20 January 2006 Image resolution influence on determination of resin injection rock mass
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Proceedings Volume 6027, ICO20: Optical Information Processing; 602719 (2006) https://doi.org/10.1117/12.667942
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Abstract
In the context of nuclear waste repositories, an important approach to understanding brittle rock mass behavior to integrate new and powerful observational and numerical methods with multi-functional 3-D imaging and visualization techniques. Since 1994, Swedish Nuclear Fuel and Waste Management Company (SKB) have identified the need for a better understanding of radionuclide transport and retention processes in fractured rock. As a cooperation project between Sweden and China, we sampled a number of rock specimens for analyze rock fracture network by optical image technique. The samples are resin injected, in which way; opened fractures can be seen clearly by means of UV (Ultraviolet) light illumination. In the study period, we used different optical focuses to obtain the images from the same samples; we found that Image resolution influences on porosity determination of resin injected rock mass. This paper presents and discusses the six issues based on our research results: (1) Fracture porosity increases as camera focus distance decreases; (2) Porosity increases as illumination increases in resin injected fracture images; (3) To roughly estimate the porosity, the low resolution image can be used; (4) To collect more details of fracture information, the high resolution image is needed; (5) The resolution of image should be determined based on the aim of fracture analysis; (6) To acquire high resolution image, constructing a special illumination (standard) box maybe helpful to avoid light reflection and diffusion.
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Weixing Wang, Eva Hakami, "Image resolution influence on determination of resin injection rock mass", Proc. SPIE 6027, ICO20: Optical Information Processing, 602719 (20 January 2006); doi: 10.1117/12.667942; https://doi.org/10.1117/12.667942
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