Failure mechanism and supporting measures for large deformation of Tertiary deep soft rock

作者：Zhibiao Guo, Jiong Wang, Yuelin Zhang · 发表于：International Journal of Mining Science and Technology · 年份：2015 · DOI：10.1016/j.ijmst.2014.11.002 · 被引用次数：34 · 研究领域：Geomechanics and Mining Engineering、Rock Mechanics and Modeling、Tunneling and Rock Mechanics

The Shenbei mining area in China contains typical soft rock from the Tertiary Period. As mining depths increase, deep soft rock roadways are damaged by large deformations and constantly need to be repaired to meet safety requirements, which is a great security risk. In this study, the characteristics of deformation and failure of typical roadway were analyzed, and the fundamental reason for the roadway deformation was that traditional support methods and materials cannot control the large deformation of deep soft rock. Deep soft rock support technology was developed based on constant resistance energy absorption using constant resistance large deformation bolts. The correlative deformation mechanisms of surrounding rock and bolt were analyzed to understand the principle of constant resistance energy absorption. The new technology works well on-site and provides a new method for the excavation of roadways in Tertiary deep soft rock.