain the distribution characteristics of the first / third principal stresses and stress intensity. The results are as followed: The Shanxi graben system basins are controlled by the tension stress,and the crust stress of basin edge is larger,especially in the Datong Basin and Taiyuan Basin. The NE faults in Shanxi graben are mainly affected by the extrusion stress and NW fault are mainly affected by the tensile stress. Liu Ling Mountain piedmont fault located in the south of Datong Basin compression stress value is very big,The rock crushing occur and cause earthquakes easily,the area Should focus on monitoring. The action of tensile stress.
引文
[1]徐锡伟,邓起东,董瑞树,等.山西地堑系强震的活动规律和危险区段的研究[J].地震地质,1992,14(4):305~316.
[2]梁海庆,杨增学,郭启良,等.山西地堑系现今构造应力场特征[J].地震学报,1986,2(1):47~52.
[3]瞿伟,张勤,王庆良,等.利用GPS观测资料分析山西地堑系现今地壳构造活动特征[J].武汉大学学报,2012,37(2):195~198.
[4]罗焕炎,孔祥红,高维安,等.山西断陷盆地带形成机制的初步数值模拟[J].地震地质,1988,10(1):71~77.
[5]安美建,李方全,等.山西地堑系现今构造应力场[J].地震学报,1998,20(5):461~465.
[6]李树德.中国东部大同火山群发育的构造地貌背景[J].地理学报,1988,43(3):233~239.
[7]李树德.中国东部山西地堑系的形成机制及构造地貌、地震探讨,1997,33(4):467~474.
[8]戴黎明,李三忠,楼达,等.渤海湾盆地黄骅坳陷应力场的三维数值模拟分析[J].地球物理学报,2013,56(3):929~942.
[9]鞠紫云.紫荆关断裂在太行山北段的特征及其发生发展过程的推论[J].中国区域地质,1983,56~65.
[10]江娃利,王焕贞.山西大同与晋中盆地全新世活动断裂定量研究中热释光与14C测年方法应用[J].第四纪研究,2004,24(3):332~339.
[11]段瑞涛,方仲景.六棱山北麓断裂新活动特征[J].地震地质,1995,17(3):207~213.
[12]易锦俊.山西地堑系活动断裂与地震_地裂缝灾害研究[D].长安大学,2008:8~54.
[13]郭慧,江娃利,谢新生.山西交城断裂北端及中段3个大型探槽全新世断错现象分析[J],地震地质,2012,34(1):76~92.
[14]谢新生,江娃利,陈焕珍,等.山西太古断裂带全新世活动及其与1303年洪洞8级地震的关系[J].地震学报,2004,26(3):281~293.
[15]许建红,谢新生,孙昌斌.山西罗云山山前断裂带中段龙祠-峪口全新世活动证据[J].地震地质,2011,33(4):855~864.
[16]Wang J,Ye Z R,He J K.Three-dimensional mechanical modeling of large-scale deformation in China constrained by the GPS velocity field.Tectonophysics,2008,446:51~56.
[17]He J K.Jean C.Slip rates of the Altyn Tagh,Kunlun and karakorum faults(Tibet)from 3D mechanical modeling.Earth Planet.Sci.Lett.,2008,274:50~58.
[18]江在森,马宗晋,张希,等.2003.GPS初步结果揭示的中国陆地水平应变场与构造变形[J].地球物理学报,46(3):352~358.
[2]梁海庆,杨增学,郭启良,等.山西地堑系现今构造应力场特征[J].地震学报,1986,2(1):47~52.
[3]瞿伟,张勤,王庆良,等.利用GPS观测资料分析山西地堑系现今地壳构造活动特征[J].武汉大学学报,2012,37(2):195~198.
[4]罗焕炎,孔祥红,高维安,等.山西断陷盆地带形成机制的初步数值模拟[J].地震地质,1988,10(1):71~77.
[5]安美建,李方全,等.山西地堑系现今构造应力场[J].地震学报,1998,20(5):461~465.
[6]李树德.中国东部大同火山群发育的构造地貌背景[J].地理学报,1988,43(3):233~239.
[7]李树德.中国东部山西地堑系的形成机制及构造地貌、地震探讨,1997,33(4):467~474.
[8]戴黎明,李三忠,楼达,等.渤海湾盆地黄骅坳陷应力场的三维数值模拟分析[J].地球物理学报,2013,56(3):929~942.
[9]鞠紫云.紫荆关断裂在太行山北段的特征及其发生发展过程的推论[J].中国区域地质,1983,56~65.
[10]江娃利,王焕贞.山西大同与晋中盆地全新世活动断裂定量研究中热释光与14C测年方法应用[J].第四纪研究,2004,24(3):332~339.
[11]段瑞涛,方仲景.六棱山北麓断裂新活动特征[J].地震地质,1995,17(3):207~213.
[12]易锦俊.山西地堑系活动断裂与地震_地裂缝灾害研究[D].长安大学,2008:8~54.
[13]郭慧,江娃利,谢新生.山西交城断裂北端及中段3个大型探槽全新世断错现象分析[J],地震地质,2012,34(1):76~92.
[14]谢新生,江娃利,陈焕珍,等.山西太古断裂带全新世活动及其与1303年洪洞8级地震的关系[J].地震学报,2004,26(3):281~293.
[15]许建红,谢新生,孙昌斌.山西罗云山山前断裂带中段龙祠-峪口全新世活动证据[J].地震地质,2011,33(4):855~864.
[16]Wang J,Ye Z R,He J K.Three-dimensional mechanical modeling of large-scale deformation in China constrained by the GPS velocity field.Tectonophysics,2008,446:51~56.
[17]He J K.Jean C.Slip rates of the Altyn Tagh,Kunlun and karakorum faults(Tibet)from 3D mechanical modeling.Earth Planet.Sci.Lett.,2008,274:50~58.
[18]江在森,马宗晋,张希,等.2003.GPS初步结果揭示的中国陆地水平应变场与构造变形[J].地球物理学报,46(3):352~358.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心