Loads on a cutting head are random processes which are determined by variability of anti cut strenth for coal and rock, uneven of grooving thickness and wearing exent of picks.

• 截割头的载荷是由煤岩抗截强度的多变性、切屑厚度的不均匀性以及截齿磨损程度的变化等诸多因素决定的随机过程.