Movement Characteristic of Overlying Strata Structure over Long-wall Mining Face in Shallow Buried Coal Seam

Applying discrete element software,stress field distribution characteristic and movement rule of surrounding rock of long-wall mining face in shallow buried coal-seam was analyzed;surrounding strata structure and movement characteristic was researched.Results showed that bearing arch structure could form in stress filed of surrounding rock and the structure could bear load and had the characteristics of continuity,stability and activity.