Experimental study on determination of resistivity of coal mine paste filling material

For the performance of pastes, a large number of laboratory research methods at this stage focus on the research of the chemical composition and mechanical properties of various components. This article starts with the determination of the resistivity of paste materials and develops a new idea for real-time monitoring of material properties. The measurement of resistivity is analogous to the entry of the etchant through the pore network of the paste, which simulates the parameters of the paste infiltration process well, so as to explore the initial performance of the paste. In this paper, four types of cement with different compositions are selected, and a total of 48 samples are cast, which proves the effect of cement type and water-cement ratio on paste resistivity; one-item analysis of variance and Turkey’s test are applied to verify the paste resistivity over time trend. And the best-fit polynomial for the evolution of resistivity with time is proposed in order to estimate the long-term resistivity of the paste.