Abstract:
The construction process of gob-side entry retaining in 12209 Zhaojiazhai Mine includes “expanding lane and filling”. Calculated by theoretical analysis, the size of the filling wall is determined as 2.2 m, and FLAC
3D software is used to simulate the displacement of roadway and the distribution of surrounding plastic zone of 2.5 m, 3.0 m, 3.5 m and 4 m. It is determined that the size of 12209 lower lane is 3.5 m. Four kinds of support schemes after road expansion are proposed, and the “anchor + anchor cable + hydraulic lifting shed” is determined as the best solution, and successfully applied on site.