| 保护层开采上下被保护煤层卸压效应研究 |
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| 引用本文： | 毕业武,梁冰. 保护层开采上下被保护煤层卸压效应研究[J]. 煤, 2011, 20(5). DOI: 10.3969/j.issn.1005-2798.2011.05.004 |
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| 作者姓名： | 毕业武 梁冰 |
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| 作者单位： | 1. 黑龙江科技学院安全工程学院,黑龙江哈尔滨,150027
2. 辽宁工程技术大学,力学与工程科学系,辽宁,阜新,123000 |
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| 摘 要： | 采用FLAC3D对保护层开采围岩应力分布进行了数值模拟,得出保护层开采围岩卸压特征和上下被保护层倾向卸压范围。结果表明:在倾斜剖面中保护层采空区上方中部偏上区域围岩卸压效果最好,保护层上方采动影响范围沿保护层法线方向可达60 m左右,保护层下方采动影响范围沿保护层法线方向可达40 m左右,保护层对上被保护层上部影响角为75°,下部影响角为48°,保护层对下被保护层上部影响角为60°,下部影响角为42°,研究结果可为矿井煤与瓦斯突出防治工作提供科学依据。
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| 关 键 词： | 保护层开采 卸压效应 应力分布 数值模拟 煤与瓦斯突出 |
Research on Pressure-relief Effect of upper and Lower Protected Seam with Protective Seam Mining |
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| BI Ye-wu,LIANG Bing. Research on Pressure-relief Effect of upper and Lower Protected Seam with Protective Seam Mining[J]. Coal, 2011, 20(5). DOI: 10.3969/j.issn.1005-2798.2011.05.004 |
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| Authors: | BI Ye-wu LIANG Bing |
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| Affiliation: | BI Ye-wu1,LIANG Bing2(1.Safety Engineering College,Heilongjiang Science and Technology Institute,Harbin 150027,China,2.Department of Mechanics and Engineering Sciences,Liaoning Technical University,Fuxin 123000,China) |
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| Abstract: | A number of numerical simulation tests were carried out using the numerical analysis code FLAC3D to investigate stress distribution of surrounding rock of protective seam.Obtaining the pressure-relief characteristics and scope of pressure-relief of upper and lower protected seam along the tilt direction.The results show that the best pressure-relief zone is located at above middle partial upper position of goaf along the tilt direction,mining influence range above protective seam reaches 60m approximately a... |
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| Keywords: | protective seam mining pressure-relief effect stress distribution numerical simulation coal and gas outburst |
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