Numerical analysis on coal-breaking process under high pressure water jet  

作　　者：CHEN Jin-hua LIANG Yun-pei CHENG Guo-qiang 

机构地区：[1]College of Natural Resources and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266510, China [2]Chongqing Research Institute, China Coal Research Institute, Chongqing 400037, China

出　　处：《Journal of Coal Science & Engineering(China)》2009年第3期289-294,共6页煤炭学报（英文版）

基　　金：Supported by the National Basic Research Program of China(973 Program)(2005CB221504);the National Natural Science Foundation of China(50534080);the National Science and Technology Supporting Program of China(the 11th Five-Year Program)(2006BAK03B03)

摘　　要：Based on the theory of nonlinear dynamic finite element,the control equation ofcoal and water jet was acquired in the coal breaking process under a water jet.The calculationmodel of coal breaking under a water jet was established;the fluid-structure couplingof water jet and coal was implemented by penalty function and convection calculation.The dynamic process of coal breaking under a water jet was simulated and analyzed bycombining the united fracture criteria of the maximum tensile strain and the maximal shearstrain in the two cases of damage to coal and damage failure to coal.Based on the theory of nonlinear dynamic finite element, the control equation of coal and water jet was acquired in the coal breaking process under a water jet. The calculation model of coal breaking under a water jet was established; the fluid-structure cou- pling of water jet and coal was implemented by penalty function and convection calculation The dynamic process of coal breaking under a water jet was simulated and analyzed by combining the united fracture criteria of the maximum tensile strain and the maximal shear strain in the two cases of damage to coal and damage failure to coal.

关 键 词：numerical analysis coal breaking high pressure water jet fluid-structure coupling DAMAGE DRILL 

分 类 号：O241[理学—计算数学] TP69[理学—数学]