Research and practices on combined mining for seams with closed distance

According to the special mining conditions of No.N31062 and N31063 coal mining faces in Gedian Mine of Shenhuo Group,the paper studied and made a combined mining plan with up and down coal mining faces.According to the up an d down coal mining face features and the advanced experiences of the combined mining for seams with a closed distance at home and broad,the paper rationally set the mining technology and the alternate distance for the up and down seam mining.Also with the site enhanced management,the combined mining had a successful operation with a saving in the support cost and a relaxation the tension of coal mining faces alternated.