摘要
Abstract
There are many influencing factors on the failure and instability of roof surrounding rock in deep roadway along goaf,and the stress environment and failure and instability mechanism of the surrounding rock body are very complex.In order to study the instability factors of lateral roof surrounding rock in deep roadway along goaf,taking Suncun Coal Mine as the background,the roof instability factors of deep roadway along goaf are obtained by methods of theoretical analysis and numerical simulation.The research results indicate that based on the stress structure of the surrounding rock structure body in roadway along goaf,it is revealed that the instability of the lateral roof surrounding rock is mainly related to the basic roof thickness,support resistance of the roadway side,burial depth,and roof lithology;using numerical simulation,it is found that the basic roof thickness has the greatest impact on the structural instability of the roof and coal side when it is between 30-38 m.The change in roof lithology is positively correlated with the maximum stress concentration of the surrounding rock,and negatively correlated with the influence range of the surrounding rock stress concentration;the greater the burial depth,the greater the deformation of the roof,and the higher the risk of fracture;the magnitude of roadway support resistance has almost no effect on the instability of the roof and coal side.关键词
深部/沿空巷道/顶板失稳/影响因素/数值模拟Key words
deep/roadway along goaf/roof instability/influencing factor/numerical simulation分类
矿业与冶金
