近距离煤层采空区下底板破坏特征分析

Analysis on the Floor Break Features under the Close Distance Coal Seams Goaf

针对近距离煤层下层煤回采巷道受上层煤采动影响,其顶板岩层受到不同程度破坏、整体性相对较差、支护难度较大的实际问题,利用离散元软件UDEC对上下两层煤夹层厚度不同时下层煤顶板破坏特征及回采巷道稳定性进行了分析,为下层煤回采巷道选择合理支护方式及设计支护参数提供理论支持,具有一定的实践应用价值。

Aiming at the practical problems of broken roof strata,poor integrity and difficult support in the lower coal roadway of close distance coal seams.Through discrete element program UDEC software analyzed roof break fea-tures of lower coal seam and the stability of roadway when the two layers is not the same thickness.Provides the theo-retical foundation for reasonable supporting method and parameters design of the roadway under the goaf,Have a cer-tain theoretical and practical application value.