摘要
为了研究基于地表裂隙特征的三维岩体等效渗透率预测方法,建立了不同裂隙特征下三维裂隙岩体几何模型,分析了裂隙几何特征、基质渗透率与二维切面等效渗透率与岩体等效渗透率的内在联系,发现二维切面等效渗透率整体小于三维岩体等效渗透率,且三维岩体等效渗透率与裂隙长度、密度、基质渗透率呈线性关系。量化了裂隙几何参数及基质渗透系数对三维模型等效渗透率的影响,并通过回归分析建立了基于三维岩体裂隙长度、密度、基质渗透率与二维切面等效渗透率预测三维等效渗透率表达式,预测效果较好。
In order to predict the equivalent permeability of 3D fractured porous media based on the geometrical characteristics of surface fractures,a geometric model of 3D fractured porous media with different fracture characteristics was established.The effects of fracture geometric parameters and matrix permeability coefficients on the equivalent permeability of the 3D model were quantified.It is found that the 2 D equivalent permeability is smaller than the 3D equivalent permeability as a whole,and the 3D equivalent permeability has a linear relationship with the fracture length,density,and matrix permeability.A 3D equivalent permeability prediction formula based on 3D rock mass fracture length,density,matrix permeability and 2 D equivalent permeability is obtained through regression analysis,and prediction effect is favorable.
作者
郭忠华
GUO Zhong-hua(School of Mining Engineering,Lvliang University,Lvliang 033000,China)
出处
《煤炭工程》
北大核心
2021年第5期156-161,共6页
Coal Engineering
基金
山西省“1331工程”煤矿机械装备故障诊断与健康管理技术重点创新团队(TD201812)
吕梁市人才引进项目(RC2020-115)。
关键词
裂隙岩体
裂隙几何特征
预测模型
二维切面
渗透率
fractured porous media
fracture geometry
predictive model
2D cut plane
permeability
