Table 1 Structural characteristics of typical high-steep mining slopes.
Typical high-steep mining slope | Slope characteristics | Characteristics of goaf | |||||
|---|---|---|---|---|---|---|---|
The main lithology of overlying coal seam | Slope height | Gradient | Dip angle of rock stratum | Number of goaf layers | Average thickness of goaf | Width of goaf along dip direction H | |
— | (m) | (°) | (°) | — | (m) | (m) | |
Pusa landslide | Limestone, sandstone, siltstone | 140–200 | Top 65–85, Bottom 4–15 | 7 | 3 | 2.2 | 100–300 |
Jianshanying deformation-body | Siltstone, argillaceous siltstone | 120–200 | Top 55–63, Bottom 6–22 | 15 | 6 | 2.0 | 183.5 |
Dayantou deformation-body | Limestone, siltstone | 100–150 | Top 30–77, Bottom 5–15 | 8 | 2 | 2.0 | 100–400 |
Dajingjiao deformation-body | Limestone, argillaceous siltstone, siltstone | 160–380 | Top 35–87, Bottom 7–21 | 12 | 2 | 4.74 | 180–220 |
Yingshanhong deformation-body | Muddy siltstone, siltstone | 300–320 | Top 40–70, Bottom 5–25 | 8 | 2 | 2.42 | 181–227 |
