An experimental investigation of seepage characteristics in porous rocks with a single fracture is presented. A seepage system was developed and assembled in the laboratory using two experimental setups. Tests were conducted to quantify the effects of influent pattern, fracture aperture (B), coefficient of permeability of the porous medium (k), hydraulic gradient (J), and water temperature (T) on the seepage characteristics of a porous concrete matrix with a fracture; the porous concrete, with controlled characteristics, was designed to simulate porous rock. The mechanisms of seepage exchange between the porous media and the fracture are discussed, and a new formula for describing the seepage mechanism in a porous rock with a single fracture is proposed. The results showed that B, k, and influent pattern had significant effects on the seepage between the fracture and the porous concrete. The amount of effluent exiting the fracture was greater than that exiting the porous concrete blocks. The proposed model indicated that when B was less than 3.0 mm, the variation in fracture aperture had a significant influence on the effluent from the fracture, while its influence was relatively small when B was greater than 3.0 mm. When k was less than 1.0 cm/s and B increased to 4.8 mm, seepage exited only via the fracture. The proposed mathematical model can be used to effectively estimate the seepage through porous rocks with a fracture.

提出了具有单个裂缝的多孔岩石的渗透特性的实验研究。使用两个实验装置开发并组装了一个渗水系统。进行测试以量化进水方式，裂缝孔径（B），多孔介质的渗透系数（k），水力梯度（J）和水温（T）具有裂缝的多孔混凝土基体的渗透特性；设计具有可控特性的多孔混凝土来模拟多孔岩石。讨论了多孔介质与裂缝之间渗流交换的机理，提出了描述单一裂缝的多孔岩石渗流机理的新公式。结果表明，B，k和进水方式对裂缝与多孔混凝土之间的渗流有显着影响。离开裂缝的流出量大于离开多孔混凝土砌块的流出量。提出的模型表明当B当B小于3.0mm时，裂缝孔径的变化对裂缝流出物有显着影响，而当B大于3.0mm时，其影响相对较小。当k小于1.0 cm / s且B增加至4.8 mm时，渗漏仅通过裂缝退出。所提出的数学模型可用于有效地估计具有裂缝的多孔岩的渗流。