2D-ball simulations on stiffness influences for coal bump  

作　　者：TAN Yun-liang SUN Chun-jiang ZHANG Zhen-yu 

机构地区：[1]Key Lab of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, China [2]Xinwen Mining Cooperation Ltd., Tai＇an 271000, China

出　　处：《Journal of Coal Science & Engineering(China)》2009年第2期161-165,共5页煤炭学报（英文版）

基　　金：Supported by the National Natural Science Fundation of China(50534080,50674063);Taishan Scholar Engineering Construction Fund of Shandong Province of China(J06N04)

摘　　要：Coal bump is a dynamic process,thus it is necessary to reveal the process validly.2D-ball code is an efficient approach developed by the authors based on the basicDEM rationale proposed by Cundall.Numerical simulations show that the coal bump experiencesa process of energy accumulation,sudden release of energy and energy decrease.The stiffness of coal particles has a great influence on the coal bump morphosisand particle velocity.Generally,the larger the stiffness of particles,the longer the shootingoff period and the larger the bump velocity.This is in agreement with the results of laboratoryexperiment and in-situ studies.However,the stiffness of particles has an influence onthe quantity value energy and no influence on the releasing energy pattern of the coalbump.Coal bump is a dynamic process, thus it is necessary to reveal the process validly. 2D-ball code is an efficient approach developed by the authors based on the basic DEM rationale proposed by Cundall. Numerical simulations show that the coal bump experiences a process of energy accumulation, sudden release of energy and energy decrease. The stiffness of coal particles has a great influence on the coal bump morphosis and particle velocity. Generally, the larger the stiffness of particles, the longer the shooting off period and the larger the bump velocity. This is in agreement with the results of laboratory experiment and in-situ studies. However, the stiffness of particles has an influence on the quantity value energy and no influence on the releasing energy pattern of the coal bump.

关 键 词：2D-ball code coal bump stiffness of particle simulation 

分 类 号：TQ536[化学工程—煤化学工程] TP391.41[自动化与计算机技术—计算机应用技术]