Research Article
Evaluation and Application of Surrounding Rock Stability Based on the Improved Weighting Multidimensional Cloud Model
Table 1
The evaluation index of surrounding rock quality stability and the range of grading values.
| | Level | Uniaxial compressive strength UCS (MPa) | Volume joint coefficient Jv (m3) | Integrity coefficient Kv | Fracture water pressure P (MPa) | Rock mass quality index BQ (MPa) |
| | I | >60 | <3 | >0.75 | 0.1–0.2 | >550 | | II | 60–30 | 3–10 | 0.75–0.55 | 0.2–0.3 | 550–451 | | III | 30–15 | 10–20 | 0.55–0.35 | 0.4–0.5 | 450–351 | | IV | 15–5 | 20–3 | 0.35–0.15 | 0.7–0.9 | 350–251 | | V | ≤5 | ≥35 | ≤0.15 | 1.0 | ≤250 |
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