In this paper,the characteristics of ground-pressure are studied at gob-side entry retained in Jixi Coal-mining Group Company.

It analyzed the geological environment,the roof and floor of the coal bed firstly,then made a plan for strata control observation,did an actual measure and analysis of the fully mechanized support working resistance,the single hydraulic prop yield load and the roadway wall rock distortion,resulted the law of the ground behaviour.

According to the site obseration the regtilarity of ground behaviour at the ends of working face is analysed by the rock plate theory,and the characteristics and the supporting system at the ends of working face are discussed in the paper.

Study on strata behavior regularity of step soft seam fully mechanized coal face;

Study on strata behavior regularity of the working-face with thin coal seam and stiff roof;

Studies of strata behavior regularity of fully mechanized caving mining working face;

Study on time-space relation and interaction of strata behaviors within multi-seam mining;

Characteristics of strata behaviors of fully mechanized caving face in soft coal and stable roof conditions;

The distribution patterns of surrounding-rock stress and strata behaviors are two key factors in roadway layout and coal pillar design.