Research on key mining technology of fully-mechanized working face with 8 m large mining height

In order to solve the 8 m problem of the safe and efficient mining of thick coal seam, taking Bulianta Coal Mine first 8. 0 m large mining height mining fac e as the research object, through joint technical research, formed a group with independent intellectual property rights of the key technology of Shendong. Supporting a total power of 13 009. 4 k W was achieved in the supporting technology of heavy equipment, equipment and technology to further enhance the level of hunger. In the su rrounding rock control, the formation of large section roadway support technology, high-pressure water fracturing technology, strong resistance of the first caving suppor t technology, the large mining height of mine pressure law was summed up. In the mining area, the formation of the double bracket, the vertical transition process, reso urce recovery rate was improved. In the information technology, the formation of equipment, dynamic monitoring, data acquisition and so on. Through the application of some key technology of fully-mechanized mining face, to achieve 44 800 tons per day, with an annual output of 15.5 million tons of production capacity, the recovery rat e was 98. 12%, which provide technical guidance and reference to similar 8 m under the condition of thick seam mining.