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Stability Assesment of the Slope at the Disposal Site of Waste Rock in Limestone Mine  

Lee, Sang-Eun (강원대학교 삼척캠퍼스 에너지자원공학과)
Jang, Yoon-Ho (강원대학교 삼척캠퍼스 에너지자원공학과)
Publication Information
Tunnel and Underground Space / v.20, no.6, 2010 , pp. 475-490 More about this Journal
Abstract
The analysis of slope stability was performed from seven sites among total eleven sites of waste rock which are divided into two objects (mullock-pile and rock mass) according to the location of dumping-dropping point in L limestone Mine. The analysis of circular failure using Bishop's simplified method and the finite element method for mullock-pile slopes were adopted. For rock mass slopes, identification of failure modes on stereonet projection was determined, thereby limit equilibrium analysis was applied to obtain the safety factor of slopes and the finite element method was used to understand overall behavior of slope. Phi-c reduction method was used to calculate the safety factor of slopes through the finite element method. In mullock-pile slope of zone D and rock slopes of zone F and G, the assurance of slope stability was difficult, and the plans to assure the stability of slopes were proposed on the basis of the analysis of slopes at disposal sites of waste rock. Therefore, the method of piling with waste rock by dozer pushing after dumping for mullock-pile slope of zone D is required, and the method of piling after moving to the place which has no fault zone for rock slope of zone F and G is recommended.
Keywords
Waste rock; Finite element method; Stereonet projection; Limit equilibrium; Safety factor; Phi-c reduction method;
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