金平水电站地下洞室施工的岩爆预防及处理措施

Rock Burst Prevention in Construction of Underground Cavern at Jinping Hydropower Station and Treatment Measures

岩爆是高地应力区地下洞室开挖过程中因岩体应力释放而导致岩块骤然以爆炸形式从洞室周边飞射出岩块的现象。岩爆往往造成开挖工作面的严重破坏、设备损坏和人员伤亡,已成为岩石地下工程和岩石力学领域的世界性难题。其为高地应力地区影响地下洞室施工安全顺利进行的关键因素。针对金平水电站地下洞室施工,探讨了岩爆的预防和处理措施。

During excavation of underground caverns in high in situ stress area,rock burst occurs due to rock mass stress relief,then rock blocks suddenly burst out from cavern periphery.Rock burst will cause serious failure of excavated work face,equipment damage and loss of life,which is world class challenge in underground rock engineering and rock mechanics field.This is key factor influencing successful and safe construction in underground cavern under high in situ stress area.In this paper,rock burst prevention and treatment measures are discussed for underground cavern construction at Jinping hydropower station.