花草滩煤矿轨道暗斜井变形破坏机理研究

随着煤矿开采深度的增加，U型钢被动支护难以缓解轨道暗斜井的变形。为解决轨道暗斜井巷帮移进和底鼓问题，采用数值模拟方法，分析了不同终采线位置时巷道的变形破坏规律，对煤柱宽度影响暗斜井围岩变形现象进行研究，总结出其内部应力分布规律。基于巷道塑性区演化规律，分析了暗斜井巷围岩的应力分布状态，发现巷道呈非对称性变形；此外，研究了相同应力分布特征、不同终采线时巷道变形的变化规律。研究结果表明，随着终采线距离增加，围岩最大变形量减小。

Study on deformation and failure mechanism of track blind inclined shaft in Huacaotan Coal Mine

With the increase of mining depth，U-shaped steel passive support is difficult to alleviate the deformation of track blind inclined shaft.In order to solve the problems of sidewall moving and floor heave in track inclined shaft，this paper analyzed the deformation and failure law of roadway under different stopping line positions by using numerical simulation method，to study the influence law of coal pillar width on surrounding rock deformation of underground inclined shaft，and obtained the distribution law of internal stress of coal pillar.Based on the evolution law of plastic zone of roadway，the stress distribution state of surrounding rock and asymmetric deformation characteristics of roadway were obtained.In addition，the variation law of roadway deformation under the same stress distribution characteristics and different stopping lines was studied.The results showed that with the position of stopping line being pushed back，the width of coal pillar decreased and the deformation of surrounding rock of roadway increased.