Abstract: In order to explore the causes and corresponding disposal technology of roof fall in fully mechanized working face of 7m large mining height. This paper is based on the roof fall and support pushed down accident in the terminal period of 52303 work face. By using theoretic analysis the law of underground pressure and observe the range of roof fall, the paper researched the reason of this accident and explored the mechanism of strong ground pressure of work face. The disposing method has been introduced in this paper which got useful result. This paper put forward the key technical measures and engineering application practice for deal with support pushed down and roof fall in the shallow buried depth and large mining height working face, and provide technical support for safety and efficient production of mine.

Key words: shallow buried depth, large mining height, support pushed down, roof fall, Marithan, ground pressure