Table 2 The designed parameters of the open-off cuts in the similarity model.
The open-off cut | Top coal thickness in-situ /m | Top coal thickness in the model /mm | Excavation depth of the floor in the model /mm |
|---|---|---|---|
1 | 3.0 | 60 | 18.8 |
2 | 3.5 | 70 | 28.8 |
3 | 4.0 | 80 | 38.8 |
The open-off cut | Top coal thickness in-situ /m | Top coal thickness in the model /mm | Excavation depth of the floor in the model /mm |
|---|---|---|---|
1 | 3.0 | 60 | 18.8 |
2 | 3.5 | 70 | 28.8 |
3 | 4.0 | 80 | 38.8 |
