In order to solve the problem of large deformation of the surrounding rock in deep thick coal seam,taking 18507 working face of Malan Mine as the research object,numerical simulation software was used to study the support of anchor rods and anchor cable injection of the surrounding rock of the roadway,firstly,the support effect was analysed under different anchor lengths and spacing of anchors and it was found that the optimal length of the anchor rods was 2.4 m,and the spacing of anchors was 0.9 m x 0.9 m.Meanwhile,the analysis of the support effect was conducted on the anchor lengths and scope of injection,and it was found that the anchor lengths and scope of injection of anchors increased with the length of anchors.At the same time,the length of anchor cable and grouting range were analysed,and it was found that with the increase of anchor cable length and grouting range,the deformation of surrounding rock at this time was gradually reduced,but the trend of reduction was gradually slowed down,and the optimal length of anchor cable was finally determined to be 8.3 m,and the optimal grouting range was 7 m,which provides certain guarantee for the stability of the roadway of the deep and thick coal seam in the mine.
deep thick coal seamnumerical simulationanchor lengthgrouting rangeanchor spacing
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