【摘要】 在自制的截割试验台上进行截齿截割煤体的模拟试验,对截割过程三向力进行在线监测,并对截割过程进行高速摄影,测量了截割物的粒度组成,并对能耗进行测试.试验结果表明:相同截深时锥形截齿截割力比扁型截齿截割力大;截齿截入煤体,在扁型截齿凸脊及锥形截齿齿尖与煤体接触处出现裂纹,随截齿截割前行,裂纹迅速扩展,裂纹扩展方向与煤体的层理、节理有关.更多还原

【Abstract】 The simulation experiment of pick cutting course was carried on the self-made cutting laboratory bench.The three direction forces were monitored and the high-speed photography method was adopted in coal cutting course.The composition of grain size of cutting things was measured,the energy consumption was tested.Results showed that: in the same cutting depth,the force employed on the point-attack pick is bigger than that on the knife tooth;when the pick cuts into the coal body,the crackles appear on the contact position between coal body and point-attack pick top or knife tooth back.With the heading of pick,the crackles expand quickly,the expanding direction is relevant to the bedding and joint of coal body.更多还原