Abstract: When mining inclined thin ore body，the problem of ore transportation is very difficult to solve. Combined with the actual mining of Dawan underground phosphorus mine，a segmented room and pillar mining technology with trackless equipment is proposed，and the method for determining the angle between the pseudo inclined plane of the stope and the trend of the ore body is designed. The stope is reasonably divided into several sections，so as to effectively slow down the pscudo inclined slope of the trackless equipment to carry out the mining efficiently and safely. The practical results of the scheme show that it can reduce the comprehensive cost of mining and the index of poor loss，improve the economic benefits of enterprises and have a good application prospect.

Key words: phosphorus mine, mining plan, room and pillar method, false incline, inclined thin ore body