PILLAR TYPE UNDERGROUND STRUCTURE AND METHOD FOR PILLAR TYPE UNDERGROUND STRUCTURE

摘要

According to the present invention, an internal space 100 formed by excavating a rock layer 1; And a cave 200 supporting the upper surface 110 and the lower surface 120 of the inner space 100. The cave 200 is formed as an unground portion of the rock layer 1 And a method of forming the same.