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The Elastic-Plastic Finite Element Model of the Slope Stability Analysis and Application

Author: QiaoJinLi
Tutor: LiWenXiu
School: Hebei University
Course: Solid Mechanics
Keywords: Rock mechanics High steep rock slope Elastoplastic model Stability Analysis Safety factor
CLC: TU457
Type: Master's thesis
Year: 2005
Downloads: 631
Quote: 6
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Abstract


In this paper, high and steep rock slope stability analysis, slope stability analysis to establish the elastic-plastic finite element model , and using Drucker-Prager yield criterion , computational analysis using ANSYS software as a tool for plant and dam high and steep rocky pit slope stability of the specific analysis. For comparison, this paper analyzes the slope calculation takes into account the following two conditions : 1. Containing faults in groundwater and slope stability under dynamic action blasting . (2) without fault in groundwater and slope stability under dynamic action blasting . The above two cases and only consider the slope stability under the influence of gravity were compared and analyzed . The results showed that after excavation , slope resulting displacement, deformation , stress , strain are in line with the general law , embodied the following aspects : 1. Displacement field showing a large upper slope , the lower small . (2) stress and strain fields in the lower part of the slope and faults at the border there was a clear focus . 3 plastic strain at the boundary slope and faults in very concentrated, particularly in gravity , groundwater and blasting dynamic slope under the action of the fault occurs at a very significant plastic strain , almost through the phenomenon . In this paper, strength reduction finite element method to calculate the safety factor , by comparing the following conclusions : 1. Containing faults slope slope with no faults compared to the former than the latter safety factor safety factor small , under the same conditions , the latter is to stabilize the whole , indicating the presence of faults for the stability of a slope itself plays a very important role. (2) In the same slope under its own weight only consider the safety factor of the largest in the blasting dynamic stability safety factor under the influence , followed in considering the blasting power and groundwater under the influence of the minimum safety factor , the results indicate that groundwater and production blasting power greater impact on slope stability , can not be ignored objective factors. According to the calculation results of the analysis can predict : plant and dam in the ongoing open-pit mining process may still lead to local landslides , and thus in the process of safety management , rock slope deformation monitoring is extremely important, especially for the slope near the fault intrusion monitoring but also to attract attention.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Rock ( rock ) mechanics and rock testing > Rock stability analysis
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