Investigation on the evolution characteristics and transfer mechanism of surrounding rock pressure for a hard-rock tunnel under high geo-stress: case study on the Erlang Mountain Tunnel, China

Similar to the squeezing soft-rock tunnel, the surrounding rock pressure for a deep-buried hard-rock tunnel under high geo-stress also possesses certain long-term evolution characteristics, which have a significant impact on the safety performance of the supporting structures. This paper investigated the evolution characteristics and transfer mechanism of the surrounding rock pressure for a deep-buried hard-rock tunnel through the combinations...