破裂岩體中節理幾何參數與水力參數相關性之研究

Relation Between Fractured Geometric Parameters and Hydraulic Parameters in Fractured Rock

陳榮華(Rong-Hwa Chen) ； 李振誥(Cheng-Haw Lee)

《鑛冶：中國鑛冶工程學會會刊》 43卷4期 (1999/12) Pp. 75-87

https://doi.org/10.30069/MM.199912_43(4).0009

摘要

本文旨在探討岩體幾何參數與水力性質之關係，並以蘭嶼地區調查量測之結果說明之。文中首先探討破裂岩體中節理之RQD、孔隙率、內寬與透水係數四者間之相關理論模式，藉由現場調查之節理幾何特性資料，進行統計分析，如節理組數、平均方位、平均間距、頻率等，以獲得節理網路所需之參數。文中並以空間投影方法，將現地之節理網路轉為當量化之三組垂直正交破裂岩體網路，以便進行節理幾何參數與水力參數相關性之研究。最後，蘭嶼現地岩體之水力內寬與透水係數，並將所推估理論模式之參數值與現地試驗值作比較。本研究結果顯示由理論模式估計蘭嶼地區破裂安山岩體之透水係數為10^(-5)至10^(-4)m/sec；由現地岩體雙環試驗結果，龍頭岩附近與虎頭坡附近破裂安山岩體之平均透水係數為2.36 × 10^(-4)m / sec與6.8 × 10^(-5)m/sec，理論值與實驗值兩種結果相接近，而平均水力內寬分別為1.68 × 10^(-4)m與8.28 × 10^(-5)m。

關鍵字

破裂岩體 ； 內寬 ； 透水係數 ； 地下水 ； 岩石品質指標

並列摘要

The purposes of this paper are to investigate the relations between fractured geometric parameters with hydraulic parameters. The theoretical model is built upon the relations of discontinuous rocks of RQD-porosity-aperture-conductivity. The analysis method would be concerned on joint parameters such as sets, orientaion, spacing and frequency. Then as these parameters are known, the joint network of field will be translated to a three orthogonal fractured rocks, based on a stereographic projection. Furthermore, the hydraulic aperture and conductivity in fractured rocks will be estimated using a double-ring infiltrometer, and thus a comparison between theoretical model and field estimate method can be produced. Results show that the hydraulic conductivity is about 10^(-5) ~ 10^(4) m/sec based on theoretical model. On the other hand, using the double-ring infiltrometer test to estimate the average values of hydraulic aperture and conductivity are 1.68 X 10^(-4)m and 2.36 X 10^(-4)m/sec in site 1, and the values of two parameters are 8.28 X 10^(-5)m and 6.8 X 10^(-5)m/sec in site 2.

並列關鍵字

Fractured rock ； Aperture ； Hydraulic conductivity ； Groundwater-RQD