全长锚注支护技术在断层破碎区的应用

Application of Full-length Bolt-grouting Support Technology in Fractured Fault Zone

为了保证8303辅运巷过断层期间顶板稳定,提高巷道过断层的掘进效率,分析了断层带围岩力学参数,提出了全长锚注支护技术,巷道在0~25d范围内围岩变形逐渐降低,在25d后顶底板、巷帮变形趋于稳定,顶板最大下沉量控制在0.24m以下,巷帮最大移近量控制在0.29m以下,与巷道完整阶段变形量相差不大,具有显著应用成效。

In order to ensure the stability of the roof and improve the tunneling efficiency of the 8303 auxiliary haulage roadway during passing through the fault,the mechanical parameters of the surrounding rock in the fault zone are analyzed,and the full-length bolt grouting support technology is proposed.The deformation of the surrounding rock in the 0~25d range of the roadway is gradually reduced.After 25d,the deformation of the roof and floor and the roadway side tends to be stable,the maximum subsidence of the roof is controlled below 0.24m,and the maximum displacement of the roadway side is controlled at 0.29m in the following,there is no significant difference between the deformation in the complete stage of the roadway and it has significant application effect.