Abstract: In allusion to the problem of support–surrounding rock accidents when No.1523 fully mechanized face with large inclination advanced to the island district, we analyzed the cause of the accident. The relative relationship between roof fall and rib spalling and support parameters was studied by spot testing and regression analysis. Then the synthetical control technology including fault diagnose, device for anti-falling and anti-slipping, stability control indices, equipment operation process and so on was put forward. Result shows that the frequency of roof fall height over 0.40 m decreased from 76% to 16%, and the frequency of rib spalling over 0.50 m decreased from 72% to 23% after the technology was applied in coal face of No.1523. So no serious accidents of rib spalling and roof fall occured, the control problem of support–surrounding rock instability in the coal face of large inclination and island district were solved.

Key words: large inclination fully mechanized island face, rib spalling, fault diagnose, relationship of support &ndash, surrounding rock