塑性煤柱区巷道掘进数值模拟研究

Study on Roadway in Plastic Pillar by Numerical Simulation

以某矿3#煤层的残煤区为背景,采用FLAC3D软件对在残留塑性煤柱区掘进巷道时其围岩破坏规律进行了分析研究。研究表明:在塑性煤柱中掘进巷道,煤柱上的应力由原先的"拱形"分布变为均匀分布,且应力值也显著降低,上覆岩层载荷全部转移到空巷外侧实体煤上,整个煤柱发生剪切破坏,失去支撑能力。

Takes the residual coal area of No.3 coal seam in some coal mine and after the numerical simulation experiments for the roadway in plastic pillar through the FLAC3 Dsoftware, concludes:roadway in plastic pillar, the stress of coal from the original column 'arch' distribution becomes uniform, and also significantly reduces stress, the whole pillar shear failure lose their ability to support.