基于SPH方法的非均质煤层瓦斯渗流模拟（英文）  

SPH Method for Gas Seepage Simulation in Heterogeneous Coal Seam

作　　者：程国强 赵芳 明德志 谭云亮 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2017年第6期52-59,89,共9页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51274133,51474137);瓦斯灾害监控与应急技术国家重点实验室开放课题(2012CQCCTEG04KF01)

摘　　要：基于煤层瓦斯渗流方程,通过虚粒子法处理边界条件,提出了一种对非均质煤层瓦斯瞬态渗流进行模拟的光滑粒子流体动力学(smoothed particle hydrodynamics,SPH)方法。煤层存在三个典型的非均质性:(a)沿煤层走向的非均质性,(b)Weibull随机分布的非均质性,(c)是(a)和(b)两种情况都存在的非均质性。结果表明:通过SPH方法得到的数值模拟解与解析解一致,三种非均质煤层都会导致瓦斯渗流的非线性行为。而瓦斯流动的非线性程度与煤层的非均质性参数m和n有关。该数值模拟提供了一种揭示煤层中瓦斯渗流和瓦斯灾害非线性行为机理的有效方法。Based on gas seepage equations,a smoothed particle hydrodynamics（SPH）method was proposed by dealing with boundary conditions through virtual particle for the purpose of gas transient seepage simulation in heterogeneous coal seam.Three typical heterogeneous conditions were considered,namely,（a）heterogeneity along coal seam strike,（b）heterogeneity of Weibull random distribution,and（c）heterogeneity of integration of both（a）and（b）.The results show that the numerical solution obtained by the SPH method is consistent with the analytical solution and that all the three kinds of heterogeneous coal seam can result in the nonlinear behavior of gas flow.The nonlinearity degree of gas flow is correlated to mand n,the two heterogeneity parameters of coal seam.The simulations provide an effective approach for revealing the mechanisms of the nonlinear behavior of gas seepage and gas disasters in coal seam.

关 键 词：光滑粒子流体动力学 瓦斯 非均质 虚粒子 非线性 

分 类 号：TD712[矿业工程—矿井通风与安全]