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Title: |
Numerical Simulation Analysis of Stress and Displacement Field Variation of Chamber Group Disturbed by Excavation |
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Source: |
International Mining Forum (IMF 2010 E-BOOK)
(pp 133-137)
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Author(s): |
Bingwen Zhao, JIZHONG ENERGY GROUP CO., LTD., Xingtai , China
Feng Luo, College of Resource, Hebei University of Engineering, Handan, China
Bensheng Yang, College of Resource, Hebei University of Engineering, Handan, China
Yanguo Qiao, College of Resource, Hebei University of Engineering, Handan, China |
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Abstract: |
Based on the actual excavation conditions of the large deformation chamber group in XianDeWangcoal mine, through the FLAC3D numerical simulation software, the changing trends of vertical stress ? z ,horizontal stress? x and the shear stress ? xz have been analyzed by all steps; also concludes that besides thestress concentration zone, the deflection trend of contour in the compressive stress heightening zone is “whenthey are near, be away; when they are away, be together”, that is, as to the horizontal stress and vertical stress,because of the disturbance influence of the lower roadway, the contour of the wall near the upper roadway deflectsto the side which is away from the upper roadway and the contour of the wall which is away from theupper roadway deflects to the side which is near the upper roadway; finally concludes that the surroundingrock of the chamber has “displacement tendency” influenced by excavation disturbance, that is, the chambersand roadways in the chamber group are influenced by each other and finally the displacement direction of surroundingrock will move towards the direction of the vector sum of “the main moving direction” and “the disturbingmoving direction”. Due to the excavation disturbance, the magnitude of the displacement will be influencedby the factors of the relative distance between the disturbing chamber and the geometric size of them.
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