Characteristics and implications of stress state in a gold mine in Ludong area, China
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第12期
论文作者：Peng Li Mei-feng Cai Qi-feng Guo Sheng-jun Miao
文章页码：1363 - 1372
摘 要：In this study, we obtained information from twenty-one measurement points on the stress magnitudes and orientations of a gold mine in the Ludong area. We used the overcoring technique with an improved hollow inclusion strain gauge and then analyzed the distribution characteristics of the in situ stress field. The results indicate that the stress field is characterized by σH > σh > σv and σH > σv > σh（where σH, σh, and σv are the maximum horizontal, minimum horizontal, and vertical principal stresses, respectively）. The regional stress field is dominated by horizontal principal stress. The σH, σh, and σv values show a gradual increasing trend with depth. The σH is predominantly oriented in the NWW–SEE or near-EW direction. We also confirmed the correspondence between the measured stress field and the regional geological structure. In addition, based on the measured stress data, we discuss the implications of the in situ stress with respect to fault activity in the mine area.
Peng Li1,2,3，Mei-feng Cai1,2,3，Qi-feng Guo1,2,3，Sheng-jun Miao1,2,3
1. School of Civil and Resource Engineering, University of Science and Technology Beijing2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China), University of Science and Technology Beijing3. Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing
摘 要：In this study, we obtained information from twenty-one measurement points on the stress magnitudes and orientations of a gold mine in the Ludong area. We used the overcoring technique with an improved hollow inclusion strain gauge and then analyzed the distribution characteristics of the in situ stress field. The results indicate that the stress field is characterized by σH > σh > σv and σH > σv > σh（where σH, σh, and σv are the maximum horizontal, minimum horizontal, and vertical principal stresses, respectively）. The regional stress field is dominated by horizontal principal stress. The σH, σh, and σv values show a gradual increasing trend with depth. The σH is predominantly oriented in the NWW–SEE or near-EW direction. We also confirmed the correspondence between the measured stress field and the regional geological structure. In addition, based on the measured stress data, we discuss the implications of the in situ stress with respect to fault activity in the mine area.
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