Abstract: In order to prevent a roof falling in an abandoned gateway, roof falling in a front of the powered support and other accidents occurred during a mining pro cess of No.4701 fully- mechanized top coal caving mining face passing through the abandoned gateway in Honghui No.4 Mine and to ensure in time support during the mining process of coal mining face, with establishment of powered support mechanics model when the coal mining face was in normal pushing forward and the coal min ing face was closed to the abandoned gateway, stress status of the powered support was studied when the coal mining face was in normal pushing forward process and was closed to the abandoned gateway. The study results showed that when the coal mining face was passing through the abandoned gateway, a working resistance of t he powered support would be increased and would be 1. 5 ~ 2. 0 times higher than a normal periodical roof weighting. When an advance abandoned gateway support pl an combined with wood stacks and mineral waste backlilling applied, deformation of surrounding rock section in the abandoned gateway could be well controlled with sI ab beams setting on the seam floor, false- inclined mining face, rapid pushing forward speed, a controlled top coal caving quantity when the coal mining face passing th rough the abandoned gateway, powered support forward moving with a closed pressure against with the roof and other comprehensive technical measures in order to e nsure safety mining of the fully- mechanized top coal caving face passing through the abandoned gateway.