| 基于流固耦合动态模型的煤层钻孔成拱特性研究 |
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| 引用本文： | 韩颖,张飞燕,杨志龙,董博文.基于流固耦合动态模型的煤层钻孔成拱特性研究[J].煤炭科学技术,2019(5):77-81. |
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| 作者姓名： | 韩颖 张飞燕 杨志龙 董博文 |
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| 作者单位： | 河南理工大学能源科学与工程学院;中原经济区煤层(页岩)气河南省协同创新中心;深井岩层控制与瓦斯抽采国家安监局科技支撑平台;河南理工大学安全科学与工程学院;河南省瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地;铜川市耀州区煤炭管理局 |
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| 基金项目： | 国家自然科学基金资助项目(51404093);河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金项目(WS2012A09;WS2017B11;WS2017A01);河南省博士后科研资助项目(2017014);河南理工大学博士基金资助项目(B2008-15;B2012-093) |
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| 摘 要： | 为探讨煤层钻孔周围是否存在压力拱,构建了基于Hoek-Brown准则的含瓦斯煤流固耦合动态模型,并运用COMSOL软件进行解算,分析了钻孔施工前后孔周煤体主应力及应变能密度分布规律,研究了不同煤体结构煤层孔周煤体位移量及压力拱内边界、厚度的变化特征,并结合孔周煤体塑性区分布规律对煤层钻孔成拱特性进行了探讨。研究结果表明:煤层钻孔顶底部存在压力拱,其拱脚与拱座位于钻孔两侧;压力拱区域内孔周煤体水平位移量变化较为平缓;压力拱内边界及厚度可作为评判钻孔稳定性的指标,两者随地质强度指标GSI值的增大而逐渐减小,即煤体结构越完整、强度越高,压力拱范围越小;当GSI值非常大或非常小时,压力拱效应不明显,甚至趋于消失。
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| 关 键 词： | 含瓦斯煤 流固耦合模型 煤层钻孔 压力拱 地质强度指标 |
Research on characteristics of pressure arch around borehole in seam based on fluid-solid coupling dynamic model |
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| HAN Ying,ZHANG Feiyan,YANG Zhilong,DONG Bowen.Research on characteristics of pressure arch around borehole in seam based on fluid-solid coupling dynamic model[J].Coal Science and Technology,2019(5):77-81. |
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| Authors: | HAN Ying ZHANG Feiyan YANG Zhilong DONG Bowen |
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| Affiliation: | (School of Energy Science and Engineering,Henan PolytechnicUniversity,Jiaozuo 454000,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region(HenanProvince),Jiaozuo 454000,China;Technology Platform of Deep Mine Strata Control and Methane Drainage for State Administration of Work Safety,Jiaozuo 454000,China;College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Jiaozuo 454000,China;Coal Management Bureau of Yaozhou District,Tongchuan,Tongchuan 727031,China) |
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| Abstract: | HAN Ying;ZHANG Feiyan;YANG Zhilong;DONG Bowen(School of Energy Science and Engineering,Henan PolytechnicUniversity,Jiaozuo 454000,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region(HenanProvince),Jiaozuo 454000,China;Technology Platform of Deep Mine Strata Control and Methane Drainage for State Administration of Work Safety,Jiaozuo 454000,China;College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Jiaozuo 454000,China;Coal Management Bureau of Yaozhou District,Tongchuan,Tongchuan 727031,China) |
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| Keywords: | coal containing gas fluid-solid coupling model coalbedborehole pressure arch geological strength index |
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