Abstract: Research on movement law of surface and rock strata for a mine with great mining depth and thick alluvium is carried out.Through the establishment of surface movement and deformation observation station，the field data are obtained.With use of theoretical analysis and numerical simulation method，the deformation laws of surface and rock strata for a mine with great mining depth and thick alluvium is gained.Surface deformation characteristics are analyzed by using 1stOpt data processing software，and the field rock shift angle parameters are measured.The regression analysis by 1stOpt software can gain the relationship of geological and mining factors and rock movement parameters.Through the numerical simulation，the strain characteristics of mining rock and the distribution characteristics of surface movement and deformation under conditions of great mining depth and thick alluvium are analyzed.

Key words: Thick unconsolidated layers, Great mining depth, Mining subsidence, 1stOpt