Based on bigger slope of fully mechanized working face, hydraulic support and scraper conveyor with stopped toward falling direction, and scraper conveyor occupied space of the sliding out side of the end supporting, which blocked safety exit. At the same time, supporting width of cutting top secret column was increased, which increased difficulty for maintenance of mined-out area. As a result, principles of pseudo oblique mining were used and two-lane errors were adjusted to decline resistance of the equipment. Meanwhile, the method of using single - directional jacking was adopted to prevent and control the slide of frame and scraper conveyor, which not only saved the artificial expansion, but also reduced workload of increasing emergency exits and maintenance of two lane ends.