| Analysis of Water Insulating Effect of Compound Water-Resisting Key Strata in Deep Mining |
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| 作者姓名： | FENG Mei-mei MAO Xian-biao BAI Hai-bo MIAO Xie-xing |
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| 作者单位： | School of Sciences, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;中国矿业大学校科研和教改项目 |
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| 摘 要： | The problem of water preservation in mining and the prevention of water-bursts has been one of the more important issues in deep mining. Based on the concept of water-resisting key strata, the mechanics model of the key strata is established given the structural characteristics and the mechanical properties of the roof rock layers of the working face in a particular coal mine. Four other models were derived from this model by re-arranging the order of the layers in the key strata. The distribution characteristics of stress, deformation, pore pressure and the flow vector of all the models are computed using the analytical module of fluid-structure interaction in the FLAC software and the corre- sponding risks of a water-burst are analyzed. The results indicate that the water-insulating ability of the key strata is related to the arrangement of soft and hard rocks. The water-insulating ability of the compound water-resisting key strata （CWKS） with a hard-hard-soft-hard-soft compounding order is the best under the five given simulated conditions.
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| 关 键 词： | 矿山 地质 深矿 数值模拟 机械分析 水爆 |
| 收稿时间： | 2006-08-21 |
| 修稿时间： | 2006-11-20 |
Analysis of Water Insulating Effect of Compound Water-Resisting Key Strata in Deep Mining |
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| FENG Mei-mei MAO Xian-biao BAI Hai-bo MIAO Xie-xing.Analysis of Water Insulating Effect of Compound Water-Resisting Key Strata in Deep Mining[J].Journal of China University of Mining and Technology,2007,17(1):1-5. |
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| Authors: | FENG Mei-mei MAO Xian-biao BAI Hai-bo MIAO Xie-xing |
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| Affiliation: | School of Sciences, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China |
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| Abstract: | The problem of water preservation in mining and the prevention of water-bursts has been one of the more important issues in deep mining. Based on the concept of water-resisting key strata, the mechanics model of the key strata is established given the structural characteristics and the mechanical properties of the roof rock layers of the working face in a particular coal mine. Four other models were derived from this model by re-arranging the order of the layers in the key strata. The distribution characteristics of stress, deformation, pore pressure and the flow vector of all the models are computed using the analytical module of fluid-structure interaction in the FLAC software and the corresponding risks of a water-burst are analyzed. The results indicate that the water-insulating ability of the key strata is related to the arrangement of soft and hard rocks. The water-insulating ability of the compound water-resisting key strata (CWKS) with a hard-hard-soft-hard-soft compounding order is the best under the five given simulated conditions. |
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| Keywords: | deep mining water-resisting key strata fluid-structure interaction numerical simulation mechanical analysis |
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