Abstract: In view of the large-scale fold structure encountered during the 8120 return airway excavation process of Dayangquan Coal Mining Company,the technical scheme of advance geophysical exploration+grouting reinforcement+high prestressed anchor bolt and cable joint support is proposed.The practice results show that the scheme can guarantee the safety of the roadway during the process of passing through the fold structure,shorten the working hours and increases the coal recovery rate and create huge economic and social benefits.

Key words: Folding structure, Grouting reinforcement, High prestress, Bolt supporting