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采用UDEC模拟开采上解放层条件下综放工作面回采对巷道稳定性的影响。通过分析被解放层垂直应力及巷道表面位移,得出:开采解放层后,被解放层煤体垂直应力分布可划分为原岩应力、应力升高、应力降低和应力恢复4个区,开采上解放层条件下,被解放层开采对巷道的超前影响距离明显降低,数值模拟结果和现场实测结果一致。
Effect of Mining Face with Fully Mechanized Caving Mining Face on Stability of Roadway with UDEC Simulated Mining on the Liberated Layers. By analyzing the vertical stress of the liberated layer and the surface displacement of the roadway, it is concluded that the vertical stress distribution of the liberated layer can be divided into four areas: original rock stress, stress increase, stress reduction and stress recovery after mining the liberated layer. Under the condition of the liberation layer, the influence of mining by the liberated layer on the advance of the roadway is significantly reduced. The numerical simulation results are in good agreement with the field measurements.