The rule of surface movement and deformation based on super-subcritical exploitation in deep-lying conditions

Abstract：With the increasing depth of mining exploitation, it is apt to reach the degree of super-subcritical exploitation in the direction of dip working face.Compared with the condition of shallow mining, the law of surface movement and deformation is difference in deep mining.Base on observed data, the paper analyzes the features of surface movement and deformation, and calculates working face exploitation degree and extension of surface subsidence basin under the condition of super-subcritical exploitation work.The surface deformation characters and inflection points location are also described detailedly.It is valuable and instructive in guiding the similar geological condition exploitation and mining large quantities of coal under building.

Keyword：super-subcritical exploitation;mining subsidence;mining degree;deep mining;