裂隙岩體三維空間水力結構特性研究

THREE-DIMENSIONAL CHARACTERIZATION OF HYDRO-STRUCTURES OF FRACTURED ROCK MASS

李鳳梅(Feng-Mei Li) ； 柯建仲(Chien-Chung Ke) ； 許世孟(Shih-Meng Hsu) ； 梁嘉宏(Chia-Hung Liang)

《中國土木水利工程學刊》 33卷3期 (2021/05) Pp. 233-243

https://doi.org/10.6652/JoCICHE.202105_33(3).0006

摘要

面對氣候變遷的挑戰，瞭解水資源的蓄存區位及規劃合適的替代水資源方案，為當前政府的重要課題，其中山區地下水扮演關鍵的備援角色，如何準確地評估地下水潛能，瞭解岩層水力結構特性即為首要關鍵。據此，本文應用水位洩降微分理論分析抽水試驗資料，判斷出研究場址周圍與遠端之水文地質邊界（Hydrogeological boundary），並可檢視場址之地下水潛能。另，本文亦應用暫態徑向流模式（Transient radial flow model）與碎形流動維度（Fractal flow dimension）概念，分析封塞水力試驗資料，可瞭解場址水流維度及其裂隙空間分布與滲透性，並完成水力結構（Hydro-structure）概念模型，決定出不同岩層之地下水流動模型，將可提供相關工程實務開發參考。

關鍵字

水文地質邊界 ； 水流維度 ； 裂隙網絡密度

並列摘要

When facing climate change challenges, the appropriate deployment management strategy and storage environment of water resources are the most critical issues to be considered and understood. Among them, groundwater in mountainous areas plays the role of backup water resources. Therefore, the primary key task of effectively and accurately assessing the potential of groundwater resources is to understand the characteristics of hydro-structures of subsurface rock formations. To obtain the three-dimensional information of the hydraulic structure characteristics of each existing site, the existing pumping test data combined with derivative analysis of displacement measurements were used to identify possible hydraulic boundary conditions at the remote area of a drilling borehole. The subsequent results can be utilized to examine the potential of groundwater resources around the borehole. Furthermore, by means of Barker's generalized transient radial flow model and the concept of fractal flow dimension, this study re-analyzed the existing hydraulic test data and obtained the flow dimension of groundwater around a borehole. Results can indirectly elaborate the geometric model of fractured rocks around a borehole and understand the spatial distribution of fractures and the permeability of the fractured rock formation. The above efforts can complete the conceptual model of hydraulic structure and determine the possible groundwater flow model of the existing rock environment. The hydraulic structure characteristic data will be used to provide reference data for future engineering development.

並列關鍵字

hydrogeological boundary ； flow dimension ； fracture network density