Analysis on the Strata-pressure Behavior of Fully Mechanized Caving Mining in Undulate and Thick Coal Seam

Through carrying on the field strata control observation of 1301 fully mechanized caving face in Guojiahe coal mine,the movement characteristics of roof rock is analyzed,and the strata-pressure behavior is mastered too.There is certain reference in studying strata-pressure behavior and determining reasonable working resistance of support on fully mechanized caving face of Linbei coal field.