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结合甘庄煤矿5305回采巷道现场地质条件,分析其破坏机理,总结得出上部近距离采空区煤柱影响、本煤层相邻工作面采动影响和巷道原支护体系强度不足是导致5305回采巷道变形破坏的主要原因。在理论分析的基础上,利用FLAC3D模拟软件分析了高应力情况下巷道围岩的变形特征,结合“三高一低”和经济合理性设计原则,确定5305回采巷道的合理支护技术参数,并在现场进行实施,效果良好。
Based on the site geological conditions in 5305 mining gateway of Ganzhuang Coal Mine and the failure mechanism, the influence of coal pillar in the upper gob area is concluded. The influence of mining on the adjacent working face of coal seam and the weakness of the original support system in the coal seam is 5305 The main reason of roadway deformation damage. Based on the theoretical analysis, the deformation characteristics of surrounding rock under high stress are analyzed by using FLAC3D simulation software. According to the design principle of “three high and one low” and economic rationality, the reasonable support technical parameters of 5305 roadway , And implemented in the field, the effect is good.