3D FEM ANALYSIS OF THE INFLUENCE OF BENCH HEIGHT ON OPEN-PIT MINES BENCH BLASTING
Zhang Fengpeng1， Jin Xiaoyuan2， Feng Xiating3
(1Dept. of Mechanics，School of Science，Northeastern University， Shenyang 110004 China) (2Nanfen Open-pit Mine of Benxi Iron-steel Company， Benxi 117014 China) (3Institute of Rock and Soil Mechanics，The Chinese Academy of Sciences，Wuhan 430071 China)
Abstract：The rock displacements and energy distribution at different bench hights in open-pit mine bench blasting were studied by 3D FEM. The problems that may appear in bench blasting were discussed. The results indicated that if the bench height is increased properly，the percent of large-scale stones may be decreased. The piles of blasted rock blocks large in size are intensively lowered in number and loading becomes easy，so the efficiency of mining equipment can be advanced. But the fact that sometimes toe rock may appear should be noted.
张凤鹏1 金校元2 冯夏庭3. 台阶高度对露天矿爆破效果影响的三维有限元分析*[J]. 岩石力学与工程学报, 2002, 21(12): 1835-1838.
Zhang Fengpeng1， Jin Xiaoyuan2， Feng Xiating3. 3D FEM ANALYSIS OF THE INFLUENCE OF BENCH HEIGHT ON OPEN-PIT MINES BENCH BLASTING. , 2002, 21(12): 1835-1838.
2002, Vol. 21 
