Study on the pressure behavior law of fully mechanized face with large mining height in Yangchangwan coal mine

摘要

In order to study the pressure behavior of No.120207 fully mechanized working face in Yangchangwan coal mine, the rule of the distribution characteristics of lead abutment pressure and the characteristics of roof weighting were studied through numerical modeling and site observation.The results showed that with the increasing of mining height, the scope of abutment pressure is gradually increased, but the peak point pressure is not increased.Compare to the routine mining height workface, the periodic weighting length is shorter and the dynamic factor is bigger.