Research Article
Grouting Reinforcement of Large Building Foundation over Old Gob Areas: A Case Study in Huaibei Mining Area, China
Table 2
Observation results of exploration borehole based on the TV imaging test.
| Borehole no. | Observation results using the borehole TV imaging test |
| K1 | Fractures developed at 78.0 m depth; rock collapsed from 92.3 to 97.3 m | K2 | Fractures developed from 88 to 97 m; rock collapsed from 97 to 99 m | K3 | Fractures developed; rock broke from 90.2 to 98.2 m and collapsed from 98.2 to 102.2 m | K5 | Fractures developed; rock broke from 83.8 to 93.6 m and collapsed from 93.6 to 96 m | K6 | Fractures developed; rock broke from 89.1 to 98.6 m and collapsed from 98.6 to 104.5 m | K7 | Rock seriously broke; the hole wall collapsed at 102 m depth |
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