Research and application of advance supporting technology for 8. 2 m large mining height fully- mechanized face

According to the problems of advance support of large cross-section mining roadway in 8.2 m large mining face in Jinjitan Coal Mine, the double-row mul ti-section self-moving advanced support frame type was determined by comprehensive geological conditions and propulsion efficiency.Adopting the support concept of I 0W initial support and high engineering resistance and the automatic assurance technology of initial support force, new structures, such as anti-roof guard, walking cont rol and slope connecting beam were developed and the advanced support group of air return lane and transport lane was developed. The downhole test showed that th e anti-mine pressure ability of the advanced support was strong, the propulsion efficiency was high, the top roof of the advanced roadway was complete and had good a daptability. The repeated support function of the integral support beam of the advance support to the roof was further analyzed, which could provide a model and refere nce for the advance support technology of the ultra large height mining face.