Research on Roof Support Mechanics of Coal Mine Roadway
In order to solve the problem of difficult design of anchor cable support for top coal roadway,based on the strength parameters in Hoek-Brown criterion,the failure model of top coal roadway under anchor cable support was established based on the working face 2-618 of Li Yazhuang coal mine,and it was found that the anchor cable spacing had a greater influence on the supporting force,and under the premise of a certain thickness of the coal seam,the required supporting force would be greatly reduced with the decrease of the spacing,and the overlying pressure was the most significant among all the factors affecting the size of the anchor cable support force.Through the actual monitoring results of 2-618 working face,it is verified that the support scheme designed according to the model has good results,which can meet the needs of support design and ensure the stability of the actual roadway.
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