Control And Support Technology Of Large Deformation Dynamic Pressure Roadway

Coal is the major energy source, with the mining of coal, mining depth increased, roadway support technology will become increasingly important. Typical dynamic pressure roadway this topic to Huangling coal mine roadway and auxiliary transport409Lane407wind carried back to concrete results, based on the formation of two ore mining for huangling reasonable roadway support technology system. Huangling coal face in one side three roadway layout, respectively tape Lane, return airway and auxiliary transport lane, which transport between the auxiliary lane to lane and tape coal pillar30m apart, auxiliary transport lane in After the end of the mining face and will continue to be used as a face in the next adjacent return airway.(Ie as the next face in the return airway) due to the impact of multiple mining operations, auxiliary transport lane during the second multiplexing severe deformation will occur, especially in the amount of deformation and the bottom of the largest coal-help will be more than1000mm, resulting in the roadway section sharp contraction, seriously affected the production of safe and efficient face.Currently Huangling mining technology in general support the overall high strength bolting stage, high-strength bolting technology for ordinary roadway support has certain adaptability, but it is difficult to achieve large-span, large cross section, strong mining conditions the effective maintenance of the roadway.For409auxiliary transports Lane, strengthen controls at the top of thick coal seam roof, to help strengthen the surrounding rock control department, to strengthen the integrity of the control and bearer capability coal pillars to help. Roof and two to help with the use of high strength prestressed anchor cable network support, with rapid hardening cement floor reinforcement. After409mining face, according to auxiliary transport lane maintenance condition and the observation result, large deformation for local area appropriate Enlargement and secondary reinforcement.Lane407back against the wind, using Digging Machine cut at the end, to design the roadway brush height3600mm. And then the surrounding rock roadway surface treatment, the emergence of local circumstances rock pocket nets, which can be let go, and then depending on the circumstances at that position up to play anchor rope, spelling Department should promptly fill bolt hit. For the already loose, broken bolt failure, etc., in the vicinity of the original location up to play the monomer or monomer anchor bolt.After computer software analysis and real rock pressure observation site support to meet the control requirements of the roadway deformation during excavation and recovery, to ensure stability and normal use of the roadway for safe and efficient mining face provides the prerequisites.