采矿与安全工程学报Issue(6)：957-962,6.
煤岩材料SHPB实验被动围压数值模拟研究
Numerical analysis of split Hopkinson pressure bar test with passive confined pressure for coal
摘要
Abstract
Coal or rock dynamical disaster poses grave threats to the coal mine safety and high effi-ciency production. So, research on dynamic properties of coal under the complex stress state is signifi-cant. By using the software LS-DYNA, theΦ50 mm split Hopkinson pressure bar(SHPB) tests for coal have been numerically simulated by using the Holmquist-Johnson-Cook (HJC) constitutive model. Based on the finding that the numerical simulation results were similar to the experimental results, pas-sive confined pressure SHPB of coal has been simulated. It is demonstrated that elasticity modulus of sleeve, thickness of sleeve, friction coefficient of contact surface, interval between sleeve and specimen significantly have significant impact on dynamic properties of coal. According to the research results, a new layer to the coal pillar can be added. It can improve shock resistance of coal pillar by designing op-timal parameters of additional layer:elasticity modulus, thickness, friction coefficient of contact surface interval.关键词
煤岩/SHPB实验/被动围压/HJC本构模型Key words
coal/SHPB experiment/passive confined pressure/Holmquist-Johnson-Cook constitutive model分类
矿业与冶金引用本文复制引用
李成武,王金贵,解北京,胡泊,王川..煤岩材料SHPB实验被动围压数值模拟研究[J].采矿与安全工程学报,2014,(6):957-962,6.基金项目
国家自然科学基金项目(51274206) （51274206）
