Research Article
The Assessment and Evolution of Water-Conducting Rules under the Influence of Mining-Induced Stress
Table 1
Permeability classification of rock-soil bodies.
| | Grade of permeability | Standard | Soil type | | Permeability coefficient, K (m/s) | Permeability, q (Lu) |
| | Most impermeable | K ＜ 10−8 | q ＜ 0.1 | Clay | | Little permeable | 10−8 ≤ K ＜ 10−7 | 0.1 ≤ q ＜ 1 | Clay-silt | | Weakly permeable | 10−7 ≤ K ＜ 10−6 | 1 ≤ q ＜ 10 | Silt-fine sand | | Moderately permeable | 10−6 ≤ K ＜ 10−4 | 10 ≤ q ＜ 100 | Sand-sand gravel | | Strongly permeable | 10−4 ≤ K ＜ 10−2 | q ≥ 100 | Sand gravel-gravel | | Very strongly permeable | K ≥ 10−2 | Boulder |
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