THE ALTERNATING TEMPERATURE EFFECTS AS A FACTOR FOR ENERGY SAVING TECHNOLOGIES OF COMPLEX PREPARATION OF RAW MATERIALS IN PERMAFROST CONDITIONS
The paper presents the results of experimental researches of influence alternating temperature effects on destruction of rock samples. It was found that the mechanism of disintegration of rocks develops due to the formation of non-uniform in the volume of rock stresses; the maximum values of these stresses are associated with the degree of saturation of the pore space of rocks by moisture. Conducted model estimates the alternating temperature treatment on the occurrence of wet particulate material rock stress-strain state. As the main mechanism of the physical destruction of rocks considers formation of internal mechanical stresses due to non-uniform across the section of a piece of rock by ice. They can act as a controllable parameter process heat and mass transfer at alternating temperature influence to create a non-uniform stress. The experimental and calculated data show significant effects of alternating temperatures and initial moisture content on thermal stress state of the particulate material rocks. They can be used to reduce energy consumption for destruction of rocks, as well as serve as a basis for the development of energy-saving and efficient technologies for processing mineral resources (crushing processes and concentration) increase the disclosure mineral grains.