APPLICATION OF EXTENSIBLE COMPREHENSIVE EVALUATION TO ROCKBURST PREDICTION IN A RELATIVE SHALLOW CHAMBER
Being a kind of usual geological hazard in deep tunnels and chambers, rockburst greatly threatens the safety of constructors and equipments. It is traditionally thought that rockburst only occurs when buried depth reaches 300m. However, rockburst occurs frequently during initial construction in the main-transformed chamber of a hydropower station where the buried depth is less than 200m. According to the lithology and crustal stress obtained in field experiments, this paper uses extensible comprehensive evaluation to predict rockburst in this relative shallow chamber. After analyzing the reasons of rockburst in the project, it is concluded that rockburst can also occur in relative shallow chamber under some conditions. During the evaluation, lithologic parameters are obtained from field rock mechanical experiments and stress indices are gotten from geostress measurement using hollow inclusion method and FEM simulation. Throughout the comparative analysis and field practical verification, it is proved that the results of the evaluation are reliable and have great guiding role for later construction.
HUAI-FENG SUN SHU-CAI LI DAO-HONG QIU LE-WEN ZHANG NING ZHANG
Geotechnical and Structural Engineering Research Center, Shandong University Jinan, 250061, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
777-784
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）