| 断层对采空区地表沉降影响的模拟 |
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| 引用本文： | 张敏,佴磊,郭源,吕岩.断层对采空区地表沉降影响的模拟[J].吉林大学学报(地球科学版),2012,42(6):1834-1838. |
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| 作者姓名： | 张敏 佴磊 郭源 吕岩 |
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| 作者单位： | 吉林大学建设工程学院，长春130026 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目(98018706) |
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| 摘 要： | 断层是影响采空区地表沉降的重要因素。针对这一问题，采用数值模拟的方法，建立矿山地层、断层和采空区的三维地质模型，对比有无断层时，采空区地表沉降的变化规律，并详细分析了断层倾角、断层与采空区相对位置关系、断层摩擦强度等因素对沉降规律的影响。研究表明：断层不仅对采空区沉降起放大作用，同时对地表沉降变形起隔断作用。断层的存在使地表塌陷盆地中心向断层方向偏移。断层倾角在40°~50°时，地表沉降量出现最大值;断层倾角在35°~40°时，采空区顶板下沉量出现最大值。随着断层抗剪强度的减弱，采空区地表沉降量增大；但当断层的内摩擦角大于或等于周围地层的内摩擦角时，断层内摩擦角的增大对地表沉降量的影响不明显。
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| 关 键 词： | 采空区 沉降规律 断层 数值模拟 沉降 |
| 收稿时间： | 2012-03-06 |
Simulation on Influence of Fault on Goaf Surface Subsidence |
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| Zhang Min,Nie Lei,Guo Yuan,Lü Yan.Simulation on Influence of Fault on Goaf Surface Subsidence[J].Journal of Jilin Unviersity:Earth Science Edition,2012,42(6):1834-1838. |
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| Authors: | Zhang Min Nie Lei Guo Yuan Lü Yan |
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| Institution: | College of Construction Engineering, Jilin University, Changchun130026, China |
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| Abstract: | Fault is an important factor to influence ground subsidence above goaf. To solve this problem, a 3-D geological model of the goaf has been built by using the numerical method. To contrast the existence of the fault, the rule of the goaf surface subsidence has been discussed. The settlement which are affected by the dip angle of a fault, its relative position with the mined-out zone, and its mechanical properties are analyzed in detail. The research shows that the fault enlarges the settlement values, and discontinues the surface deformation. The existence of the fault makes the settlement basin center deviate to the fault side. When the dip angle of a fault is between 40 to 50 degrees, the maximum volume of the surface subsidence appeared. When the dip angle is between 35 to 40 degrees, the maximum volume of the goaf roof subsidence appeared. The decline of the shear strength of fault accelerates the settlement value, and as it approaches or exceeds the soil friction angle, this relation is weakened. |
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| Keywords: | goaf settlement law fault numerical simulation subsidence |
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