Study on the Mechanical Cumulative Damage Model of Slope Fault Fracture Zone under the Cumulative Effect of Blasting Vibration

Abstract

As for the slope with fault fracture zone, the fault fracture zone is the main sliding surface, whose shear strength parameter is the main calculation parameter of landslide occurrence. In this paper, shaking table model tests and damage theory were used to study the change of shear strength and mechanical cumulative damage model of fault fracture zone under the blasting vibration cyclic load. At first, the slope of Daye Iron Mine is selected as a case to study the shear strength weakening law of fault fracture zone by the similarity theory and the principle of the orthogonal test, in which the influence of the characteristics of vibration loading on the shear strength parameters of fault fracture zone with different thicknesses was studied. Secondly, by the assumption of Lemaitre strain equivalence and according to the extreme value characteristics of the normal stress-shear stress curve, the damage theory model of the fault fracture zone was reconstructed, and the microelement of fault was selected for analysis and divided into two parts, including damaged and undamaged materials. Finally, the results of the shaking table model tests were compared with the results of the shear cumulative damage model to verify the rationality of the theoretical model. Moreover, the predicted results of the theoretical model can better reflect the degradation trend of the fault fracture zone with the loading amplitude, normal stress, and loading times. It can be used as a reference for slope stability prediction under the action of cumulative static and dynamic loads.

[Retracted] Extraction of Spatial Distribution Characteristics of Jiangnan Urban Landscape under the Influence of Geomorphology

“…Whether it is natural landscape or cultural landscape, what it contains is the diversity of regional landscape. However, different people or groups may perceive and describe the same landscape completely differently, so it is a common study among Western scholars that the settlement landscape is conceived or "invented" by the perceiver, and the landscape is endowed with rich diversity and meaning in the process of being perceived, described, and displayed [12].…”

[Retracted] Analysis of the Spatial Distribution Pattern of the Urban Landscape in the Central Plains under the Influence of Multiscale and Multilevel Morphological Geomorphology

“…Besides, as digital tools are becoming increasingly closely integrated with the practice and research of landscape disciplines, this paper hopes to enrich its research content from the side of landscape patterns and deepen the research connotation of digital landscape studies. e study and analysis of landscape patterns used to play a pivotal role in urban site selection, residence phasing, and garden creation, while the current planning and design of cities and landscapes are paying increased attention to ecological sustainability and local characteristics [2]. is paper constructs a framework for digital analysis of multiscale landscape patterns to provide a certain degree of reference for how to conduct systematic analysis and how landscape patterns can provide support and strategies for subsequent planning and design [3].…”

Characteristics of Roof Collapse of Mining Tunnels in the Fault Fracture Zone and Distribution of the Boundary Force of the Accumulation Body

“…Combining the above two equations gives the area of the collapse area (shaded part in the Figure 3a) as follows S m = S t − S h − S 1 (14) The height of the accumulation body in the fault fracture zone is discussed as follows:…”

“…Reference [13], by comparing the deformation within the fault transfer zone, concluded that the fluid flow and permeability may be significantly enhanced when the fracture intensity is higher. In reference [14], a theoretical model was proposed to predict the degradation trend of shear strength of the fault fracture zone under cyclic dynamic and static loads. Reference [15] analyzed the collapse characteristics of a mining roadway in the fault fracture zone after a gas explosion, which was of guide value for the rescue work.…”