南关煤业受动压影响巷道钢管混凝土支架支护应用研究

Application of concrete filled steel tube for roadway support under dynamic pressure in Nanguan Coal Mine

南关煤业西翼轨道巷、西翼皮带巷和西翼回风巷属于典型的受动压影响的大变形难维护的巷道,为保证煤矿的安全生产,巷道开挖后处于频繁返修的状态,需要投入大量的人力物力。为解决南关煤业三条大巷存在的支护问题,在分析巷道围岩条件、原岩应力和原有支护变形特征的基础上,提出了基于钢管混凝土支架的复合支护方案,在3209工作面采动影响区域进行了现场对比试验。试验结果表明,与其他加固方式相比,钢管混凝土支架支护段围岩变形得到了有效控制,所设计的钢管混凝土支架支护方案适用于南关煤业动压巷道支护。

The west wing track lane,west wing transportation lane and west wing return air roadway in Nanguan Coal Mine are typical large deformation and hard-to-maintain roadway under the dynamic pressure.The roadway was frequently repaired after excavation,to ensure the safe production of coal mine,consuming a lot of manpower and material resources.In order to solve the support problems of the three main roadways in Nanguan Coal Mine,based on the analysis of surrounding rock conditions,in-situ stress and deformation characteristics of the original support,a composite support scheme based on concrete-filled steel tube support was proposed.Field comparative test was carried out in the mining affected area by 3209 working face.The test results show that,compared with other reinforcement methods,the deformation control of surrounding rock is more effective using concrete-filled steel tube support,and the designed support scheme of concrete-filled steel tube support is suitable for dynamic pressure roadway support in Nanguan Coal Mine.