Researches into Mechanical Properties of Rocks under Dynamic (Cyclic) Loading
Researches into mechanical properties of rocks are mostly done under static (quasistatic) loading. In nature, however, rocks are also often subjected to dynamic (vibration) loading as a result of propagation of seismic waves due to e.g. earthquakes, rockbursts, blasting operations, etc. This type of loading can be simulated on a modern press, MTS 816 Rock Test System, purchased by VSB-Technical University of Ostrava. Whereas in the past, especially stress-strain and energy characteristics in the course of dynamic (cyclic) loading were observed on this test system, recently research has focused mainly on the observation of rheological properties during this loading. In the course of observation of energy characteristics of mechanical loading, anomalies were found before achieving the limit of ultimate strength. The cause of them is probably the action of energies other than mere mechanical energy. For this reason, research focused on the determination of temperature changes in the course of rock dynamic loading as one of possible causes of the occurrence of mentioned anomalies. During the observation of rheological properties under dynamic loading, tests were carried out both in creep regime and in relaxation regime, at various levels of average load or strain and at various vibration parameters (frequency, amplitude). The submitted article presents some results from the above-presented researches.
J.(S)ancer V.Petro(s)
V(S)B- Technical University of Ostrava, Ostrava, the Czech Republic
国际会议
香港
英文
1-6
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）