RESEARCH ON THE ENERGY MECHANISM OF COLLIERY ROADWAY ROCK-BURST
In underground collieries, rock-burst occurs as a result of energy abrupt destabilization, during which elastic strain energy in coal and rock mass after excavating is larger than plastic strain energy due to failure and damage. Current numerical simulations for colliery rock-burst are mostly focused on the degree of stress concentration, not energy the destabilization condition which is the essential nature of rock-burst. Based on energy destabilization, this paper applies finite difference software-FLAC3D to researching roadway rock-burst in colliery Strain energy of linear elastic model and the ideal elastic-plastic model in FLAC3D are analyzed and related energy discriminate for rock-burst is put forth. If residual elastic strain energy of coal and rock body is positive, rock-burst has the possibility to occur. Strain energy formulas of 2 models are presented and corresponding calculation modules are programmed with FISH-an inner programming language in FLAC3D. With these calculation modules, energy distributions of rock and coal mass surrounding the roadway under different conditions are calculated. Results are shown as follows: elastic strain energy accumulated in coal is larger than that in rock under the same condition of excavating depth and excavating scale. Compared with single coal or rock material models, combined model of coal and rock can accumulate more elastic strain energy in roadway sides, which implies a larger bursting danger in the combined model.
HANG LAN QING-XIN QI DE-BING MAO
Department of Coal Mining & Designing, Tiandi Science & Technology Co.Ltd., Beijing, 100013, P.R.Chi China Coal Research Institute, Beijing, 100013, P.R.China Department of Coal Mining & Designing, Tiandi Science & Technology Co.Ltd,.Beijing.100013, 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
705-710
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）