深部软岩巷道锚注支护机理数值模拟研究 |
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引用本文: | 孟庆彬,韩立军,乔卫国,林登阁,李浩. 深部软岩巷道锚注支护机理数值模拟研究[J]. 采矿与安全工程学报, 2016, 0(1): 27-34. DOI: 10.13545/j.cnki.jmse.2016.01.005 |
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作者姓名: | 孟庆彬 韩立军 乔卫国 林登阁 李浩 |
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作者单位: | 1. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏 徐州 221116; 山东省土木工程防灾减灾重点实验室 山东科技大学,山东 青岛 266590;2. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏 徐州,221116;3. 山东省土木工程防灾减灾重点实验室 山东科技大学,山东 青岛,266590 |
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基金项目: | 国家自然科学基金,中国博士后科学基金,山东省土木工程防灾减灾重点实验室开放课题,中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金 |
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摘 要: | 自主研制了破裂岩样承压注浆试验设备,开展了破裂岩体注浆加固力学特性试验,分析了破裂岩样注浆加固前后的力学特性与微观结构。提出了"锚注加固体等效层"概念,采用FLAC~(3D)数值模拟研究了深部软岩巷道锚注支护机理,揭示了"锚注加固体等效层"厚度、弹性模量、内聚力、内摩擦角对巷道围岩位移及塑性区的影响规律,即随着"锚注加固体等效层"参数的提高,巷道围岩位移及塑性区随之降低,体现了注浆可提高破裂岩体的完整性与强度,为锚注支护参数优化设计奠定了基础。
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关 键 词: | 深部 软岩巷道 锚注支护 FLAC3D数值模拟 |
Numerical simulation research of bolt-grouting supporting mechanism in deep soft rock roadway |
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Abstract: | Grouting test equipment for cracked rock mass has been developed independently, and grouting reinforcement test has been done on cracked rock mass. Mechanical characteristics and micro-structure of cracked rock before and after grouting reinforcement have been explored. Concept of“equivalent layer of bolt-grouting reinforcement”has been proposed. Mechanism of bolt-grouting supporting in deep soft rock roadway has been studied with the method of FLAC3D. Influence of dis-placement and plastic zone under different thickness, elastic modulus, cohesion and internal friction an-gle of bolt-grouting reinforcement equivalent layer has been revealed. The paper has shown that as the parameter of the equivalent layer of bolt-grouting reinforcement improves, plastic zone and displace-ment of roadway surrounding rock have reduces, which has reflected that the grout can improve the in-tegrity and strength of cracked rock mass. Research has laid a foundation for parameter optimization design of bolt-grouting supporting. |
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Keywords: | deep soft rock roadway bolt-grouting supporting FLAC3D numerical simulation |
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