Research Article
Theoretical and Numerical Research on V-Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling
Table 9
Technical statistics of V-cut blasting with auxiliary holes.
| | Date | Vertical depth of hole (m) | Cyclic advancement (m) | Blasthole utilizing factor (%) | Specific charge (kg/m3) |
| | 2019.3.18 | 4.7 | 4.29 | 91.4 | 0.882 | | 2019.3.19 | 4.7 | 4.27 | 90.8 | 0.886 | | 2019.3.20 | 4.7 | 4.20 | 89.4 | 0.900 | | 2019.3.21 | 4.7 | 4.25 | 90.4 | 0.891 | | 2019.3.22 | 4.7 | 4.29 | 91.2 | 0.882 | | 2019.3.23 | 4.7 | 4.23 | 90.0 | 0.895 | | 2019.3.24 | 4.7 | 4.26 | 90.6 | 0.886 | | Average | 4.7 | 4.26 | 90.5 | 0.889 |
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