CHARACTERISTICS AND MECHANISM STUDY OF CONSEQUMENT FAULT TOPPLING UNDER THE OPEN-PIT MINING CONDITION

The toppling of the rock slope most have anti dip layered structure, the typical structural feature of the reversal incline slope is that the rock layer and the slope surface are coincident with the strike and but they have opposite dip. It's more likely to happen with different toppling failure if there are one or more sets of joints whose strike is the same as the slope cut the rock into discrete blocks. This paper combined the engineering geological condition of Longshou Mine and used the soft material small model to study the toppling caused by the open-pit mining at its body force condition of self-weight. The results show that the existence of fault destroyed the continuity of the rock mass, increased flexibility of rock mass and significantly reduces the deformation modulus of rock mass. The consequent fault located in the compression zone gets a lot of lateral force owing to the large deformation, and when the lateral force is greater than the physical component of the fault rock mass self-weight in the direction of the lateral force, it will toppling with wide-angle and reversal.