Research Article
Research on Inpit Dumping Height during Tracing Mining Period between Two Adjacent Surface Coal Mines
Table 1
Basic parameters of the inpit dumping height model.
| Serial number | Mining parameters | Symbol | Unit | Parameter values |
| 1 | Mining depth | H | m | 180 | 2 | Bottom working bench length | L | m | 2000 | 3 | Northern end-slope angle | α | ° | 32 | 4 | Stability slope angle of inner dump | β | ° | 20 | 5 | Working slope angle | γ | ° | 10 | 6 | Working slope angle of inner dump | φ | ° | 17 | 7 | Distance between the working bench and the bottom dumping bench | Lz | m | 60 | 8 | Transportation road gradient | i | % | 8 | 9 | Annual advancement in haerwusu surface coal mine | | m | 400 | 10 | Annual advancement in haidaigou surface coal mine | v′ | m | 350 | 11 | Transportation cost of inpit dumping | Cy | Yuan/m4 | 0.0025 | 12 | Secondary stripping cost | CB | Yuan/m3 | 12 |
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