| 摘要: |
| 本文采用流体力学方法研究了粗糙裂隙和充填裂隙的水流特性，证明了单一裂隙的有效隙宽小于平均隙宽，且依赖于平均隙宽的均方差。研究了充填裂隙接触面积对流态的影响，论证了一些经验公式的局限性和有效性，对各种单宽流量公式的偏差进行了分析。 |
| 关键词: 岩体裂隙,有效隙宽,平均隙宽,充填裂隙,接触面积 |
| DOI： |
| 分类号:TV5 |
| 基金项目:国家自然科学基金 |
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| Hydraulic conduction coefficient research of rock fractures |
|
Li Dingfang,Yan Jun,Chen Ping
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|
Nanjing Hydraulic Research Institute
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| Abstract: |
| In this paper, The hydraulic conductivity of fracture is studied considering the geometry and topography of the fracture walls and asperity. Under low velocity and some restrictions on the magnitude of the roughness, an ideal model of fracture with wedge shapes and sinusoidal variation roughness is presented. The results show that the effective hydraulic aperture is less than the mean aperture and it depends on the standard deviation of the mean value of the aperture. At last, the effect on the flow pattern caused by the contact area is studied, the deviations of various experiential unit discharge formulas are analyzed, and the simple correction factors which depends only on the contact area. have been presented in this study. |
| Key words: rock fracture, effective width of fracture, mean width of fracture, filled fracture, contact area |
