浅埋煤层覆岩移动及破坏数值模拟研究

his paper does some research on overburden movement and destruction in shallow coal seam mining based on the field observation and numerical simulation for the Tang gonggou coal company. The results are as follows: the overburden is loose, the Periodic weighting distance is short; the overburden present as "three-zone" destrubution significantly; the fractures of the overburden expend to the land surface, however, the fractures are all small and the land surface sunks as a form of basin. the numerical simulation results and the field observation are a little different while the laws are the same, thus this research may give some proposal to the engineering.