Study on Rockburst Nucleation Process of Deep-Buried Tunnels Based on Microseismic Monitoring
Table 3
On-site records of rockburst within the tunnel section of #3K9 + 770–K9 + 607.
Rockburst time
Rockburst location
Failure modes
Rockburst ranking
2.11 03:30
#3K9 + 637–K9 + 675
Splitting, stripping of massive spall, and ejection of wedged stone, with local collapse before rockburst
Strong
2.13 18:11
#3K9 + 651-K9 + 652
Stripping scattered fragments
Slight
2.16 21:57
#3K9 + 623
marble and class III surrounding rocks. Splitting, spalling, and ejection of massive wedged stone and V-shaped crater. With a loud noise and local collapse and slight rockburst before rockburst
Intermediate
2.16 22:00
#3K9 + 628–K9 + 633
Strong
2.16 23:40
#3K9 + 628–K9 + 635
Strong
2.18 14:50
#3K9 + 627
Splitting, spalling, and scattered fragments
Intermediate
2.18 19:10
#3K9 + 626
Intermediate
2.19 15:42
#3K9 + 621–K9 + 626
Splitting, spalling, ejection of massive wedged stone, and V-shaped and pot-shaped cratering
Strong
2.21 5:45
#3K9 + 607–K9 + 626, north
Splitting, spalling, and ejection of substantial wedged stone, with a loud noise and multiple collapse at tunnel working face rear
