Research Article
Influencing Factors’ Analysis of Disturbance Degree of Key Stratum Based on the Response Surface Method
Table 6
Statistics of KSDD in each mine.
| Number | Name of mine | Mining height M (m) | Buried depth D (m) | Interlayer spacing H (m) | Intermediate stratum | Disturbance degree of key stratum | Lithology | Percentage (%) |
| 1 | Longde | 3.96 | 120 | 80 | Sandstone | 65.97 | 2.823 | Mudstone | 34.03 |
| 2 | Yuhua | 6.87 | 600 | 20 | Siltstone | 33.00 | 2.566 | Mudstone | 2.50 | Fine sandstone | 67.50 |
| 3 | Da’anshan | 2.23 | 500 | 10 | Siltstone | 65.00 | 6.64 | Mudstone | 35.00 |
| 4 | Fangezhuang | 3.16 | 500 | 15 | Siltstone | 35.00 | 4.512 | Fine sandstone | 65.00 |
| 5 | Qianjiaying | 2.3 | 500 | 14 | Carbonaceous mudstone | 19.70 | 3.138 | Siltstone | 80.30 |
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