ABSTRACT
There are many ways to prevent or reduce swelling bottom development working. As a rule, they have significant limitations. Some of them have poor efficiency due to the short period of their validity, due to the dangers related to the demolition work, due to the deformation of frame support during the conduct of such works (A.p. USSR #1506126… 1989). Others are costly to drill holes and install anchors, a significant increase in the laboriousness of tunnel works, limiting the functional properties of excavation due to the lower cavity width as compared with the distance between racks support (Pat. 2007577 Russian Federation… 1994). Therefore, there is a need to create a simple tech way to ensure the sustainability of the excavation adjacent to the lava.
