study on coal pillar stress evolution of special thick inclined coal seam based on similar material simulation

To study pillar stress evolution of special thick inclined coal seam mining,combined with Laohutai coal mine special thick coal seam in Fushun mine area,according to 83003 fully mechanized face and 73005 fully-mechanized face construct mechanics model.Using the similar material simulation to monitor coal pillar stress,obtained the law of stress evolution,and based on experimental results layout reasonable measures to control rock burst in the field.The results show that the deeper coal seam is,the larger coal pillar affected by mining,stress concentration factor is on the rise,and the range is from 1.09 to 3.12;coal pillar stress between 73005 fully mechanized face and 83003 fully-mechanized face stress is significantly higher than the coal pillar stress of model boundary;the more the times of coal pillar affected by mining is,the greater the coal pillar stress is;When face advancing,the caving of overlying strata makes stress fully release in the rock,with goaf compacted,the stress is rebounding.By similar material simulation research,to guide face mining,and using coal seam water injection,pressure released holes and strengthen support to control rock burst,which achieve an ideal results.