Potential Slip Surface and the Key Units Failure Path of Slope with Weak Interlayer

To investigate the slip mechanism of the slope with weak interlayer, the location of the weak interlayer within the slope was determined by on-site monitoring using the Hequ open pit mine as the engineering background, and a three-dimensional numerical model was established based on this, and the study of the potential slip surface and key units of the slope containing weak interlayer was carried out. The potential slip surface inside the slope with weak interlayers is determined from the perspective of displacement contour and maximum shear strain increment. The principle and method of key unit identification for the slope with weak interlayer is proposed. The initial key unit on the potential slip surface of the slope with weak interlayers is identified, and the dynamic breaking path of the key unit on the potential slip surface of the slope with weak interlayers is determined.