Geomechanical model for Sedimentary Soft Rock based on Surface-based Investigations
JAEA is developing two off-site underground research laboratory (URL) projects in Japan: one in sedimentary rock (Horonobe, Hokkaido) and the other in crystalline rock (Mizunami, Gifu). The Horonobe URL project is a comprehensive research and development project aimed at studying geological disposal in sedimentary formations. This project consists of three phases: surfacebased investigations (Phase I), investigations during excavations (Phase II) and investigations in the underground facilities (Phase III). In Phase I, aerial reconnaissance surveys, ground geophysical surveys, surface and borehole investigations were performed to select the URL location and to understand the geological environment in and around the URL. At present, Phase II has started and the ventilation shaft of the URL has been excavated to about 250-m depth. This paper summarizes development in Phase I of a geomechanical conceptual model and estimation of physical and mechanical parameters for prediction of mechanical behavior of the rock mass in response to excavation of the facility.
Y.Sugita H.Sanada H.Matsui
Japan Atomic Energy Agency, Horonobe, Japan Japan Atomic Energy Agency, Mizunami, Japan
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）