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以新疆伊犁一矿为工程背景,通过相似模拟试验研究了厚砾石层斜井围岩破坏机理,分析了围岩压力和位移变化规律.研究表明,在斜井开挖过程中,井筒围岩塌方破坏从拱顶开始,并逐渐向上发展;无水砾石层井筒围岩从浅到深,随着压力差的增大,对应部位围岩失稳的可能性也越大;井筒开挖过程中,围岩应力总体呈下降趋势变化,围岩破坏过程中,拱顶和两帮垂直、水平应力均呈减小趋势变化;拱顶围岩位移变化量大于侧帮位移量,底板位移量最小.研究结果为优化支护方式提供了实验依据.
Taking the first mine in Yili, Xinjiang as the engineering background, the failure mechanism of surrounding rock in thick gravelly inclined shafts was studied through similar simulation tests, and the variation regularity of surrounding rock pressure and displacement was analyzed.The results show that in the process of inclined shaft excavation, Damage from the vault began and gradually upward development; waterless gravel layer of wellbore rock from shallow to deep, with the pressure difference increases, the corresponding part of the surrounding rock instability is also more likely; wellbore excavation process, The stress of surrounding rock generally shows a downward trend. During the process of surrounding rock failure, the horizontal and vertical stresses of vault and two strata all show a decreasing trend. The displacement of surrounding rock in the vault is larger than the displacement of the side and the displacement of the floor is the least The results provide an experimental basis for optimizing support methods.