STUDY OF FAILURE MODES AND MECHANISMS OF ROCK BURST IN QIREHATAER DIVERSION TUNNEL

Failure modes of rock mass isdetermined by the rock mass structureswhich influence the characteristics of the rock mass. Based on the observations for rock burst in Qirehataerdivisiontunnel, this paper proposes a concept of rock-burst burst-body which is used to describe thecritical state of failure for textured rock mass. Rock-burst burst-body isinitiated, evolved and controlled by the micro structuresof rock mass, the geostress features and the engineering layout, et al.Moreover, the forming process, failure modes and the mechanisms of rock-burst burst-body are exploredby studying the features of rock burst in different place of Qirehataer diversion tunnel. The concept and study of rock-burst burst-bodypresented in this paper will be helpful to further study of rock burst.