Results showed that the cutting seamwidth varied with the increase of cutting speed and laser output power.
结果显示在相同的条件下，切缝宽度随切割速度的增加而有一定的变化，随激光功率的增加而显著增加。
2
While the coal seam hardness is definite, the increasing velocity of the width of the plastic zone of pillar decrease with the increase of interfacial bond property between coal seam and roof.
当煤层硬度一定时，随着煤层与顶底板界面粘结性能的提高，煤柱塑性区宽度增长的速度递减；
3
It is necessary to extract molten pool geometrical parameters in real time or to extract back bead width off-line either in seam tracking or in penetration control.