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为了研究深部隧(巷)道围岩稳定性机理与支护控制技术,以千米埋深为基本条件,考虑三轴六面恒压加载和数字照相量测先进技术的应用,研制了一套结构紧凑、特色鲜明的真三轴框架式大型物理模拟试验系统。该系统由模型加载反力框架、以扁油缸与真空回油为特色的液压加载控制系统、自行研制的数字照相变形量测与围岩应力测试系统和开挖支护辅助装置4部分组成,可用于长1000 mm×宽1000 mm×厚1000 mm的深部隧(巷)道大型物理相似模型试验研究。最后给出在深部矿山巷道围岩变形受力观测分析与围岩分区破裂化现象再现试验的应用实例。应用结果表明,本套试验系统对于研究包括矿山巷道、TBM隧道在内的深部隧(巷)道工程开挖与支护过程中围岩变形与应力分布规律及其稳定控制作用机理都具有重要价值。
In order to study the surrounding rock stability mechanism and support control technology of deep tunnel (laneway), taking the depth of one kilometer as the basic condition, considering the application of the advanced technology of three axis and six sides constant pressure loading and digital photogrammetry, a set of Compact, distinctive features of true three-axis frame-type large-scale physical simulation test system. The system is composed of a model loaded reaction force frame, a hydraulic loading control system featuring a flat oil cylinder and a vacuum oil return, a digital photographic deformation measurement system and a stress measurement system for rock surrounding rock and an excavation support device Experimental Study on Large Physical Similarity Model of Deep Tunnel with 1000 mm in Length, 1000 mm in Width and 1000 mm in Thickness. Finally, the application examples of the stress field analysis and analysis of the surrounding rock deformation in the deep mine roadway and the reconstruction test of the surrounding rock partitioning are given. The application results show that this set of test system is of great value for studying the deformation and stress distribution of surrounding rock and its mechanism of stability control during the excavation and support of deep tunnel (gateway) including mine tunnel and TBM tunnel .