镐型齿截煤机理研究

基于镐型齿截煤理论不完善的现状，采用力学分析与试验研究相结合的方法，对镐型齿截煤机理进行了研究。在国内首次采用高速摄影的研究手段，对煤体裂纹扩展的动态过程进行了分析。指出煤体在刀具作用下的碎裂，主要是其内部缺陷——原生裂隙在拉、剪应力共同作用下的结果，且截割力与切削深度基本成线性关系。

Study of coal cutting mechanism of point-attack pick

Cutting mechanism of point-attack pick is studied in the thesis by means of combining mechanics analysis with experiments study.High-speed photograph was first adopted in the experiment nationwide.We point out that the disruption of coal with cutting tool acting on,is main caused by it's internal defect-crack,on which both direct stress and shear stress act.And cutting resistance is approximately linear relation with cutting depth.