The time-space relationship between strain, microstrain temperature fields and microseismic emission parameters in geomodels with hole under external loading

摘要

A complex analysis of evolution of microseismic emission signals, temperature field and microdefofmation field under uniaxial loading before the destruction of prismatic samples from artificial geomaterial and rocks allowed to establish the relationship between the patterns of signal changes and the level of loading. The evolution of deformation process, development of microdamages and the formation of main rupture fracture lead to significant transformation of spectral composition of microseismic emission signals, microdeformation field, and the temperature field. In the region of future main discontinuity the temperature increases, localization of maximum microdeformations occurs and velocities of microdeformations components increase. Generation of powerful low-frequency harmonics at loads approaching the peak, can serve as a harbinger of a rupture on the surface and, consequently, destruction of the geomaterial.