Deterioration mechanism of mechanical properties of phosphorite under different saturation duration

In order to explore the deterioration mechanism of mechanical properties phosphate rock under different saturation time, degradation phosphoric samples duration was analyzed by laboratory test, theoretical analysis and neural network modeling, results is as follows: water will result in samples. The peak compressive strength strain decreased gradually with increase time. average 12, 24, 36 h saturated specimens 8.6%, 21.1%, 32.2% lower than that natural specimens, 5.9%, 13.9%, 31.3% lower, respectively. stress-strain curves for have more jitter stages after peak, indicating plastic characteristics be increased a long method used analyze test parameters samples, action confining pressure were obtained. model established represent accuracy 0.89. can predict verify other conditions limited region. research provide reference water-rich roadway.