Aiming at the support problems of the roadway of the horse head gate in the refuge chamber group area of an inlet shaft of a mine,we comprehensively applied on-site research,literature search,theoretical analysis and other research methods to study the characteristics of the mine pressure and the deformation and damage characteristics of the peripheral rock of the roadway in the area where it is situated,and then analysed the shortcomings and optimisation direction of the original support scheme of the roadway,so as to design a set of"high pre-stressing anchors and cable overall support scheme",and successfully carried out engineering practice.A set of"high prestressing anchor cable overall support scheme"was designed and successfully put into practice.The observation of mine pressure after digging support shows that after the implementation of the optimised support scheme,the amount of top and bottom plate migration,the amount of two gangs migration,and the value of the top plate off the layer have been effectively controlled,which realises the effective support for the large section roadway under the condition of coal mudstone and ensures the safety of production in the mine.
large sectionrefuge groupdynamic pressurestability of surrounding rocksupport scheme
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