截齿截割煤体变形破坏过程模拟试验  

Simulation experimental on the deformation and destruction course of coal body under the function of pick cutting

作　　者：王春华[1] 丁仁政[1] 李贵轩[1] 郑连宏[1] 

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《煤炭学报》2006年第1期121-124,共4页Journal of China Coal Society

基　　金：辽宁省教育厅项目(20081219)

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.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.

关 键 词：截齿 煤体变形 破坏过程 三向力 

分 类 号：TD421.54[矿业工程—矿山机电]