Abstract: In order to solve the hydraulic powered supports jammed accident occurred during the terminal mining of the fully mechanized 7 m high cutting coal face, based on the hydraulic powered supports jammed accident occurred during the run-through of the terminal mining in No. 52304 fully mechanized high cutting coal face i n Daliuta Mine, the theoretical analysis and the site observation method were applied to analyze the causes of the hydraulic powered supports jammed and roof fall acci dents, discovered the mechanism of the serious mine strata pressure behavior occurred in the coal mining face, analyzed the mine strata pressure behavior law during t he terminal mining stage and provided the technical plan to handle the hydraulic powered supports jammed.The key measures to prevent the hydraulic powered support S jammed accident occurred were set up in the mine roadway design, roof control, engineering quality, management understanding and other aspects.