Abstract: During the period of the 11603 working face crossing large fault of the Dananhu No. 7 Coal Mine ，the rock breaking volume was large，the mining speed was slow，the equipment failure rate was high，and the surrounding rock in the advanced stress zone at the tail end was severely broken. The prob⁃ lems existing in the original mining process were analyzed，and the mining process was optimized. The "al⁃ ley method" mining process was implemented. Meanwhile，combined support such as "grouting + dense steel shed + pier column support" was implemented for the surrounding rock in the fault area. The practical application effect shows that after the optimization of the mining process，the rock breaking volume was re⁃ duced by 3 244 m3 ，the equipment failure rate was reduced to 6%，the maintenance cost was reduced by 249 000 yuan，and the mining speed was increased to 4.8 m/d. After optimizing the support of the surround⁃ ing rock in the fault area，the deformation of both sides of the surrounding rock in the advanced stress area was greater than the movement of the top and bottom slabs. The maximum movement of both sides was 0.16 m，the maximum settlement of the top slab was 0.1m，and the maximum bottom bulge was 0.13 m. The over⁃ all stability of the surrounding rock was good，and no accidents such as collapse of both sides or leakage of the bottom slab occurred.

Key words: fully mechanized mining face, large fault, alley methood, permanent support , reinforce support