Effect of Chemical Corrosion and Axial Compression on the Dynamic Strength Degradation Characteristics of White Sandstone under Cyclic Impact

Both chemical corrosion and axial compression impose critical influences on the internal microstructure of rock. Meanwhile, can change a rock’s mineral composition, which in turn affects physical mechanical properties To investigate dynamic strength characteristics white sandstone under coupling effect load corrosion, static combined loading test device was adopted for performing cyclic impact tests immersed solution. The results show that with increasing number cycles same load, peak rock presented trend ‘strengthening first then weakening’. resistance to failure reached its maximum when solution pH 7 pressure 12.6 MPa. Under pressure, initial is normal distribution. Acidic alkaline environments are harmful rocks during impact, while neutral exert little particle size crushing particles. In addition, has significant deterioration process inconspicuous later period.