岩石剪力破裂面粗糙度及其量測之研究

Roughness Measurements of Rock Shear Fractures

王建力(C. L. Wang) ； 林宏奕(H. I. Lin)

《鑛冶：中國鑛冶工程學會會刊》 44卷2期 (2000/06) Pp. 155-163

https://doi.org/10.30069/MM.200006_44(2).0011

摘要

由於岩體不連續面之粗糙程度可直接或間接地反映出一些岩盤工程相關之重要性質，諸如岩石之剪力強度、岩體之變形性、以及破裂面之水力性質等，若能在現地或在實驗室之內正確地量測岩石破裂面之粗糙度，當有助於岩盤工程之設計與施工。本研究嘗試以機械工業精密量測中所定義之各種表面粗糙度參數計算岩石節解理粗糙係數（JRC）標準剖面之對應數值，整理並歸納JRC與各種表面粗糙度參數之關係。本研究於試驗室製作一模擬之岩石剪力破裂面，並自立發展一套線性差變感應器量測系統進行量測該破裂面之粗糙度並討論其結果。

關鍵字

岩石力學 ； 破裂 ； 粗糙度 ； 量測

並列摘要

The roughness measurements of rock discontinuities can, directly or indirectly, reflect some important rock-engineering-related properties, including the shear strength, deformability, and hydraulic conductivity of the rocks. If the measurements of the roughness of the rock fractures could be successfully carried out in situ or in the laboratory, it would facilitate rock engineers to undertake the design and construction of rock engineering projects. This study reinvestigates the joint roughness coefficients (JRC) originated from Barton and Choubey. Ten parameters of roughness introduced by precision industry were used to calibrate the JRC value. A table was established for the JRC estimation. A granite sample has been prepared for the laboratory investigation. The shear fracture in the rocks was created by a uni-axial compression applied through a shear box. The profiles of the fracture surface were recorded. The corresponding roughness values were also estimated in the study.

並列關鍵字

Rock Mechanics ； Fracture ； Roughness ； Measurement