The method of prediction of roof collapse hidden trouble in the roadway of No.2 in Anjialing

Abstract The thickness and strength of strata composing roof stratum will change a lot because of the change of coal forming environments and long time geological evolution. Only knowing these changes exactly, we can get the right design and prevent roof collapse. We can get the thickness, relative position and location of cracks and roof separation of strata with the changing of length of roadway at any time, and design the roof of roadway dynamically according to the lithology and combination changes of roof. In accordance with these, we can ensure not only the economic, but also safety in production.