1126 工程科学学报，第42卷，第9期 9 90 90 120 60 120-30T 60 120 60 150 30 150 30 150 30 180 180 180 210 330 210 330 210 330 240 300 240 300 240 300 270 270 270 The first ore drawing The second ore drawing The third ore drawing 90 90 120 30 0 120 60 120 60 150 30 150 30 150 30 180 180 180 210 210 30 210 30 240 300 240 300 240 300 270 270 270 The fourth ore drawing The fifth ore drawing The sixth ore drawing 9% 90 90 120 2 60 120 60 120 60 150 30 150 30 150 30 180 180 180 210 330 210 3 30 210 240 300 240 300 240 300 270 270 270 The seventh ore drawing The eighth ore drawing The ninth ore drawing % 90 120 .60 120 120 30 60 150 20 30 150 9 150 30 180 180 180 210 30 210 30 210 30 240 300 240 300 240 300 270 270 270 The tenth ore drawing The eleventh ore drawing The twelfth ore drawing 图9多漏斗放矿过程力链方向演化规律 Fig.9 Evolution law of the force chain direction in the multi-funnel ore drawing process90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The seventh ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The eighth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The ninth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The tenth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The eleventh ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The twelfth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The fourth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The fifth ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The sixth ore drawing The first ore drawing 90 30 20 10 0 0 0 0 0 0 0 0 0 0 0 0 120 150 180 0 30 210 330 60 240 300 270 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The second ore drawing 90 30 20 10 120 150 180 0 30 210 330 60 240 300 270 The third ore drawing 图 9    多漏斗放矿过程力链方向演化规律 Fig.9    Evolution law of the force chain direction in the multi-funnel ore drawing process · 1126 · 工程科学学报，第 42 卷，第 9 期