CAJ | 학술논문

节理岩体几何结构非常复杂，研究其渗流特性对于指导含水岩层稳定性分析具有重要价值。应用离散裂隙网络模型DFN方法，基于VC++6.0软件平台，建立了平面渗流分析方法，分析了节理岩体不同几何分布情况下的渗透率张量特征，通过定义渗流定向性系数对岩体渗流的定向性特征进行了定量分析。结果表明：单组节理岩体渗流具有明显的各向异性特征，渗流定向性随着节理角度变化显著；节理随着节理贯通性增加，节理渗透率呈现对数增加趋势；两组节理情况下，各向异性特征随着节理组间夹角变化；两组节理岩体渗流特征研究中，正交分布下，岩体仍存在各向异性，但渗流定向性系数较低；当节理倾角服从正态分布时，随着节理倾角标准差增大，渗透率增加；两组节理夹角不同时，节理渗透主方向倾角随着夹角增大而相应增大，基本沿两组节理夹角方向的角平分线方向。
절리암체궤하결구비상복잡，연구기삼류특성대우지도함수암층은정성분석구유중요개치。응용리산렬극망락모형DFN방법，기우VC++6.0연건평태，건립료평면삼류분석방법，분석료절리암체불동궤하분포정황하적삼투솔장량특정，통과정의삼류정향성계수대암체삼류적정향성특정진행료정량분석。결과표명：단조절리암체삼류구유명현적각향이성특정，삼류정향성수착절리각도변화현저；절리수착절리관통성증가，절리삼투솔정현대수증가추세；량조절리정황하，각향이성특정수착절리조간협각변화；량조절리암체삼류특정연구중，정교분포하，암체잉존재각향이성，단삼류정향성계수교저；당절리경각복종정태분포시，수착절리경각표준차증대，삼투솔증가；량조절리협각불동시，절리삼투주방향경각수착협각증대이상응증대，기본연량조절리협각방향적각평분선방향。
Joint systems in rock masses are geometrically complex; and investigation of the hydraulic properties is important for understanding the hydraulic behavior of jointed rock masses and stability analysis of rock engineering. A discrete fracture network (DFN) model was designed using C++language based on VC++6.0 platform to realize a fracture network for seepage analysis. The permeability coefficients, possibility of equivalent permeability tensors of the jointed rock masses were examined by simulating flow through DFN models of varying joint properties. A directionality coefficient was defined to quantitatively assess the principal flow direction in jointed rock masses. The results show that the permeability coefficients are anisotropic according to permeability tensor analysis for rock masses with only one set of joints. The degree of obliquities of joint plane affects obviously the principal direction of permeability. The permeability coefficients increase logarithmically with the increase of joints connectivity rates. In the scenarios where two sets of joints existed, the anisotropic properties vary with the joints geometrical distribution. The permeability anisotropy in a fracture network with two mutually perpendicular sets of joints still exists; and however, the directionality coefficients are examined smaller. For the dip angles whose probability distribution can be effectively by normal function, the permeability coefficients increase with increasing of the standard deviation. The principal direction of permeability runs similarly along the direction of angle bisector between two sets of joints.