Research Article
A Computing Method for Sand Inrush Quantity through a Borehole in Longde Coal Mine
Table 1
Empirical formula and calculation result [
17–
19].
| Formula | Equation | Common value of empirical parameters | (m/s) | Q (m3/h) |
| Chezy formula | | 0.010–0.030 | 5.44–16.32 | 1537–4611 | Hazen–William formula | | 100–140 | 15.40–21.56 | 4352–6093 | Scobey formula | | 0.3–0.6 | 0.48–0.70 | 137–1977 | Actual result | — | — | — | 4400–5400 |
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