关键词: 深埋隧道, 高地应力, 岩爆特征, 防治措施, 优化施工

Abstract: It is of great importance to effectively control the dynamic instability and continuous rockburst of the surrounding rock of deepburied tunnel under the influence of high ground stress, ensure the stability of surrounding rock, effective support structure and safety of construction personnel, and pass through the rockburst section with high ground stress smoothly and quickly. Therefore, the rockburst characteristics of Ping′an Tunnel on ChengduLanzhou Railway are summarized, and the rockburst characteristics in different time periods, different tunnel locations, different levels and different tunnel segments are analyzed. Moreever, a comprehensive rockburst prevention and treatment measure combining prevention, control and monitoring is put forward from the aspects of technological method, blasting parameters, support structure and deformation monitoring, which can effectively control the construction risk of rockburst section of deepburied tunnel with high ground stress and realize safe and rapid construction.

Key words: deepburied tunnel, high ground stress, rockburst characteristics, prevention measures, optimized construction