Effect of Surfactants on Fracture Energy of Carbonate Rocks at Different Temperatures
E. V. Zakharov
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
Keywords: Surfactants, specific energy, fracture, temperature range, carbonate rocks, limestone, dolomite, porosity
Abstract
The article reports the experimental data on the effect of sodium laureth sulfate and neonol AF 9-12 on the fracture energy of dolomite at the Internatsionalnaya pipe and limestone at the Mokhsogollokh open pit at temperatures in a range of + 20 … - 30 °C. In the positive temperature range, the fracture energy of dolomite treated with surfactants, lowers by 28% on the average. Under negative temperatures, an increase is observed in the fracture energy of dolomite samples saturated with surfactant solutions. At the temperatures below - 10 °С, the fracture energy of dolomite exceeds its fracture energy at the positive temperatures by 2.3-3.1 times. The indicators of fracture of dolomite samples saturated with surfactants totally agree with the fracture indicators of water-saturated samples. The fracture energy of limestone treated with surfactant solutions decreases by 5-10% under positive temperatures and increases by 8-15% under negative temperatures as compared with the fracture energy of air-dried samples.
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