Instability Analysis and Reinforcement Support Technology of Coal-Rock Interbed Roadway in Gaojiazhuang Coal Mine

Figure 3

Changes in strength and stress of surrounding rock after the construction of the roadway. 1: raw rock stress circle; 2: deformation circle after roadway construction; 3: stress circle after roadway construction; 4: stress circle after roadway construction is stable; A: envelope line after roadway construction; B: long-term roadway stability package network.