近直立巨厚煤层覆岩活动规律及支架工作阻力研究

发布时间：2018-06-05 04:37

本文选题：近直立巨厚煤层 + 散体结构　；参考：《煤炭科学技术》2017年05期

【摘要】：为研究近直立巨厚煤层开采覆岩活动规律,指导近直立巨厚煤层开采实践及支架选型,基于相似材料物理模拟试验,建立了覆岩呈散体结构的"支架-围岩"相互作用力学模型,得到支架工作阻力的计算式。研究结果表明:在大尺寸开采空间和多次分层重复扰动影响下,覆岩块体将呈现"散体"结构状;工作面支架所承受的载荷为上覆岩层自然平衡拱内松散岩体自重,支架的支护阻力不仅与支架宽度、控顶距及松散岩体抗压强度有关,还与工作面长度相关,且随着煤层工作面长度的增加呈线性增加。结合工程实例,验证了理论推导的合理性,研究成果对于分析近直立巨厚煤层的支架工作阻力,合理选择支架具有重要的工程意义。
[Abstract]:In order to study the law of overburden activity in mining near vertical thick coal seam and guide mining practice and support selection in near vertical thick coal seam, the physical simulation test of similar material is used. A mechanical model of "support-surrounding rock" interaction is established, and the formula of working resistance of the support is obtained. The results show that under the influence of large mining space and multiple stratification and repeated disturbance, the overlying rock mass will appear as a "scattered body" structure, and the load of the working face support is the natural balance of the overburden rock mass in the arch. The support resistance of the support is not only related to the support width, roof control distance and the compressive strength of loose rock mass, but also to the working face length, and increases linearly with the increase of the coal face length. The rationality of the theoretical derivation is verified by an engineering example. The research results have important engineering significance for analyzing the working resistance of the support in the near vertical thick coal seam and reasonably selecting the support.
【作者单位】：贵州理工学院矿业工程学院;中国矿业大学物联网研究中心;中国矿业大学矿业工程学院;新疆大学地质与矿业工程学院;煤科集团沈阳研究院有限公司;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2015CB251600) 国家自然科学基金资助项目(51474206,51404254) 贵州省科学技术基金资助项目(黔科合J字[2015]2072号) 贵州省教育厅自然科学研究资助项目(黔教合KY字(2015)427号)
【分类号】：TD325;TD350

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