Sujiaping iron ore body is under Luoqunyan coal body.The distance form the top of fomer to the bottom of of the latter is only 60m meters apart.In this paper,the heights of roof caving of tunnels,and broking and subsidence of rock strata in Sujiaping iron mine after excavation are analyxed and calculated.The results show that even if it is collapse that all of the prospeting tunnels of Sujiaping iron mine in extreme cases,the safety of the upper prospecting work of Luoqunyan coal mine is not threatened.The paper draws a conclusion that the mineral prospecting work of Sujiaping iron mine can be carried out with the Luoqunyan coal mine in the same time.