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| 曲江煤矿深部岩巷破坏机理及锚索合理支护时间的确定 |
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屈延嗣1,4,罗立强3 ,王卫军2,5, 凌涛2,51,2,3,4,5
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1.瓦斯灾害监控与应急技术国家重点实验室，重庆 400037;2.煤矿安全开采技术湖南省重点实验室，湖南 湘潭 411201;3.萍乡矿业集团公司青山煤矿，江西 萍乡 337014;4.中煤科工集团重庆研究院有限公司，重庆 400037;5.湖南科技大学 能源与安全工程学院，湖南 湘潭 411201
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| 摘要: |
| 以曲江煤矿为例，针对煤矿深部大巷围岩大变形的支护难题，通过理论分析、实验室实验、数值计算、现场调查及监测等方法，对大巷围岩破坏机理及合理的锚索二次支护时间进行研究.研究表明，高应力作用下巷道围岩蠕变、支护方式的不合理等因素是造成大巷围岩大变形的主要原因，但通过顶底角锚杆、锚索的作用可以在很大程度上改善围岩的应力状态，特别是减少两帮对底板的应力传递作用；巷道开挖进行锚网喷支护1个月后进行锚索等二次支护较为适宜. |
| 关键词: 深井岩巷 变形机理 蠕变 二次支护 |
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| 基金项目:湖南科技大学研究生创新基金项目（S130003）；煤矿安全开采技术湖南省重点实验室开放基金资助项目（201303） |
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| Failure mechanism and timing of anchor support for deep rock roadway on Qujiang mine |
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| Abstract: |
| According to the support problem of deep roadway surrounding rock deformation in Qujiang Mine, theoretical analysis, numerical simulation, laboratory experiments and field investigation was applied to analyze the deformation mechanism and best time of secondary cable support. The results show that the major reason cased the large deformation of surrounding rock with high stress is the surrounding rock creep and unreasonable support form, roof and base angle anchor cable can greatly improve the stress state of surrounding rock, especially on reducing the stress transfer from the two sides to the floor. The best time of secondary cable support is one month later after the roadway have been excavated and bolt-mesh-supported. |
| Key words: deep rock roadway deformation mechanism creep secondary support |
