Tool for drilling in loose rock is arranged on cutting wheels of tunnel boring apparatus, bore crowns of earth drilling apparatus or comparable tool holders or is integral component part of them

摘要

For loose rock drilling, the tool is arranged on cutting wheels of tunnel boring apparatus, bore crowns of earth drilling apparatus or similar tool holders or can be an integral component part of them. At least one tool surface (1) is so inclined at an angle to the movement direction of the tool and the drilling sole (2) that through the movement force of the tool ground material is collected and compressed in the angle between the tool surface and the drilling sole. The ground body (3) thus produced is at least partly normally moved and pressed against the drilling sole is broken apart and ground material is loosened from it. The drill-side tool surface (4) is resistant to abrasion.