Experimental study on the prediction of rockburst hazards induced by dynamic structural plane shearing in deeply buried hard rock tunnels

被引:164
作者
Meng, Fanzhen [1 ,2 ]
Zhou, Hui [2 ]
Wang, Zaiquan [1 ]
Zhang, Liming [1 ]
Kong, Liang [1 ]
Li, Shaojun [2 ]
Zhang, Chuanqing [2 ]
机构
[1] Qingdao Univ Technol, Coll Sci, Qingdao, Shandong, Peoples R China
[2] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Stress drop; Fault-slip rockburst; Prediction; Acoustic emission; b-value; B-VALUE; GROUND MOTION; MECHANISMS; PARAMETERS; STRENGTH; BEHAVIOR; STRESS; DAMAGE;
D O I
10.1016/j.ijrmms.2016.04.013
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
To investigate methods for predicting bursts induced by the shear failure of structural planes in the deeply buried hard rock tunnels, shear tests were performed under various normal stresses on completely occlusive granite joints that were created via tension splitting. In these experiments, stress drops resulting from shear off of asperities on the surface of granite rigid structural plane, which can trigger a fault-slip rockburst, were reproduced, and the acoustic emissions (AEs) were monitored during shearing. The AE characteristics were analysed, and a method based on the AE b-value was developed to predict stress drops and the fault-slip rockbursts induced by the stress drops. The b-value continuously decreased before the stress drop and dropped to approximately 0.8 or less at the point of the violent post peak shear stress drop. Moreover, the b-value tended to decrease to a relative minimum during the stick slip period when the energy increased sharply if the energy rate was greater than 10(4), and a lower b-value was associated with a higher rockburst probability and intensity. The b-value generally decreased as the normal stress increased, which increased the risk of rockburst induced by the dynamic shear failure of granite joints. Moreover, the static and dynamic shear failure of the joints was easily distinguished when the b-value was used as a predictor. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:210 / 223
页数:14
相关论文
共 50 条
[1]   Rock mechanical investigations of seismic events in a deep longwall coal mine [J].
Alber, M. ;
Fritschen, R. ;
Bischoff, M. ;
Meier, T. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2009, 46 (02) :408-420
[2]   Use of microseismic source parameters for rockburst hazard assessment [J].
Alcott, JM ;
Kaiser, PK ;
Simser, BP .
PURE AND APPLIED GEOPHYSICS, 1998, 153 (01) :41-65
[3]   Brittle-ductile transition and associated seismicity:: Experimental and numerical studies and relationship with the b value -: art. no. 2044 [J].
Amitrano, D .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2003, 108 (B1)
[4]  
[Anonymous], 1999, P 2 SO AFR ROCK ENG
[5]  
[Anonymous], P 3 CAN US ROCK MECH
[6]  
Bewick RP, 2014, P DEEP MIN 2014 7 IN
[7]  
Blake W., 2003, ROCKB CAS STUD N AM
[8]   Quantitative analysis of seismic velocity tomography in rock burst hazard assessment [J].
Cai, Wu ;
Dou, Linming ;
Gong, Siyuan ;
Li, Zhenlei ;
Yuan, Shasha .
NATURAL HAZARDS, 2015, 75 (03) :2453-2465
[9]   Spatial and temporal evolution of b-values before large earthquakes in Taiwan [J].
Chan, Chung-Han ;
Wu, Yih-Min ;
Tseng, Tai-Lin ;
Lin, Ting-Li ;
Chen, Chien-Chih .
TECTONOPHYSICS, 2012, 532 :215-222
[10]   Assessing damage of reinforced concrete beam using "b-value" analysis of acoustic emission signals [J].
Colombo, IS ;
Main, IG ;
Forde, MC .
JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2003, 15 (03) :280-286