Coal Engineering ›› 2022, Vol. 54 ›› Issue (5): 54-58.doi: 10.11799/ce202205010

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Research and application of bolt mesh cable support technology in coal roadway under goaf

  

  • Received:2021-11-16 Revised:2022-02-24 Online:2022-05-13 Published:2022-05-23

Abstract: In order to solve the difficult problem of coal roadway support under the goaf, the causes of roadway deformation and failure under the previous passive support are systematically analyzed.Based on the failure law of overburden and the characteristics of cemented regenerated roof, combined with the composite beam theory and suspension theory of bolt support, a targeted bolt mesh cable active support scheme is proposed, and the roof duplex steel anchor cable beam + short beam support structure is designed and applied in the field.The results show that the application of bolt mesh cable support technology in coal roadway under goaf has realized the transformation of the support form of the lower layered roadway from passive support to active support, improves the roadway support strength, realizes the primary support of the large cross-section lower layered roadway, and the support effect is good. It can effectively control the deformation of the roadway surrounding rock, and can provide a reference for the roadway surrounding rock control under similar conditions.

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