基于FLAC^(3D)的采动岩体等效连续介质流固耦合模型及应用  

Fluid-Solid Coupling Model of Equivalent Continuous Medium in Overburden Rock Based on FLAC^(3D) and Its Application

作　　者：白国良[1] 

机构地区：[1]煤炭科学研究总院唐山研究院,河北唐山063012

出　　处：《采矿与安全工程学报》2010年第1期106-110,共5页Journal of Mining & Safety Engineering

基　　金：国家"十一五"科技支撑计划重点项目(2006BAC09B01);国家自然科学基金项目(50574048);天地科技公司发展基金项目(TZ-JJ-09-TS-2)

摘　　要：基于采动岩体渗流规律研究的重要性,利用立方定律推导了以应变为参数的采动岩体等效渗透系数,建立了基于FLAC3D的采动岩体等效连续介质流固耦合数学模型,利用FISH语言实现了的等效连续介质数学模型的计算.研究结果表明,煤层开采初始阶段岩体渗透性增加区域在底板呈"W"形分布,在顶板岩体渗透性增加区域呈"M"形分布;当含水层渗透性增加区与下方顶板渗透性增加区相交时,形成导水裂隙;伴随着煤层开挖,含水层内孔隙压力发生周期性变化,当透水事故发生时达最大值并迅速降低;以应变为系数参数的等效渗透能够较好地描述采动岩体的渗流规律.Due to the importance studying the seepage law of overburden rocks,an equivalent permeability coefficient for overburden rock is deduced using the cubic law,in which the strain is considered as a parameter.Based on FLAC3D,an equivalent continuous medium numerical model in overburden rock is established considering the fluid-solid coupling effect and the program with FISH language is used to achieve the calculation of equivalent continuous medium numerical model.The results indicate that the increasing perme...

关 键 词：采动岩体 等效连续介质 流固耦合 

分 类 号：TD315[矿业工程—矿井建设]