Abstract
This paper is devoted to improve the containment capacity of the Hesgoula south dumping site. The general geology of the dumping site was obtained through geological surveys. Physico-mechanical properties of silty clay and bedrock layers that have a large impact on the stability of the dump were measured by direct shear tests and triaxial tests in laboratory. Then ultimate bearing capacity of the substrate were analyzed and calculated. This paper proposed three capacity expansion and increase plans and used GeoStudio software for comparison. Through computation of the stability of the dump site slope after capacity expansion and increase for each plan, the capacity expansion plan was determined. The capacity expansion and increase plan will solve the problem of the current insufficient containment capacity of the Hesgoula south dumping site, which is of great significance for saving mine transportation costs, improving work efficiency, and reducing grassland occupation.
Highlights
In recent years, open-pit mining technology has developed rapidly (Nolan and Kecojevic 2014; Long et al 2018; Ozdemir and Kumral 2019)
This paper proposed three capacity expansion and increase plans and used GeoStudio software for comparison
The capacity expansion and increase plan will solve the problem of the current insufficient containment capacity of the Hesgoula south dumping site, which is of great significance for saving mine transportation costs, improving work efficiency, and reducing grassland occupation
Summary
Open-pit mining technology has developed rapidly (Nolan and Kecojevic 2014; Long et al 2018; Ozdemir and Kumral 2019). Poulsen et al (2014) analyzed the stability of the dumping site based on the limit equilibrium method and continuous media and found that when the strength of the basement is weak, the basement plays a leading role in the stability of the dumping site. Ding (2017) optimized the slope parameters of the Antaibao open-pit mine dump to increase capacity, proposed an expansion and increase plan for the impact of anticline structures, and analyzed the method of bearing capacity and limit equilibrium of the basement. Zhou (2016), based on the theoretical analysis of the stability of the internal slope of the dumping site of the Harwusu open-pit mine at different stages, used the limit equilibrium theory to obtain the stability coefficients of the four main positions, and analyzed the increase plan. Slope stability of increasing height and expanding capacity of south dumping site of Hesgoula coal
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