某矿井下开采地表沉降范围及发展趋势

通过概率积分法与数值模拟相结合的方式，对山东某铁矿井下开采对地表周边民居建筑的影响进行了研究。分析表明，矿区周边居民住宅位于开采沉降范围边界处，地表变形的倾斜、曲率、水平移动分别为0.08 mm/m、0.009×10^-3 m、0.4 mm/m，符合相关规范要求；数值模拟地表沉降范围较概率积分法计算结果大，同一截面处对比显示，数值模拟中地表沉降宽度达407.6 m，大于概率积分法的366.7 m。矿区沉降监测数据的拟合分析表明，该区域近年来沉降变化斜率小于0.03，地表稳定，没有新的沉降变形趋势。因此，可以认为周边居民小区住宅不会因井下作业受到影响。概率积分法中反映覆岩岩性影响的参数选取可能引起误差，导致依概率积分法计算结果与数值模拟存在差别，在实际运用中应当通过多种方法协同论证，确保结论正确，实现井下生产与居民生活的和谐稳定。

Study on the Ground Subsiding Area Caused by Underground Mining and Its Developing Tendency

Combined with the probability integral method and numerical simulation，the effect that underground mining conduct on the residential buildings around is studied.Results show that the residential buildings are at the boundary of the mining subsiding area，the dipping，curvature and horizontal deformation of subsidence are 0.08 mm/m，0.009×10-3 m，0.4 mm/m respectively，which are within the indexes given in related standards.The subsiding scope in numerical simulation is larger than that in probability integral method.Comparison of the subsiding scope at the same section shows that the subsiding width in numerical simulation is 407.6 m，larger than 366.7 m in probability integral method.Besides，fitting analysis on the subsiding monitoring data shows that the slope of the subsidence changing in recent years is less than 0.03，which means the ground subsiding tends to be steady and there is no new subsiding trend.Therefore，it is concluded that the residential buildings around will not be affected by the underground mining activities.It's found that error may occur in the choosing of the parameter reflecting the property of the overlying stratus，which lead to a difference between the results solved by probability integral method and numerical simulation.It's better to conduct studies in different ways to avoid error in dealing with problems in order to ensure the correction of the results and the harmony between underground mining and people's daily lives.