使用小型围岩试件模拟与再现巷道围岩开挖卸荷过程的试验系统

发布时间：2018-06-25 05:45

本文选题：岩石力学 + 小型围岩试件　；参考：《岩石力学与工程学报》2017年09期

【摘要】：为了实现在实验室进行巷道(隧道)开挖卸荷过程的模拟,获得对围岩试件进行开挖卸荷试验的创新性监测方法与成套试验技术,研制了一套可以使用小型围岩试件模拟与再现巷道围岩开挖卸荷路径的试验系统。该系统主要由3个独立的子系统组成:(1)系统I:SAM 3000型微机控制电液伺服岩石三轴试验系统;(2)系统II:小型巷道围岩试件加、卸载腔;(3)系统III:声波声发射一体化测试系统。通过对3个子系统进行软、硬件集成与调试,获得了小型巷道围岩试件级别(高290 mm,外径200 mm,内径100~150 mm)的开挖卸荷过程的室内模拟与再现。使用小型巷道围岩试件进行了初步的开挖卸荷试验研究,结果表明,所构建的试验系统可以有效地模拟:巷道围岩的开挖卸荷条件;巷道围岩在开挖卸荷条件下的变形规律、应力分布特征和破坏机制等。
[Abstract]:In order to simulate the unloading process of roadway (tunnel) excavation in laboratory, the innovative monitoring method and complete set of test technology for excavating unloading test of surrounding rock specimen are obtained. A set of test system which can simulate and reproduce the excavation and unloading path of roadway surrounding rock is developed. The system is mainly composed of three independent subsystems: (1) I: SAM 3000 microcomputer controlled electro-hydraulic servo rock triaxial test system; (2) system II: small roadway surrounding rock specimen loading, unloading cavity; (3) system III: acoustic emission integrated testing system. Through software, hardware integration and debugging of three subsystems, indoor simulation and reappearance of excavation unloading process of small roadway surrounding rock samples (high 290mm, outer diameter 200mm, inner diameter 100mm) were obtained. The preliminary excavation unloading test was carried out by using small tunnel surrounding rock specimens. The results show that the constructed test system can effectively simulate the excavation and unloading conditions of roadway surrounding rock, the deformation of roadway surrounding rock under excavation unloading condition, and the deformation of roadway surrounding rock under excavation unloading condition. Stress distribution and failure mechanism.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家自然科学基金面上项目(51574247) 国家自然科学基金委员会与神华集团有限责任公司联合资助重点项目(U1261212,U1361210)~~
【分类号】：TD263

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