Influence of Stope Design on Stability of Hanging Wall Decline in Cibaliung Underground Gold Mine
- 1 1Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan 2Department of Geology Engineering, Mining Engineering Study Program, Hasanuddin University, Makassar, Indonesia
- 2 Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
- 3 Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
- 4 Department of Mining Engineering, Faculty of Mining and Petroleum Engineering, Bandung, Indonesia
- 5 Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
Abstract
Cibaliung Underground Gold Mine applies cut and fill mining method to optimize ore production and maintain underground stability. Existing 5 m × 5 m height and width of stope geometry has a potential new design to increase production of gold due to variety of thick ore, however serious shotcrete failure s often occur in hanging wall decline. This paper aims to find out the relationship between stope design and stability of hanging wall decline. The analysis conducted in this study is based on underground characteristics and geological condition of Cibaliung area. The impact of stope design on decline stability was analyzed by using numerical methods. The impact factors such as different rock mass, size of stope, and distance between stope and hanging wall decline were used in the analysis of underground stability especially stability on hanging wall decline.
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