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Stability Assessment of Underground Limestone Mine Openings by Stability Graph Method  

Sunwoo Choon (한국지질자원연구원 지반안전연구부)
Jung Yong-Bok (한국지질자원연구원 지반안전연구부)
Publication Information
Tunnel and Underground Space / v.15, no.5, 2005 , pp. 369-377 More about this Journal
Abstract
The stability of underground openings is a major concern for the safety and productivity of mining operations. Rock mass classification methods provide the basis of many empirical design methods as well as a basis for numerical analysis. Of the many factors which influence the stability of openings, the span of the opening for a given rock mass condition provides an important parameter of design. In this paper, the critical span curves proposed by Lang, the Mathews stability graph method and the modified critical span curve suggested by the authors have been assessed. The modified critical span curve was proposed by using Mathews stability graph method. The modified critical span curve by the author have been used to assess the stability of underground openings in several limestone mines.
Keywords
Rock mass classification; Stability of underground opening; Critical span curve; Mathews stability graph;
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