NUMERICAL PROCEDURE FOR MODELLING DYNAMIC FRACTURE OF ROCK BY BLASTING
A generic nonlinear and dynamic finite element modelling technique is implemented to simulate rock fragmentation by blasting. The element elimination method, together with a brittle failure material model, is used as a means to simulate the initiation and growth of fractures in the rock under the effect of a blast-induced dynamic pressure pulse. The blasthole pressure profile after blasting is described using an equation of state, incorporating parameters relating volume, energy and pressure of detonation. Blasting a single borehole in an unbounded rock medium and in a rock mass with one free surface is firstly modelled and compared with the published literatures to calibrate the developed modelling procedure. The method is then applied to investigate simultaneous blasting and consecutive blasting with various detonation delays, in order to improve blast efficiency.
H.Y.LIU D.J.WILLIAMS D.M.PEDROSO WEI-MIN LIANG
Golder Geomechanics Centre, The University of Queensland, St Lucia QLD 4072, Australia School of Civil Engineering, Henan Polytechic University, Jiaozuo City Henan Province, 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
1551-1560
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）