Development of a preliminary slope stability calculation method based on internal horizontal displacements

2018 ◽  
Vol 15 (5) ◽  
pp. 1129-1136 ◽  
Author(s):  
Hua-fu Pei ◽  
Si-qi Zhang ◽  
Lalit Borana ◽  
Bing Yuan
Keyword(s):  
Slope Stability ◽  
Calculation Method ◽  
Stability Calculation ◽  
Horizontal Displacements

scholarly journals Slope stability calculation method for highwall mining with open-cut mines

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Juyu Jiang ◽  
Ye Lu ◽  
Dong Wang ◽  
Xinping Han
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Calculation Method ◽  
Coal Pillar ◽  
Time Varying ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Stability Calculation ◽  
Target Time ◽  
Highwall Mining

AbstractSlope stability is a prominent problem for the efficient application and promotion of highwall mining technology, especially when mining residual coal under high and steep end-slope conditions. This study proposes the concept of target time pillar strength based on the required coal pillar service time. Creep tests were performed to measure the time-varying properties of coal shear strength parameters under different loads, and a time-varying function was established by regression. The highwall mining length is divided into three categories based on discontinuous structural plane theory, including goaf, yielding, and elastic zones, all of which are considered to have resistances against shear stress. The basal coal seam is prone to weakening owing to the weight of overlying strata, which may shift the slope failure mode from circular to sliding along the weak layer. Numerical modeling was used to study the influence of the bearing stress and target time strength on the development of the yielding zone at the coal pillar ribs. The coefficients of the three zones were determined, and the temporal and spatial evolution patterns of the shear strength parameters of the weak layer were acquired. A slope stability calculation method is proposed based on rigid body-limit equilibrium theory that can quantify the influence of highwall mining operations on slope stability, which is significant for popularizing highwall mining technology.

scholarly journals Stability Analysis of Double V-shaped Gully Embankment: A Dimension-reduced Calculation Method

2021 ◽  
Author(s):  
Yun Que ◽  
Xianyong Chen ◽  
Yanyu Chen ◽  
Zhenliang Jiang ◽  
Yonghui Qiu ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Safety Factor ◽  
Calculation Method ◽  
Spatial Effect ◽  
Mountainous Area ◽  
Stability Calculation ◽  
Accuracy Requirement ◽  
Technical Requirements

The slope stability is generally analyzed by a 2D method, ignoring the spatial effect (SE), which no longer meets the evaluation accuracy requirement. This problem is particularly prominent for the embankment built on the double V-shaped gully (E-DVSG), which is a typical but unique topography in the mountainous area. Moreover, the technical requirements for engineers will increase sharply if a 3D slope stability calculation method is adopted. To tackle this issue, pragmatically, a dimension-reduced slope stability analysis method (DR-SSAM) considering the SE of the E-DVSG was proposed and verified by a case study. Specifically, the DR-SSAM obtained the 3D safety factor of the E-DVSG by using the spatial effect curves and the safety factor from the 2D model. The results showed that the method was rational and efficient for engineering applications. Besides, the SE generation mechanism and condition along with its influences resulted from the major factor were addressed thoroughly.

Influence Analyzing of Slope Stability with Setting of Crushing Station in Semi-Continuous Technology

2011 ◽  
Vol 354-355 ◽  
pp. 98-103
Author(s):  
Hong Ge Peng ◽  
Qing Xiang Cai ◽  
Wei Zhou ◽  
Ji Sen Shu ◽  
Guo Ji Li
Keyword(s):  
Slope Stability ◽  
Calculation Method ◽  
Mining System ◽  
Field Practice ◽  
Variation Curve ◽  
Transportation Distance ◽  
Continuous Mining ◽  
Continuous Technology ◽  
Economy Benefit ◽  
Station Location

According to the analysis of the semi-continuous mining system with crushing station set on end-slope and the relation with working wall and non working wall, the calculation method of uncovered end-slope area and the coefficient of slope stability was elicited, considering the external load caused by crushing station location. The variation curve and the law of stability coefficient were also obtained. Combining the field practice, the research conclusion indicates that the crushing station setting of semi-continuous mining system would affect not only the truck transportation distance and the economy benefit, but also the slope stability, which can be used as the theory support to the setting of crushing station in semi-continuous mining system.

scholarly journals Landslide Sustainability Report on R. Gogiashvili Street in Tbilisi Using GEO5 Program

2021 ◽  
pp. 185-191
Author(s):  
Niko Poporadze ◽  
Keyword(s):  
Slope Stability ◽  
Computer Programs ◽  
Stability Calculation ◽  
Correct Method ◽  
Sustainability Report

The slope stability calculation is quite time-consuming, which requires first selecting the correct method and then calculating the coefficient of stability using different formulas. It should also be noted that visualization of the analysis results requires a great deal of time, which is quite impractical. To solve this problem, many geotechnical computer programs have been created, which can be used to report slope stability reports in a split of a second. The most common geotechnical software in Georgia is GEO5 slope stability, which allows us to calculate slope stabilities very quickly and effectively with various methods and standards.

scholarly journals Peningkatan Stabilitas Lereng pada Ruas Jalan Tawaeli – Toboli dengan Vegetasi/Bioengineering

2021 ◽  
pp. 23-32
Author(s):  
S.A. Wandira ◽  
A. Rahayu
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Safety Factor ◽  
Friction Angle ◽  
Soil Samples ◽  
Plant Roots ◽  
Soil Conditions ◽  
Mountainous Area ◽  
Stability Calculation ◽  
The Road

Tawaeli - Toboli is one of the road that often undergo landslide. Most of these roads are in a mountainous area with high steep slopes and poor soil conditions. The road conditions worsened, especially in rainy season resulting the citizen do not know anywhere that is prone to landslides such as in Km 16 to 17. The purpose of this study was to analyze slope stability using bioengineering methods, determine the shear strength of soil without plant roots and soil with plant roots and to determine the potential for landslides that will occur. Bioengineering is used to increase the strength of the soil, and stabilize slopes and reduce erosion on slopes. The slope stability calculation using the Bishop slice method. The calculating of safety factor analyzed using the Slope / W application and manually. Soil samples were taken from 3 (three) points and the soil strength parameters,  soil cohesion and friction angle, were obtained through laboratory testing. Tests were carried out using rootless and rooted soil samples. In addition, direct field observations were made to obtain slope angles and slope heights. The results showed that the parameters of soil shear strength, cohesion and friction angle increased with the presence of plant roots. The results of the slope stability analysis show that the conditions of the slope are stable at slope 1 (Km 16) and slope 3 (Km 17) with a safety factor greater than 1.5. While slope 2 (Km 16 +300) has the potential for landslides as a safety factor of less than 1.5. The use of bioengineering increases the safety factor to be greater than 1.5. The calculation of the value of the safety factor using the Slope / W program and the Bishop manual is not much different, but the calculation time with the Slope / W program is faster

scholarly journals Slope Stability Calculation Method of Highwall Mining with Open Cut Mines as an Example

2021 ◽  
Author(s):  
Juyu Jiang ◽  
Ye Lu ◽  
Dong Wang ◽  
Xinping Han
Keyword(s):  
Slope Stability ◽  
Recovery Rate ◽  
Limit Equilibrium ◽  
Coal Pillar ◽  
Time Dependent ◽  
Universal Method ◽  
Stability Calculation ◽  
Target Time ◽  
Highwall Mining ◽  
Overlying Strata

Abstract Highwall mining machines have been used to recover retained coal at the toe of highwalls and endwalls over the past few decades. However, there has not been a universal method to evaluate the slope stability using highwall mining while maximizing the recovery rate. Based on the required service time of coal pillars, this study proposes the concept of the target time pillar strength. To obtain time-dependent parameters for the coal, time-dependent shear tests were performed on specimens from an open-cut mine in Inner Mongolia. The highwall mining length was divided into three categories based on discontinuous structural plane theory: goaf, yielding, and elastic zones. The three zones were considered to all have resistances against shear stress. The basal coal seam is likely to become weak due to weight from the overlying strata, which may change the slope failure mode from circular to sliding along the weak layer. Numerical modeling was used to study the influence of the overlying strata and target time strength on the yielding zone development at the coal pillar ribs. The coefficients of the three zones were determined and substituted into the Mohr-Coulomb equation to obtain the time-dependent shear strength parameters. Subsequently, the influence of highwall mining on the slope stability was evaluated using the rigid body-limit equilibrium method (LEM). The optimized coal pillar width is determined to maximize the recovery rate without compromising the slope stability.

scholarly journals Seismic impacts influence on the slope stability on the example of Abrau Peninsula (Russian sector of black sea coast)

2020 ◽  
Vol 157 ◽  
pp. 02022
Author(s):  
Mihail Kropotkin
Keyword(s):  
Slope Stability ◽  
Seismic Waves ◽  
Seismic Effects ◽  
Stability Calculation ◽  
Black Sea Coast ◽  
Russian Sector ◽  
Seismic Accelerations ◽  
The Stability ◽  
Seismic Impact ◽  
Seismic Impacts

Some aspects of seismic impact on the stability of massive seismogravitational solid masses are examined. An example of the slope stability calculation using separate accounting for seismic accelerations in blocks is shown. The influence of the relief on the change in seismic effects is considered. Some aspects of seismic impact on the stability of massive seismogravitational solid masses are examined. An example of the slope stability calculation using separate accounting for seismic accelerations in blocks is shown. The influence of the relief on the change in seismic effects is considered. The comparative impact of longitudinal and transverse seismic waves from the earthquake focuses located in front of the slope foot and behind the slope ridge is evaluated.

scholarly journals Slope stability analysis considering seepage and stress coupling under water level fluctuation

2021 ◽  
Vol 276 ◽  
pp. 01028
Author(s):  
Zhou YiLiang ◽  
Li Ming ◽  
Li ZiLong
Keyword(s):  
Slope Stability ◽  
Water Level ◽  
Factor Of Safety ◽  
Coupling Effect ◽  
Water Pressure ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Stability Calculation

The reservoir water level fluctuation is an important factor inducing the reaction of pore-water pressure, seepage and at last resulting in instability and failure of the slope. A typical homogeneous slope is conducted as an example in this paper, the seepage and stress coupling effect is considered, and the slope stability calculation and analysis are carried out by using the finite element stress method. The results demonstrate that the factor of safety increases with the reservoir water level rises, and then gradually changes from decrease to stabilization. It should be noted that the factor of safety decreases slightly during the initial stage of water level rising at the speed of 0.2 m/d, which the slope will probably lose its stability. On the other, the factor of safety changes from decrease to increase along with the reservoir water level drawdown, and then gradually tends to stabilization. There is a minimum factor of safety when the water level is at about 1/4 of the slope height, and the minimum factor of safety decreases with increasing drawdown speed, just as the factor of safety decreases from 0.83 to 0.73 when the drawdown speed is increased from 0.20 m/d to 5.0 m/d.

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