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Abstract Based on redistribution of initial rock stress field caused by working face mining, stress concentration, redistribution and stabilization were appeared. In order to analyze distribution characteristics of floor stress, FLAC3D numerical simulation method was adopted. The results showed distribution law of vertical stress along strike and tendency and somewhere under the coal seam floor. On the basis of variation of plastic zone in a depth of floor and along tendency, distribution law of falling zone in goaf floor was obtained as well.
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