Support at the transition between a continuous and a branching roadway

摘要

So that a support at the transition between a continuous (1) and a branching (2) roadway in underground mining and tunnelling, in which section girders (5) of polygonal design having a higher moment of resistance compared with the roadway support arches (3) are arranged in the mouth area of the branch roadway, is designed in such a way that it can be placed during the driving and quickly achieves the required bearing capacity, and no additional excavation is necessary and no remaining auxiliary structure is required, the polygonal girder (5), at the side facing the roadway floor (7), has fastening points to which auxiliary posts (10) movably linked via releasable fastening means are fastened during the setting of the support. <IMAGE>