| In the process of coal mining of roadway driving along goaf, Its development includes wide coal pillar support of roadway driving along goaf and narrow coal pillar of roadway driving along goaf, and support of overall roadway driving along goaf. Support of overall roadway driving along goaf is a new thing, and not found in the coal mining enterprises.This paper analyses supporting technique of the overall roadway driving along goaf thoroughly by using the research project of Anhui university of science and technology mining engineering mechanics and supporting research institute supported by Huaibei Mining Company, Guo bei coal mine.Combined with complex geological conditions and asymmetrical force of roadway driving along goaf in Guo bei coal mine, it provides a reinforced supporting technology of metal anchor frame called "metallic frame plus reinforcement anchor support". It analyses interaction mechanism of the support technology of metallic frame and reinforced anchor, the principle of inhibition of roadway deformation through the overall support technology and keeping the stability of roadway.In this paper, through theoretical calculation and numerical simulation of mechanics model,comparing results of the pure metal scaffolding support, reinforced two rows of anchor support, and reinforced three rows of anchor support, concludes that metallic frame from spandrel to tent leg bottom around entity sideof the coal roadway driving along goaf is the weak part, demanding reinforced supporting. Reasonable anchor reinforcement support for bearing metallic frame stress is of great significance.Interaction effect of the joint technology of metallic frame and reinforced anchor is able to ensure that the important conditions are implemented in overall roadway driving along goaf. At the same time, the success of the project of the roadway driving along goaf provides an important reference for later similar roadway reinforcement and supporting design. |
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