Amplification phenomenon and mechanism analysis of ground fissure activity rate in Jiaocheng fault

Abstract Jiaocheng fault ground fissure is the longest extending intermittently in Fen Wei depression zone. The occurrence and development of fissures are affected by rainfall, groundwater pumping, activity, strata other factors. research shows that with rainwater flowing down replenishing confined water layer, there will be undercutting, scouring hollowing, which aggravate fissures; In structural area, due to multi-stage activity fault, a strong tensile stress area formed, resulting rapid reactivation, expansion rebirth fracture. At same time, thicker finer silty clay layer easier lose water, another incentive factor for However, when tectonic action causes dislocation aquifer resisting blocks loss formation materials, fracture its conditions. main controlling shaping, formation, continuous influence geological environment fracture, while precipitation, exploitation natural discharge factors, stratum material necessary condition. North basin Tianzhuang cannot form without