Abstract: Through the investigation on existence structure of the residual coal area in Wangtian，3 kinds of roof mechanical models for different residual coal area was established.The analysis on the mechanical models shows that the maximum stress of the roof is nearby coal pillars.Numerical simulation on roof and coal pillar of the repeated mining stope across the gob and coal pillar in residual coal area was made with PFPA software.Such technical measures as grouting，filling，and forepoling to support the roof across the gob and coal pillar were initially proposed.

Key words: Residual coal area, Repeated mining stope, Stress of surrounding rock, Numerical simulation