Analysis of Errors in Terrestrial Laser Scanner to Estimate Joint Roughness Coefficient of Rock Mass using Deep Learning
摘要
Rock fractures exhibit roughness that influences the mechanical and hydraulic properties of the rock mass, which are important to various underground projects. This paper aims to develop a method to estimate the Joint Roughness Coefficient (JRC) of rock fractures using terrestrial laser scanners (TLS) and deep neural network for quick and safe investigation. While TLS offers fast acquisition of 3D point cloud, errors are inevitably contained in the scan data. By analyzing scan data of a granite outcrop, the effect of these errors on JRC measurement is investigated. In addition, a deep neural network is trained to estimate the error-corrected JRC of the scan data. The performance of the developed estimator is evaluated, and its implication is guided as a result.