Accuracy and applicability of microseismic #br#
monitoring of rock burst in TBM construction
Du Lijie1 Wang Jiaxing1 Hong Kairong2 Huang Junge2 Li Weiwei3 Wang Qi2
1. Shijazhuang Tiedao University, Shijiazhuang 050043, China； 2. China Railway Tunnel Bureau Group Co. , Ltd. , Guangzhou 511457, China；
3.China Water Resources and Hydropower Third Engineering Bureau Co. , Ltd. , Xi′an 710024, China
Abstract：Based on the Xinjiang ABH project and the Shaanxi Yinhanjiwei project, carried out on-site verification and analysis of the level and location of rockburst microseismic monitoring and prediction, and divided the rockburst into three grades of Ⅰ, Ⅱ and Ⅲ according to the risk level. The results show that the accuracy of rockburst microseismic monitoring and prediction increases with the increase of the risk level of rockburst, and it can basically achieve accurate positioning for rockbursts of grades I and II; the accuracy rate of grade I rock burst prediction reached about 80.0%, the accuracy of Grade II rockburst predictions was around 55.0%, the grade III rockburst prediction level and positioning accuracy were relatively low. Comprehensively considering the accuracy of rockburst prediction and the factors of construction safety, advance rate and prevention measures, it is recommended that when there is grade I and grade II rockburst risk, microseismic monitoring should be adopted to ensure construction safety.
杜立杰 王佳兴 洪开荣 黄俊阁 李伟伟 王琪. TBM施工岩爆微震监测的准确率及适用性研究[J]. 土木工程学报, 2020, 53(S1): 278-285.
Du Lijie Wang Jiaxing Hong Kairong Huang Junge Li Weiwei Wang Qi. Accuracy and applicability of microseismic #br#
monitoring of rock burst in TBM construction. 土木工程学报, 2020, 53(S1): 278-285.
