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岩石力学与工程学报 2004年第z2期23卷 4715-4720页

作者：马国伟赵坚张喜虎 Sch. of Civil and Environ. Eng. Nanyang Technol. Univ. Singapore 639798 Singapore Dept. of Civil and Resource Eng. Univ. of Western Australia Crawley WA 6009 Australia Geotech. and Structural Eng. Ctr. Shandong Univ. Jinan 250061 China

A numerical simulation method is proposed to evaluate the underground tunnel safety against explosion in adjacent tunnels. The dynamic constitutive relation used for rock material in the present study consists of a continuum damage model with the damage scalar depending on an equivalent tensile strain, a modified piecewise linear Drucker-Prager strength model allowing for the material strength degradation with damage, and a modified linear equation of state. The numerical model is calibrated by simulation of independent field explosion tests. Parametric study regarding the effect of the adjacent tunnel distance on the dynamic responses of underground tunnel is carried out. Failure zone around the explosion tunnel, and stress, strain and velocity on the adjacent tunnel wall are calculated. safe separation distance between the adjacent tunnels is predicted and compared with empirical result.

关键词： AUTODYN Numerical simulation Rock damage safe separation distance Underground explosion

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Simulations of explosion-induced damage to underground rock chambers

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Journal of Rock Mechanics and Geotechnical Engineering 2011年第1期3卷 19-29页

作者： G.W.Ma1,H.Hao1,F.Wang2 1 School of Civil and Resource Engineering,The University of Western Australia,Crawley,WA 6009,Australia 2 Defense Science and Technology Agency,Singapore,109679,Singapore School of Civil and Resource Engineering The University of Western Australia Crawley WA 6009 Australia Defense Science and Technology Agency Singapore 109679 Singapore

A numerical approach is presented to study the explosion-induced pressure load on an underground rock chamber wall and its resultant damage to the rock *** simulations are carried out by using a modified version of the commercial software *** different criteria,i.e.a peak particle velocity (PPV) criterion,an effective strain (ES) criterion,and a damage criterion,are employed to examine the explosion-induced damaged zones of the underground rock *** results show that the charge chamber geometry,coupling condition and charge configuration affect significantly the dynamic pressure exerted on the rock chamber *** the chamber is *** inaccurate approximation of pressure boundary ignoring the influences of these factors would result in an erroneous prediction of damaged area and damage intensity of the charge *** PPV criterion yields the largest damaged zone while the ES criterion gives the smallest *** presented numerical simulation method is superior in consideration of the chamber geometry,loading density,coupling condition and rock *** predicted damage intensity of rock mass can be categorized quantitatively by an isotropic damage *** separation distance of adjacent chambers for a specific charge weight is also estimated.

关键词： underground explosion rock damage numerical simulation safe separation distance

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