Fig. 18
Dissipative energy cloud diagram of roadway surrounding rock under different mining-excavation positions. This picture shows the dissipated energy cloud map of the surrounding rock at each stage of the roadway, in the whole evolution cycle, the dissipated energy is mainly concentrated in the top and bottom plates of the roadway; the area of plastic dissipated energy accumulation is the main area of damage to the surrounding rock, and the degree of damage to the surrounding rock at the right gang of the roadway increases, while the damage to the surrounding rock at the deep part of the roadway is small, where a large amount of elastic strain energy is accumulated; the range of the dissipated energy accumulation in the roadway is obviously correlated with the distribution of the plastic zone.
