Research Article
Linkage Analysis between Solid-Fluid Coupling and the Strength Reduction Method for Karst Cave Water Inrush in Mines
Table 3
Safety thickness of water-proof rock pillar setting in the Maokou limestone for the Qiyi coal mine.
| | Kars water pressure (MPa) | Blasthole depth h1 (m) | Blasting disturbance depth h2 (m) | Calculation safety thickness of rock pillar h3 (m) | Safety thickness of water-proof rock pillar setting (H/m) |
| | 1.0 | 2.5 | 1.5 | 5.18 | 9.18 | | 2.0 | 2.5 | 1.5 | 5.73 | 9.73 | | 3.0 | 2.5 | 1.5 | 6.89 | 10.89 | | 4.0 | 2.5 | 1.5 | 7.98 | 11.98 | | 5.0 | 2.5 | 1.5 | 7.98 | 13.32 |
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