| 采场底板突水的跨层应力壳力学模型 |
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| 引用本文： | 张文忠,黄庆享.采场底板突水的跨层应力壳力学模型[J].西安科技大学学报,2011,31(6). |
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| 作者姓名： | 张文忠 黄庆享 |
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| 作者单位： | 1. 西安科技大学能源学院,陕西西安 710054;煤炭科学研究总院西安研究院,陕西西安 710054
2. 西安科技大学能源学院,陕西西安,710054 |
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| 基金项目： | 国家自然科学基金，陕西省科技厅社发攻关项目，榆林市产学研合作项目，陕西省教育厅重点实验室研究计划项目 |
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| 摘 要： | 利用实验室大型非线性三维计算机数值模拟对煤层底板应力分布特征进行了深入研究,发现采场底板存在由集中应力形成的跨层应力壳,应力壳是承载上覆岩体压力的临时结构,壳基是椭球应力壳应力较集中的区域,椭球应力壳的形态及应力集中情况与采场结构有关.根据数值模拟试验得出了应力壳的形态方程,分析了跨层应力壳壳基、壳肩及壳顶的失稳模式,指出壳肩处经历联合破断,底板的最大破断深度则处于壳肩的位置,当壳肩达到最大破坏深度,采动裂隙和原始导升裂隙贯通,此时则容易形成突水；壳顶则随着高度的不断发展,跨层应力壳形成一个处于半封闭状态的半壳结构,此时采动裂隙导通煤层底板含水层,从而形成突水.
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| 关 键 词： | 跨层应力壳 采场结构 底板突水 围岩 结构失稳 |
Cross-layer stress shell mechanical model of water-inrush from coal seam floor |
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| ZHANG Wen-zhong,HUANG Qing-xiang.Cross-layer stress shell mechanical model of water-inrush from coal seam floor[J].JOurnal of XI’an University of Science and Technology,2011,31(6). |
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| Authors: | ZHANG Wen-zhong HUANG Qing-xiang |
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| Institution: | ZHANG Wen-zhong1,2,HUANG Qing-xiang1(1.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China,2.Xi'an Branch of China Coal Research Institute,China) |
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| Abstract: | The nonlinear three-dimensional computer laboratory simulation of stress distribution features on the coal floor is researched and found that there is mining floor formed by the concentrated stress cross-layer stress shell,the stress load on the shell is the pressure of overlying rock temporary structures,the stress ellipsoid shell base is more concentrated stress area,and the stress ellipsoid shell morphology and stress concentration is related to structure of the mining field.According to the numerical si... |
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| Keywords: | stress cross-layer stress shell structure of mining field water-inrush from seam floor surrounding rock structural instability |
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