ANALYSIS OF FACTORS INFLUENCING THE SLIDING MECHANISM OF SLOPED ROOFS SUBJECTED TO STRIP LOADS USING NUMERICAL METHODS

Abstract

This paper investigates the influence of various factors on the slip mechanism of slopess under strip loading. Numerical simulation methods - limit equilibrium and finite element methods, based on the Mohr-Coulomb failure criterion are used to identify and evaluate factors such as slope angle, load intensity and distribution, as well as material properties. The objectives are to better understand the interaction among these factors and develop optimal design solutions in order to improve slope stability under complex loading conditions. To assess the accuracy between the two mentioned methods, the factor of safety (FS ≤ [FS]gh = 1.2) of the slope is compared when varying the slope angle β = 30° ÷ 90°, the ratio c/γB (B = 2m is the width of the strip load, c = 10 ÷ 35, γ=20kN/m³), and the load position λB = 0 ÷ 5B. Specifically:
 For β = 30°, if c/γB ≥ 0.375 at all positions λB, then FS>[FS]gh; for β = 45°, if c/γB ≥ 0.625 and λB ≤ 2B or c/γB ≥ 0.5 and λB ≥ 3B, then FS > [FS]gh and for β=60°, if c/γB ≥ 0.75 and λB ≥ 3B, the slope is stable.
In cases where β = 75° and β = 90°, for all values of c/γB and load positions λB, the factor of safety FS<[FS]gh=1.2, indicating that the slope does not meet stability conditions under natural conditions. In such scenarios, reinforcement measures are required to ensure slope stability.