| 高应力软岩巷道耦合支护研究 |
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| 引用本文： | 柏建彪,王襄禹,姚喆. 高应力软岩巷道耦合支护研究[J]. 中国矿业大学学报, 2007, 36(4): 421-425 |
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| 作者姓名： | 柏建彪 王襄禹 姚喆 |
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| 作者单位： | 1. 中国矿业大学,煤炭与安全开采国家重点实验室,能源与安全工程学院,江苏,徐州,221008
2. 永城煤电集团有限责任公司,河南,永城,476600 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;教育部跨世纪优秀人才培养计划;全国博士论文作者专项资金项目 |
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| 摘 要： | 为了研究确定高应力软岩巷道二次支护时间和支护强度，以焦煤集团古汉山矿西大巷为研究对象，采用FLAC加中的指数蠕变模型，研究分析围岩应力和围岩变形速度随时间的变化规律、二次支护时间及支护强度对围岩变形的影响规律．结果表明：采用指数蠕变模型得到的围岩变形随时间的变化规律与现场观测基本吻合，一次支护后围岩应力、围岩变形速度趋于稳定的时间段基本一致，在此时间段内进行二次支护后围岩蠕变速度最小，而且二次支护强度在0．25～0．30MPa范围内可以有效地控制围岩蠕变速度，二次支护强度大于该范围，围岩的蠕变速度也不会再有明显的降低，保持了巷道稳定．
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| 关 键 词： | 指数蠕变模型 软岩巷道 高应力 二次支护 合理支护时间 |
| 文章编号： | 1000-1964（2007）04-0421-05 |
| 修稿时间： | 2007-01-24 |
Study of Coupling Support in Soft Rock Roadway Under High Stress |
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| BAI Jian-biao,WANG Xiang-yu,YAO Zhe. Study of Coupling Support in Soft Rock Roadway Under High Stress[J]. Journal of China University of Mining & Technology, 2007, 36(4): 421-425 |
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| Authors: | BAI Jian-biao WANG Xiang-yu YAO Zhe |
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| Abstract: | In order to determine the secondary support time and intensity,the changing rules of the stress and deformation speed of surrounding rocks with time,the effects of the secondary supporting time and intensity of surrounding rocks on deformation were analyzed using exponential creep model of FLAC2D at west tunnel in the Guhanshan Mine of Jiaozuo Coal Industry Group.The results show that the deformation of surrounding rocks is in agreement with the actual observational result.After first support,the times required for steady state of stress and deformation speed of surrounding rocks are similar.Secondary supporting in this time,the creep speed of surrounding rocks is minimum.The creep speed of surrounding rocks is effectively controlled by secondary support within 0.25~0.3 MPa.Even the secondary support intensity beyond this range,the creep speed don't reduce obviously any more. |
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| Keywords: | exponential creep model soft roadway high stress secondary support rational support time |
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