为探索深部岩体的动态力学特性,研制深部岩体动态特性多功能试验系统。该系统主要由加载装置和量测系统组成,其中加载装置包括延时控制系统和加载工作台,量测系统由光纤位移计、加速度传感器、电荷放大器、高速数字采集处理系统和电脑组成。加载时通过合理选择锤重、锤高、摆长、摆角和作用时间间隔等试验参数,利用电子和机械控制装置,实现试验所需要的水平静载、水平冲击和垂直冲击等多种形式的荷载组合,达到预设的冲击延时。进行块体间摩擦因数测量、摩擦减弱效应等试验,其应用情况表明,该系统结构新颖、指标先进、灵活方便、荷载可以任意调整,为研究深部岩体如超低摩擦特性、准共振特性和摆型波等特殊力学现象,提供方便、可靠的试验设备。
In order to explore the dynamic mechanical behaviors of deep rock masses, multipurpose test system of deep rock mass for dynamic mechanical behaviors is developed. The system is composed of loading devices with time delay control system and measurement system, optical fiber displacement meter, acceleration transducer, charge amplifier, high speed data collection and data processing system and computer. When loading, many kinds of load combinations such as horizontal dead load, standard impact and perpendicular impact are realized. The advanced impact time is achieved by reasonably selecting test parameters such as the hammer weight, hammer height, pendulum length and pendulum angle, acting time, electronics and mechanical control devices. The practical application of these tests such as frictional coefficient measurement among rock blocks: and friction-weakening effect indicates that this system has particular structure, advanced indexes, convenient operation, in which the load can be chosen freely. This system can provide the convenience and the failure-safe test equipment to study the specific dynamic behaviors of the deep rock mass such as super-low friction, quasi-resonance specialty and pendulum mould wave.