松软煤层巷道围岩变形特征及控制技术

针对松软煤层巷道围岩变形量大、支护结构破坏严重的难题，以华盖山104工作面运输巷为工程背景，在分析巷道围岩变形特征的基础上，采用数值模拟方法，研究了锚网索喷支护巷道围岩位移、应力和塑性区分布特征。研究结果表明，煤层强度低、胶结性差以及支护方式不合理是造成围岩严重变形的主要原因；锚网索喷支护巷道围岩塑性区范围较小，应力集中区位于深部，到巷道中心的距离超过6 m，并取得了较好的工程应用效果。

Deformation Characteristic of Surrounding Rock of Roadway in Soft Coal Seam and Its Controlling Technology

Aiming at the difficult problem of large deformation of surrounding rock and serious failure of support structure of roadway in soft coal seam,distribution characteristics of displacement,stress and plastic zone of surrounding rock is analyzed by way of numerical simulation,taking Huagaishan 104 working face headway as the engineering background,based on the analysis of deformation characteristics of roadway surrounding rock.The result shows the main reasons for the serious deformation of surrounding rock are the low strength of coal seam,the poor cementation and the unreasonable supporting mode.The plastic zone of surrounding rock is small,the stress concentration zone is located in the deep part,and the distance to the roadway center is more than 6m,so that good engineering application effect is achieved.