Abstract:Zhaojiaba coal mine is located in Wangchang county,Sichuan province. It is a small-size coal mine with production capacity of 300 kt/a. After comparing mining options in steep inclined thin seam group at Zhaojiaba coal mine,the roadway layout of combined mining is selected. The mining procedure,mining methods,and reasonable malposition under different seams and different mining sections are studied by theoretical analysis,in-situ measurement and numerical calculation. The practices show that the roadway layout of combined mining is safe and economical benefit can be improved. The results of the practice are referable to the design of roadway layout and mining method with similar conditions.