某水电站洞室岩爆的尺寸效应  

Rock Burst's Dimensional Effect on the Tunnels of a Hydropower Station

作　　者：孟陆波[1] 李天斌[1] 周春宏 石豫川[1] 赵宇[1] 

机构地区：[1]成都理工大学,四川成都610059 [2]浙江华东建设工程有限公司,浙江杭州310030

出　　处：《水力发电》2008年第1期29-31,共3页Water Power

基　　金：四川省杰出青年学科带头人培养计划资助项目(03ZQ026-045)

摘　　要：统计某水电站探洞和交通洞现场典型岩爆特征表明,在基本地质条件相似的情况下,岩爆具有随洞室尺寸的增大而增强的趋势,即岩爆具有尺寸效应。根据围岩条件和应力条件建立岩爆分级判别标准,并运用该标准对比分析了整条交通洞和引水隧洞岩爆的尺寸效应,结果表明,在相同桩号处,在其他岩爆发生条件相似的情况下,引水隧洞的岩爆烈度将比交通洞的提高半个等级。By contrasting the representative rock burst＇s characters of a certain hydroelectric power station＇s exploration drift and traffic-tunnel, it indicates that rock burst should be enhanced with enlarging the chamber＇s dimension on the similar basic geological conditions, that＇s to say rock burst has dimensional effect. After that, the paper creates a rock burst grading standards from the wall rock factor and stress factor, and by the grading standards, it analyses the representative rock burst＇s dimensional effect, on the base of above, it contrasts and analyses the stress strength ratio of the whole traffic-tunnel and the diversion-tunnel, the result indicates that the diversion-tunnel＇s rock burst intensity shall increase half gradation than traffic-tunnel＇s rock burst at the same position on the condition of similar rock burst＇s generating factors.

关 键 词：岩爆 烈度 尺寸效应 应力强度比 

分 类 号：TV554[水利工程—水利水电工程]