2D area and 3D volume estimation for rock fractures of Joint fracture of rock mass in tunnel by using ultraviolet images(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年05期
- Page:
- 213-220
- Research Field:
- 交通工程
- Publishing date:
Info
- Title:
- 2D area and 3D volume estimation for rock fractures of Joint fracture of rock mass in tunnel by using ultraviolet images
- Author(s):
- Gao Ting; WANG Weixing; WANG Fengping; LIU Wei; ZHANG Guangnan
-
- Keywords:
- traffic information and control engineering; joint fracture; rock porosity; ultraviolet (UV); image processing
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to provide decision supports for the safety and maintenance of the tunnel construction, a quantitative measurement of the degree of fracture development in the rock mass in a tunnel construction section, the joint fractures of the rock mass were quantized. The construction sample based on UV images was used in combination with the computer image processing technology. Epoxy resin liquid was poure in joint fracture samples from the rock mass， and made into a slice of fixed thickness (18 mm). The characteristic model of the rock joint fracture was then established, and the best matching characteristic search method was used to automatically determine the joint fissure. UV rays were then used to irradiate the slices and the UV images of the fracture on the rock mass were obtained. Finally, image processing technique was used on the sample crack images, thus generating the accurate estimation of the twodimensional area and threedimensional volume of the joint fracture in the rock mass samples. Through sampling experiments on 19 rock samples (more than 100 ultraviolet and visible images each), the accuracy and facticity of the algorithm was determined by analyzing the data. The results show that this method can be used to calculate and estimate the twodimensional area and threedimensional volume of joints fractures in rock samples through density and porosity calculation. This method can be applied to the detection and measurement of joints and fissures in rock masses on the construction surfaces of various highway and railway tunnels. It is also helpful for engineers to select a safe and reasonable construction scheme to ensure the smooth and safe implementation of bridge, tunnel, and road construction. 9 figs, 25 refs.
Last Update: 2018-10-23