| 煤巷顶板软弱夹层层位对锚杆支护结构稳定性影响 |
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| 引用本文： | 张农,李桂臣,阚甲广.煤巷顶板软弱夹层层位对锚杆支护结构稳定性影响[J].岩土力学,2011,32(9):2753-2758. |
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| 作者姓名： | 张农 李桂臣 阚甲广 |
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| 作者单位： | 中国矿业大学矿业工程学院,江苏徐州221116;中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 |
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| 基金项目： | 国家自然科学基金青年科学基金资助项目(No.50904064); 江苏高校优势学科建设工程资助项目; 中央高校基本科研业务费专项资金资助(No.2010QNA29); 煤炭资源与安全开采国家重点实验室(中国矿业大学)自主研究课题(No.SKLCRSM09X03) |
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| 摘 要： | 中国煤矿开采条件复杂,煤层顶板多为分层性强的复合顶板,含有软弱夹层时采用锚杆支护技术难度大、安全可靠性低。根据煤巷顶板软弱夹层和锚固区的相对位置,采用物理模拟方法研究了三种软弱夹层层位条件下顶板的采动失稳特征和破坏型式,提出了包括锚杆支护承载性能强化、巷道破裂围岩体强度强化和围岩承载结构强化的巷道围岩强化控制原理;在应用安全因子AQ对顶板安全可靠性进行分级评估基础上,给出对应于不同顶板软弱夹层层位的煤巷分级强化控制对策。研究成果已在安徽两淮矿区煤巷工程实践中成功推广应用35×104 m。
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| 关 键 词： | 煤巷顶板 软弱夹层 锚杆支护 失稳特征 分级强化 |
| 收稿时间： | 2011-03-31 |
Influence of soft interlayer location in coal roof on stability of roadway bolting structure |
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| ZHANG Nong,LI Gui-chen,KAN Jia-guang.Influence of soft interlayer location in coal roof on stability of roadway bolting structure[J].Rock and Soil Mechanics,2011,32(9):2753-2758. |
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| Authors: | ZHANG Nong LI Gui-chen KAN Jia-guang |
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| Institution: | 1. School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China |
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| Abstract: | Geological conditions of coal seams in China are very complicated.Existence of a soft interlayer in roof will greatly reduce bolt force and lower safety and reliability of the bolted structure.Regarding the relative position between locations of the soft interlayer in roof and the bolted zone,theoretical analysis and physical simulation have been combined to study the instability characteristics and deformation mechanism of the lamellate roof under mining-influence.Quantitative results of soft interlayer lo... |
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| Keywords: | coal roof soft band bolting instability characteristics classified enhanced control |
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