Abstract: The hanging wall development works of Yanqianshan Iron Mine are often arranged in the soft broken rock-mass.With the increasing of mining depth，the hanging wall development occur severe deformation in deep high stress.Through investigation to identify the location and deformation form of deep underground pressure in the mine，the stability of development roadway in deep stress is analyzed，and the additional pressure that is the hanging wall wedge imposed to the development work is calculated and analyzed.And finally the determination method of the yield development scheme and the yield parameters are proposed.Practice shows that yield development method can effectively reduce that deep high stress damages to the development system in the hanging wall′s soft broken rock，and save at least 500 m development work for each extracting stage.All these bring huge economic benefits for the mine.

Key words: Deep high stress, Soft broken rock-mass, Wedge pressure, Yield development