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...
出处
《采矿与安全工程学报》
EI
北大核心
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)
关键词
采动岩体
等效连续介质
流固耦合
overburden rock stratum
equivalent continuous medium
fluid-solid coupling
