ROCKBURST ANALYSIS BASED ON DAMAGE CRACK MODEL OF HYPOPLASTICITY
Hypoplastic constitutive model is developed on the basis of nonlinear tensorial functions and without resorting to concepts of elasto-plasticity theory such as yield surface, plastic potential, flow and hardening rules, and decomposition of deformation into clastic and plastic parts. In this paper, based on the hypoplastic model, damage energy release rate is firstly deduced. By virtue of fracture criterion, damage evolution equation is then determined to analyze the propagating of crack in surrounding rock. Throughout this study, it is made clear that the unstable propagation of cracks is caused by the interaction between cracks and that free surface and then thin layers of rock mass are formed as a result of coalescence of cracks. Finally, formation mechanism of rockburst is concluded and the regularity of rockburst is explained quantitatively.
BAO-LIN XIONG XI-LIANG WANG CHUN-JIAO LU
Department of Civil Engineering, Shijiazhuang Railway Institute Shijiazhuang, 050043, P.R.China Department of Architecture and Art Design, Shijiazhuang Railway Institute Shijiazhuang, 050043, P.R.
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
785-788
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）