关键词: 末采, 推进速度, 来压规律, 合理等压位置, 回撤通道支护

Abstract: To study and master the behavior and characteristics of mine pressure in mechanized coal face of large mining height during end-mining and ensure equipments rapid retracement, 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 effect of different mining velocity on the effect of pressure characteristics were analyzed and the support scheme was designed. The study result shows that it could increase weighting distance and sustain length significantly by accelerating mining velocity, while the loading distribution and dynamic load coefficient of the powered supports were influenced less. It could control weighting position ,increase weighting distance and sustain length effectively by using yield mining technology. Reasonable coal pillar length of yield mining could make sure a mild roof strata behavior when Hanging nets, cut-through and equipments retracement. The effect of mining pressure on roadway deformation could be mitigated by using supplement support technology. 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, Mining velocity, Mine pressure behavior, Reasonable yield mining position, Equipment remove gateway support