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Lü Yong, WANG Yu, GAN Fu-ping, JIANG Zhong-cheng, DU Yu-chao, YANG Qi-jun, WANG Ting, FAN Lu-zhou, YANG Tai. 2012: Hydrogeological and engineering geological characteristics of Mangbang Formation soft rocks in Mangshi basin, western Yunnan Province: a case study of the Mangjiu coal mine. Geological Bulletin of China, 31(2-3): 382-388. DOI: 10.12097/gbc.2012020322
Citation: Lü Yong, WANG Yu, GAN Fu-ping, JIANG Zhong-cheng, DU Yu-chao, YANG Qi-jun, WANG Ting, FAN Lu-zhou, YANG Tai. 2012: Hydrogeological and engineering geological characteristics of Mangbang Formation soft rocks in Mangshi basin, western Yunnan Province: a case study of the Mangjiu coal mine. Geological Bulletin of China, 31(2-3): 382-388. DOI: 10.12097/gbc.2012020322
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Hydrogeological and engineering geological characteristics of Mangbang Formation soft rocks in Mangshi basin, western Yunnan Province: a case study of the Mangjiu coal mine

  • Institute of Karst Geology, CAGS,Guilin 541004,Guangxi,China;2. Guilin University of Technology,Guilin 541004,Guangxi,China;3. Yunnan Institute of Geological Environmental Survey, Kunming 650051,Yunnan,China;4. Yunnan 199 Coal Field Geological Team,Chuxiong 650000, Yunnan,China

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  • The Mangshi basin is a continental sedimentary basins formed on the tectonic background of episode II of Himalaya Movement, with the primary filling substance being the river-lacustrine sedimentary system of Mangbang Formation. According to mining and drilling data, the engineering geological consolidation classification of Mangbang Formation is semi-soft rock, which can be divided into sandstone-sandy conglomerate soft rock group, siltstone weak rock group and carbonaceous mudstone-coal weak rock group. The coal seam is of low ash (15%-25%), low sulfur (0.5%-2.5%), semi-dark-half light brown type, and there exists a certain degree of self-ignition, The strength of the rock groups are in order of Psand-gravel
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