主要研究了大功率激光射孔。研究发现, 影响激光射孔的主要工艺参数有激光功率、照射时间和离焦量等。随着激光功率的增加, 孔深先增加后减小, 孔径增大, 破岩效率增大; 随着照射时间的增加, 孔深先增加后稳定, 孔径增大, 破岩效率先增加后减小; 离焦量越大, 小孔直径越大, 孔深越小。在本实验中, 较为合适的离焦量为50 mm, 最大孔深达到75 mm。

This paper studies the high-power laser perforation. Study found that the main process parameters affect laser perforation are laser power, irradiation time, and the defocusing distance and so on. As the laser power increases, the hole depth first increases and then decreases, the hole diameter and rock breaking efficiency increase; With the irradiation time increases, the depth of the hole increases first and then remain stable, the hole diameter increases, rock breaking efficiency increased first and then decreased; with the defocusing distance increasing, the hole diameter increases, while the depth decreases. In this experiment the largest hole depth come to 75 mm.