Abstract: In order to study and master the behavior and characteristics of mine pressure at mechanized coal face of large mining height during end-mining and ensure equipments rapid retracement in Chahasu coal mine, this research was made on the governance practices in 3101 working face, combined the theories and field measurement, in order to determine reasonable yield mining position and mining plan, the behavior of mine pressure during end-mining were analyzed by using end resistance weighting criterion and resistance increase rate weighting criterion. The study result shows that the periodic weighting distance is 18.6m and the sustain length is 4~6m in 3101 working face. It could control weighting position and decrease weighting length effectively by using yield mining technology. Reasonable position of yield mining could make sure a mild roof strata behavior when hanging nets, cut-through and equipments retracement. It could be more effective by combining end resistance weighting criterion and resistance increase rate weighting criterion to analyze the behavior of mine pressure. The researchers have devised a provide a references for safety production and rapid equipments retracement in mechanized coal face of large mining height during end-mining., In order to study and master the behavior and characteristics of mine pressure at mechanized coal face of large mining height during end-mining and ensure equipments rapid retracement in Chahasu coal mine, this research was made on the governance practices in 3101 working face, combined the theories and field measurement, in order to determine reasonable yield mining position and mining plan, the behavior of mine pressure during end-mining were analyzed by using end resistance weighting criterion and resistance increase rate weighting criterion. The study result shows that the periodic weighting distance is 18.6m and the sustain length is 4~6m in 3101 working face. It could control weighting position and decrease weighting length effectively by using yield mining technology. Reasonable position of yield mining could make sure a mild roof strata behavior when hanging nets, cut-through and equipments retracement. It could be more effective by combining end resistance weighting criterion and resistance increase rate weighting criterion to analyze the behavior of mine pressure. The researchers have devised a provide a references for safety production and rapid equipments retracement in mechanized coal face of large mining height during end-mining.

Key words: End-mining, Mine pressure behavior, Wait mining, Weighting criterion, Resistance increase rate