摘要
锦屏电站辅引3#隧洞埋深超过2 200m,地应力极高,属于强岩爆洞段。施工中采用微震监测方法进行岩爆预测,结合喷洒高压水和岩体深部注水技术、光面爆破及应力解除爆破技术和及时施作锚杆、喷砼等支护措施,大大降低岩爆发生概率和产生严重后果的风险,顺利完成隧洞的开挖施工。
The embedded depth of the 3# auxiliary tunnel of the Jinping Power Station is more than 2,200m,with very high in-situ stress.The tunnel is located in an area of strong rock burst.The microseismic monitoring method of rock burst is used for the prediction of rock burst in the process of construction,with the techniques of spraying high-pressure water and injecting water deep into the body of rocks,smooth-face blasting,stress-relieving blasting and timely providing anchor bolts,shotcreting supporting concrete,etc.adopted in collaboration.The above-mentioned techniques and measures help greatly reduce the probability of rock burst and the risks of serious consequences of rock burst,and ensure the successful completion of the excavation of the tunnel.
出处
《国防交通工程与技术》
2012年第2期55-58,共4页
Traffic Engineering and Technology for National Defence
关键词
岩爆
隧洞
光面爆破
支护
应力解除爆破
微震监测
rock burst
tunnel
smooth-faced blasting
support
stress-relieving blasting procedure
microseismic monitoring
