中厚煤层沿空留巷围岩控制技术研究

Research on surrounding rock control technology of gob side entry roadway in medium thick coal seam

以贺西煤矿3302(2)综采工作面回风平巷为研究对象,根据该煤矿工程地质条件,分析了沿空留巷围岩变形及控制机理,提出了沿空巷道一次成巷支护方案、巷旁支护方案及二次补强支护方案。工程实践表明,该巷道围岩变形得到有效控制。

In this paper,the 3302（2）fully mechanized mining face return airway in Hexi Coal Mine is taken as the research object.According to the engineering geological conditions of the coal mine,the deformation and control mechanism of surrounding rock along gob side entry retaining are analyzed.Then this paper proposed a roadway support project along the roadway,roadside support program and secondary reinforcement support program.Engineering practice shows that the surrounding rock deformation of the roadway is effectively controlled.