Abstract
Purpose. To analyze the coupling effect between composite slope geometrical parameters. Methods. The slope angle and excavation depth are coupled with load which is waste dump in this case. Several models were created and analyzed to capture their coupling effect and interactions using FLAC/Slope. Findings. When the slope angle and excavation depth are coupled with a load such as that of a waste dump, the factor of safety decreases. But a suitable dumping position can prove vital to enhancing stability. The primary cause of this phenomenon is that the stresses induced by the waste dump decrease as the dump is moved away from the crest of the slope and the stress induced within the zone of active wedge beneath the dump reduces on the reference slip plane. Hence, it can be said that the position of the waste dump in the formation of a composite slope plays a key role in enhancing stability. Factor of safety have the same influence pattern for all parameters induced by stress as that of influence rule. The results obtained from the finite element stress analysis are the same with those obtained for the slope stability analysis. Originality. The current research presents for the first time the coupling effect of the composite slope geometrical parameters and the results of finite element stress analysis, which are similar to those of slope stability analysis. Practical implications. The current research results can be used to effectively analyze and design the composite slopes in soft rocks specially in surface mines.
Highlights
Slop stability is extremely important in surface structures constructed in or/on the rocks such mines, dams, roads
The general trend obtained from the analysis results is such that the excavation depth has an inverse relationship to the factor of safety
A rule of thumb can be drawn from the assertion made in order to improve stability within any given surface mines that is deep excavation should be created with lower slope angles and steep slope angles with shallower excavation depths
Summary
Slop stability is extremely important in surface structures constructed in or/on the rocks such mines, dams, roads. Different researchers have worked on the slope stability analysis. Composite stability is important specially in coal mines. Coupling effect of composite slope stability analysis with special focus on surface mine stability is of prime interest. The stability of structures in or/on the rocks are extremely important and if proper design parameters and approaches are not adopted causes disasters which are both dangerous for workers, structures and loss of production [1]-[4]. Different researchers have worked on the slope stability of soft rocks. Finite element analysis has been widely used for the stability of rock slopes. It was shown that how such procedures can be utilized in conventional FEM context.
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