Development of a test system for dynamic characteristics of blocky rock mass and its application
JIANG Haiming1, LI Jie1, WANG Mingyang1,2
1.State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,-Army Engineering University of PLA, Nanjing 210007, China；
2.School of Mechanical-Engineering， Nanjing University of Science and Technology, Nanjing 210094, China
Deep rock mass is a block-hierarchical structure, it plays an important role in rock nonlinear dynamic behaviors.Here, a test system was developed to investigate dynamic characteristics of deep rock mass.The test system mainly was composed of a loading device and a measurement system.Vibration exciters were taken as dynamic sources in the loading device to apply various forms of load dynamic and static combinations, such as, horizontal static load, horizontal impact and vertical impact to a structural system consisting of rock blocks.The measurement system consisted of acceleration sensor, charge amplifier, laser fiber displacement meter and dynamic signals measurement & analysis system.One-dimensional dynamic impact tests of a granite block model were performed to obtain the frequency spectrum and amplitude characteristics of elastic wave propagation.Test results showed that the test system's design is reasonable, it is easy to operate and has a high measurement accuracy; it can be used to study nonlinear rock mechanical phenomena of block rock mass.
蒋海明1，李杰1，王明洋1,2. 块系岩体动态特性测试系统研制及其应用[J]. 振动与冲击, 2018, 37(21): 29-34.
JIANG Haiming1, LI Jie1, WANG Mingyang1,2. Development of a test system for dynamic characteristics of blocky rock mass and its application. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 29-34.
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