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

Abstract：According to the observation of strata behavior regularity of the working-face in thin coal seam with stiff roof of Dayugou Coal Mine before and after the support reform, the control action of two different kinds of support form to roof is analysed, and strata behavior regularity of the working-face with thin coal seam and stiff roof is disclosed. The study will provide scientific basis for the support reform of working-faces and production and safety management in the future.

Keyword：strata behavior;prop resistance;periodical ground pressure;ground pressure strength;