论文部分内容阅读
建筑物下开采资源时,必须对开采引起的地表沉陷及其对建筑物的影响进行评价,确保建筑物的安全。针对赵平房铁矿矿体的急倾斜特性,结合空场嗣后充填采矿方法,运用有限元分析软件进行数值模拟分析,获得了矿体开采、充填后地表的移动变形规律,以地表倾斜、曲率和水平变形为评价指标,研究了地表的沉陷特性。数值模拟结果显示,两步骤开采引起的地表竖直方向最大位移为0.37 m,倾斜、曲率和水平变形最大值分别为0.794 mm/m、0.0096mm/m2、0.710 mm/m,其值均远低于我国建筑物的保护等级标准。结果表明,赵平房铁矿矿体的充填开采对地表建筑物沉降安全的影响不明显。
When mining resources under buildings, the surface subsidence caused by mining and its impact on the buildings must be evaluated to ensure the safety of the buildings. According to the steep slope characteristics of the ore bodies in Zhao Pingfang Iron Mine, the finite element analysis software was used to carry out numerical simulation combining with the post-fill mining method in the empty field. The movement and deformation of the ground after the ore body mining and filling were obtained. Horizontal deformation as an evaluation index, the study of the surface subsidence characteristics. The results of numerical simulation show that the maximum vertical displacement in the vertical direction caused by two-step mining is 0.37 m, and the maximum values of inclination, curvature and horizontal deformation are 0.794 mm / m, 0.0096 mm / m2 and 0.710 mm / m respectively, In our country building protection level standards. The results show that the effect of filling and mining of Zhao Pingfang iron ore body on the settlement safety of surface buildings is not obvious.