覆岩采动裂隙分布特征的研究

Study of features of distribution of overlaying stratum fractures caused by mining

本文应用模型实验、图像分析、离散元模拟等方法，对上覆岩层采动裂隙分布特征进行了研究。揭示了长壁工作面覆岩采动裂隙分布的两阶段特征与“○”形圈特征，建立了卸压瓦斯的“○”形圈抽放理论，并将其应用于淮北矿区卸压瓦斯的抽放，取得了显著效果。

With analog testing, graphical analysis, discrete element calculation method, the features of mining caused fractures of overlaying strata is studied. The result is revealed the two stage feature and 'O' shape distribution characteristics of the mining caused fractures of overlaying strata. An 'O' shape circle drainage theory to release methane is built and used in Huaibei Mining Bureau successfully.