| 急倾斜煤层防水煤柱合理尺寸的理论分析 |
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| 引用本文： | 徐斌,董书宁,徐艳玲. 急倾斜煤层防水煤柱合理尺寸的理论分析[J]. 矿业科学学报, 2017, 2(4): 307-315 |
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| 作者姓名： | 徐斌 董书宁 徐艳玲 |
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| 作者单位： | 1.中国矿业大学(北京)地球科学与测绘工程学院,北京100083;2.煤炭科学研究总院西安研究院,陕西西安710054;3.中国人民解放军后勤工程学院,重庆401311 |
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| 基金项目： | 国家自然科学基金(51074075,41072188);“十二五”国家科技支撑计划(2012BAK04B04);国家留学基金委高水平公派研究生项目 |
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| 摘 要： | 根据深部急倾斜煤层工作面开采方式、积水位置的不同组合,将防水煤柱留设分成三种常见模式,并分析了每一种模式煤柱留设的主要依据;运用块体极限平衡理论建立急倾斜煤层失稳力学模型,推导出煤柱区段稳定尺寸的计算公式;针对不同矿区的具体条件,提出急倾斜防水煤柱留设合理尺寸的优化体系.将优化设计的理论运用于唐山某矿,得出防水煤柱留设合理高度为59.3m,而该矿在防水煤柱高度60m的条件下实现安全试采,说明优化设计理论具有工程实践指导作用.
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| 关 键 词： | 急倾斜煤层 防水煤柱 优化设计 块体极限平衡法 |
| 收稿时间： | 2016-11-10 |
Waterproof pillar size design in steep coal seam |
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| Affiliation: | 1.College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;2.China Coal Research Institute,Xi'an Research Institute,Xi'an Shaanxi 710054,China;3.Logistic Engineering University of PLA,Chongqing 401311,China |
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| Abstract: | According to different combinations of mining methods and water body positions in deep coal seam,three basic structural patterns were created and main basis of setting up reasonable waterproof coal pillar size for each pattern were proposed.The mechanics model of the stability of waterproof pillar was established,and formulas for critical value of stable length of waterproof pillar were derived.Based on different conditions for each coal mine,the optimization design theory on setting up reasonable waterproof coal pillar size was proposed.The above optimization design theory was applied to a mine in Tangshan.Results showed that the reasonable size of waterproof pillar could be 59.3m.Actually the steep mining face was safely and successfully exploited with 60m height of waterproof pillar,indicating that the theory could be useful for practical projects. |
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