THEORETICAL ANALYSIS AND FLAC3D SIMULATIONS ON ROCK CRACKS PROPAGATION CRITERION UNDER BLASTING LOADING
Considering the fracture mechanics, this paper analyzes the stress intensity factor under blasting loading and initial geostress. The rock cracks propagation criterion is introduced and the method of calculating the propagation zone is obtained. In order to prove its feasibility and rationality, one tailracc tunnel is analyzed by dynamical calculation of FLAC3D. The cracks propagation zone is illustrated. The results show the propagation zone is approximately 90- 100 times of the cylindrical charge, and are good coincidence with the results from the blasting experiments.
NING LIU WEI-SHEN ZHU XIAO-LI XIN
Research Center for Geotechnical and Structural Engineering, 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
531-534
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）