Study on slope stability of deep-sea energy soil gas reservoir
Improper exploitation of deep-sea energy soil often leads to the deterioration of the strength of hydrate-bearing reservoirs and the instability of the seabed.In order to explore the impact of deep-sea energy soil mining on the slope stability of gas-bearing reservoir,this study took the mining conditions of deep-sea energy soil mining and backfilling devices as the actual engineering background to address the submarine landslide phenomena induced by energy soil mining and backfilling under three working conditions.Based on the finite element strength reduction method,a numerical model was first established.Then,the stability of hydrate gas-bearing reservoir caused by such factors as different clay contents,gas contents and backfill reinforcement was analyzed.Finally,the corresponding safety factor was obtained.The results show that the higher the clay content is,the lower the safety factor of the seabed sediment slope and the worse the slope stability become.The gas content has a nonlinear effect on the slope stability of the deep-sea energy soil gas reservoir,and the safety factor increases first and then decreases with the increase of the gas content.After backfilling and strengthening with cementitious materials,the safety factor of the submarine slope is improved and the slope stability is enhanced.
deep-sea energy soilgas-bearing reservoirstrength reduction methodslope stabilitysafety factor
万方数据
维普
