| 围岩级别 | 检测长度(米) | 缺陷长度(米) | 脱空缺陷率 | |||||
| 拱顶 | 左拱腰 | 右拱腰 | 左边墙 | 右边墙 | 合计 | |||
| II | 204 | 14 | 10.5 | 20 | 7.5 | 5 | 57 | 5.6% |
| III | 2548 | 242.5 | 125.5 | 131 | 111.5 | 98.5 | 709 | 5.6% |
| IV | 1085 | 73 | 32 | 50.5 | 19.5 | 23.5 | 198.5 | 3.7% |
| V | 547 | 24.5 | 10.5 | 15.5 | 3 | 5.5 | 59 | 2.2% |
| 合计 | 4384 | 354 | 178.5 | 217 | 141.5 | 132.5 | 1023.5 | 4.7% |
| 脱空缺陷率 | 8.1% | 4.1% | 4.9% | 3.2% | 3.0% | 4.7% |
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