Changing regularity of rock damage variable and resistivity under loading condition

In this paper, the stress-strain, resistivity and acoustic emission simultaneous test of compression test for rock have been carried out to obtain the regression equation between the resistivity, and elastic modulus of rock under various damage state, then based on the rock damage theory, derived the changing regularity of rock damage variables and resistivity under loading condition. In accordance with the acoustic emission characteristic relative ratio, this paper has verified the feasibility of its changing regularity. By virtue of this relation equation, it is possible to online monitor the extent of surrounding rock progressive damage in mined-out regions, so as to bring forward the time for danger warning. Consequently, it is capable to take control measures in the initial stage of the development of disaster, which has very important significance for the prevention and management of mine dynamic disasters.