Study on location selection and support parameter optimization of short distance multi-seam mining roadway
Aiming at the serious deformation of the roadway in the lower layer coal seam when the top coal face was caved under the overlying goaf and the remaining protective coal pillar,and the problem such as roof falling and buckling occured in the working face of the lower coal seam during the mining process,Taking Luzigou coal Industry as example the stability of the roadway under the remaining coal pillar was studied by FLAC3D numerical simulation.The results showed that the stress environment was greatly improved when the coal roadway and coal pillar were separated by 35m.With reasonable roadway layout scheme and high prestressed strong support scheme,the mine pressure monitoring results showed that during mining,the roadway roof and floor displacement was 90mm,the two-side displacement was 179mm,and the roadway section shrinkage was only 3.9％,which ensured the safe and efficient recovery of coal resources in the lower 5#coal seam.
short distance coal seamdynamic pressure roadwayroadway locationparameter optimization
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