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针对现场地质条件,分析了影响巷道变形的主要因素,采用FLAC3D数值模拟软件研究了在高、低构造应力的作用下采用U29型钢支架壁后充填、高性能锚杆和U型钢壁后充填+底角锚杆3种不同的支护方式时,巷道的位移场、应力场和塑性区的变化情况.模拟结果显示:采用第三种支护方式较为合理.现场工程应用结果表明:在采用新的支护方式后巷道两帮及底鼓变形量减少80%以上.研究成果对于相似条件下的巷道支护具有借鉴意义.
According to the geological conditions of the site, the main factors affecting the deformation of the roadway were analyzed. The FLAC3D numerical simulation software was used to study the effects of high and low tectonic stress on the post-filling of U29 steel bracket wall, The displacement field of the roadway, the change of the stress field and the plastic zone when the rock bolt is supported by 3 kinds of angle bolts, the simulation result shows that it is more reasonable to use the third kind of supporting method.The field engineering application results show that, After the support mode, the deformation of the two gangs and the bottom drum reduced by more than 80% .The research results have reference significance for the roadway support under similar conditions.