Research Article
Analysis and Testing of Load Characteristics for Rotary-Percussive Drilling of Lunar Rock Simulant with a Lunar Regolith Coring Bit
Table 2
Characteristic parameters in the rotary-percussive drilling load prediction model for lunar rock simulant.
| Rock material | Marble | Cohesion | 24.2 MPa | Inner friction angle | 41.8° | Indentation hardness | 1080 MPa | Friction angle between rock fragments and parent rock | 32.2° | Angle between dense core and cut fracture | 60° | Contact rigidity between hammer and tool post | 20 kN/mm | Contact rigidity between cutting blade and rock | 21 kN/mm |
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