Tóm tắt:

For large mine tunnels or tunnels mine in weak rocks, a zone - friable rocks would appear around it, that is the main reason for the displacement of the rock around the mine tunnel. Based on the empirical results of the survey for displacements on the rock, that be around mine tunnel of coa! mines in Quảng Ninh by means of color indicator stations, the authors propose a method for determining the displacement of the rock around the mine tunnel. The results of this method coincide with the resuits obtained from the experiment. This calculation method can be used to design and select an rational structure for mines in the Quảng Ninh coal mines.