Rapid excavation and supporting technology of ultra-thick top coal roadway based on excavation and bolting integration
LIU Yuedong
LIN Jian
YANG Jianwei
JIANG Pengfei
Abstract：In order to realize the rapid excavation of boher miner in ultra-thick top coal roadway,theoretical calculation and numerical simulation are used to research the stress,displacement under different driving speeds.Based on the structural characteristics of the bolter miner,the support system of the roof and sidewall bolt not in a row is presented;by improving the supporting materials,optimizing the operation process,the driving speed has been improved.The research results show that the position of the peak support pressure in front of the roadway is close to the head,the peak stress increases,and the range of the lateral stress zone and the displacement of the surrounding coal and rock mass area are correspondingly reduced.The supporting system reduces the overlap of the roof and the sidewall stress in a certain extent,but achieves the timely support of the sidewall.When the bolter miner was used,the average daily footage increased to 14 m/d,while the labour intensity of workers reduced,which could provide a good reference for the application of rapid excavation in ultrathick coal seam.
Keywords：bolter minerultra-thick coal seamrapid excavationsupporting technology
Publication Date：2017-01-01