Research Article
Research on the Hard-Rock Breaking Mechanism of Hydraulic Drilling Impact Tunneling
Table 1
Main parameters of hydraulic hammer with large impact energy.
| | Parameter name | Value |
| | Impact energy | 7500 J | | Piston weight of hammer | 200 kg | | Rod diameter | 150 mm | | Piston energy transfer efficiency | 98% | | Elastic modulus of rod material | Pa | | Density of rod material | 7800 kg⋅m−3 | | Impact frequency | 10 Hz | | Rod weight | 200 kg | | Rod length | 1200 mm | | Rod tip diameter | 20 mm | | Rod tip length | 200 mm | | Poisson’s ratio of rod material | 0.3 |
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