寺河矿大采高开采地表移动现场监测及预测

Field observation and prediction of surface displacement for large mining height at Sihe Mine

以晋城矿区厚覆盖层下开采引起的地表移动为研究对象,在采煤工作面上方地表走向和倾向布置混凝土灌注测点,采用GPS快速静态定位测试与动态测试相结合的方法,对工作面回采后地表移动量进行了监测。采用MATLAB软件对地表移动数据进行分析,运用概率积分法得到工作面上方走向和倾向地表下沉曲线。结果表明,该区域内走向下沉最大值达4.692m,倾向最大下沉值为4.043m,充分采动后埋深采高之比与下沉量呈负相关关系;概率积分法对该区域内地表沉降预测较为准确,走向平均相对误差为4.7%;该区域地表下沉活跃期约130d。

Mininginduced surface movements in thick overburden area of Jincheng mining area were investigated. The meas urement data of surface displacement along dip and dip direction were collected through the combined fast and static GPS positio ning test. The data were analyzed and processed by MATLAB software, and the curves of surface displacement above the work face along dip and dip direction were obtained through probability integral method. The results showed that the maximum dis placement along dip in this area was 4. 692 m, and the maximum displacement value along dip direction was 4. 043 m. The ratio of buried depth to mining height was negatively correlated with the displacements the probability integral method was accurate and the relative error was only 4.7 % along dips the surface displacement was active during about 130 days. Key words forecasting model, surface displacement, large mining height, flat coal seam, surface displacement