Title:
測定された送り速度から決定される応力レベルによる打撃式削岩の制御方法および制御設備
Document Type and Number:
Japanese Patent JP4116556
Kind Code:
B2
Abstract:
The rock drill apparatus ( 1 ) comprises a rock drill machine ( 6 ) provided with a percussion device ( 4 ), a feed device ( 9 ) and a tool ( 7 ), the tool ( 7 ) end comprising a bit ( 8 ) for breaking rock. The tool ( 7 ) is arranged to transmit impact energy generated by the percussion device ( 4 ) as a compression stress wave to the bit. The feed device ( 9 ) is arranged to thrust the tool ( 7 ) and the bit ( 8 ) against the rock to be drilled, whereby on drilling at least part of the compression stress wave generated by the percussion device ( 4 ) to the tool ( 7 ) reflects from the rock to be drilled back to the tool ( 7 ) as tensile stress, and impact energy of the percussion device ( 4 ) is adjusted on the basis of the level of tensile stress (sigmav) reflecting from the rock.
Inventors:
Keskiniva, Maluk
Application Number:
JP2003536585A
Publication Date:
July 09, 2008
Filing Date:
October 17, 2002
Export Citation:
Assignee:
SANDVIK TAMROCK OY
International Classes:
E21B44/00; E21B7/02
Foreign References:
| US4671366 |
Attorney, Agent or Firm:
Takao Katori