采煤机工作面截割试验分析

由于当前针对采煤机的有关研究中，缺乏来自工作面现场的截割载荷研究。因而从分析螺旋滚筒主要截割载荷的角度，对具有记忆截割功能的采煤机在人工示教截割试验阶段拾取的截割电流和牵引转矩信号及螺旋滚筒主要截割载荷进行了分析。对采煤机螺旋滚筒截割含有不同煤岩界面煤层时载荷特征地分析表明：采煤机截割力响应信号的均值特征能真实反映截割介质的本质差别；采煤机实际工作过程中，在各典型截割工况下，螺旋滚筒截割力响应信号服从正态分布，且在正常截割工况下，截割力响应信号的方差最小，即截割力响应信号的波动最小；滚筒高度和截割状态持续时间可用于滚筒截割状态的精确识别；截割功率约占总消耗功率的70%。

Test analysis of shearer cutting at coal face

Current studies on shearers are lack of the analysis of cutting loads from the coal working face.The sampling values of cutting current and traction torque signals picked from the shearer with memory-cutting function at its manual teaching phase were analyzed，and the main cutting loads of its spiral drum were also calculated in this paper.The results show that the characteristics of mean cutting force response signals can truly reflect the nature differences of drum cutting media；the cutting force response signals in various typical cutting conditions follow normal distributions，and in the normal cutting condition，the variance of the cutting force response signals is the smallest，which means the fluctuations of the cutting force response signals in a normal cutting condition is the lowest.The drum height and its cutting state duration can be used for the accurate recognition of drum cutting state；and cutting power accounts for approximately 70% of the total power consumption.