Research Article
Trajectory Analysis and Risk Evaluation of Dangerous Rock Mass Instability of an Overhang Slope, Southwest of China
Table 1
Main joint developed in the dangerous rock mass.
| | Joint | Attitude | Frequency (bar/m) | Strike extension length (m) | Tendency extension length (m) | | Dangerous rock mass | Code | Dip | Dip angle |
| | W1 | J1 | N45°E | 89° | 1/4∼5 | 18∼20 | 5∼6 | | J2 | S80°E | 86° | 1/18∼20 | 4∼5 | 15∼20 |
| | W2 | J1 | N80°E | 89° | 1/8∼10 | 10 | 10∼14 | | J2 | S10°E | 71° | 1/23 | 8 | 20∼23 |
| | W3 | J1 | N45°E | 80° | 1/7∼8 | 20 | 20∼25 | | J2 | S70°E | 85° | 1/10 | 7∼8 | 15∼20 |
| | W4 | J1 | N50°E | 87° | 1/5∼8 | 5∼8 | 10∼15 | | J2 | S80°E | 86° | 3/20 | 6∼8 | 14∼16 |
| | W5 | J1 | N35°E | 83° | 1/6∼8 | 20∼25 | 18∼20 | | J2 | S35°E | 72° | 1/20∼25 | 6∼8 | 10∼15 |
| | W6 | J1 | N70°E | 74° | 1/5∼6 | 8∼10 | 10∼15 | | J2 | N10°W | 56° | 3∼30 | 6∼8 | 14∼16 |
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