Study on mining pressure appearance feature in shallow-buried fully-mechanized longwall face

Using field observation combined with data simulation research methods to study mine pressure characteristics and influence factors aimed to the typical shallow-buried long wall face, we master hydraulic support adaptability and mine pressure appearance rule in shallow-buried long wall face. The research results show that, overlying rock structure's stability of shallow-buried long wall face is also affected by mining parameters, such as mining height and length of mining face, etc., besides objective geological conditions. Fissure zones conducting surface (namely, the bedrock layers are all broken periodically) and main roof breaking periodically are key causes that make the roof of shallow-buried long wall face exist two different cycles. And the results provide better references for roof supporting and support selection in mining shallow-buried fully-mechanized working face.