Study on Rock Excavation with Laser

摘要

In order to excavate rock bed without reaction , the C02 laser was utilized. Feasibility of using laser energy to excavate rock was evaluated. Two kinds of rock were subjected to C02 laser beam in preliminary experiment. The cross section of rock samples subjected to C02 laser was observed carefully along the depth from the irradiated surface.1) Sandstone was mostly melted and partly vaporized.2) Granite has many cracks around kerf filled with molten rock.3)The molten part formed the dross. The formation of dross reduced the excavation effectively. Further study was conducted to reduce the effectually of the dross.Laser power, processing rate and beam width on rock surface were taken as parameters to find the condition without forming the dross. Also new method was developed to remove the dross effectively.