In the dangerous mine project of Woxi mining area in Hunan Province, ZK9103 and ZK7304 reveal the V6 alteration layer at the bottom of Yuershan mineral vein V1. In order to alleviate the crisis of resource exploitation of Yuershan, the prospecting method combined vertical drilling at the surface and in the tunnel is used at the first to predict the resource amount of main industrial ore bodies and the position & elevation of occurrence plane, then according to the present tunnel engineering status, the inclined shaft in opposite direction to coal seam in the tunnel + laneway through the mineral vein bottom + inclined shaft bedding floor are arranged to carry out the deep development work and expand the reserves of resources for development. Good prospecting effect is received, and by which, the service life of Yuershan mine is prolonged. It is suggested to expand the exploration line in Shiliupenggong, Hongyanxi and Lijiaxi and some other ore blocks, so as to further expand the prospecting potential of V6 blind vein at the bottom.