Support Technology for Rapid Forward Face End of Fully Mechanized Top Coal Caving Mining Face

In order to solve the face end support dificult removing, the influenced support efficiency and other problems of the fully mechanized top coal caving min ing face, the theoretical analysis and the site measuring method was applied to measure the support parameters of the face end roof in No.5213 fully mechanized top C oal caving mining face of Wangzhuang Mine and analyze the surface displacement and separation of the gateway.A comparison analysis was conducted on the mine str ata pressure behavior law and average support removing time of the two support methods as the beginning support, the rear support or the hydraulic single prop with th e connected roof beam support and face end support.The results showed that when the influence scope of the advance support pressure was about 50 m, the surface d eformation of the gateway would be within 300 mm and the support removing time of the first support method would be about 1/2 shorter than the face end support met hod.Therefore in the site operation, based on the previous five bolts applied in the roof of the face end, the hydraulic single props and connected beam support combin ed support would be more sufficient to meet the actual support requirements.