Application of pipe umbrella support tunneling system in undergound mines in North Macedonia

Stability of the excavation face in shallow tunnels and in poor ground is at present a relevant problem in tunnelling. One of the methods used in such cases is Pipe Umbrella Support Tunneling System. The calculation procedure is based on analysis of the ground characteristics, the dimensions of the structure and on its depth with respect to the ground surface, excavation face reinforcements elements,pre-support works,free length and groundwater. The supporting is an extremely important work operation in the constructionof underground mining facilities. In this paper is given a modification of the Pipe Umbrella Support Tunneling System, used in the supporting of the decline, in an underground mine in our country.