| 煤矿井工开采对冻土环境的影响分析 |
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| 引用本文： | 曹伟,盛煜,吴吉春,李静,丑亚玲,王生廷.煤矿井工开采对冻土环境的影响分析[J].煤田地质与勘探,2016,44(4):98-104. |
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| 作者姓名： | 曹伟 盛煜 吴吉春 李静 丑亚玲 王生廷 |
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| 基金项目： | 中国科学院重点部署项目（KZZD-EW-13）；国家自然科学基金项目（41271084，41501079）；中国博士后科学基金资助项目（2015M582724）；重庆市博士后科研项目特别资助（Xm2015082）；重庆市博士后日常经费资助（Rc201519） |
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| 摘 要： | 在多年冻土区进行煤矿井工开采，冻土稳定性是影响煤矿开采的制约性因素。采用数值模拟方法分析煤矿井工开采对冻土环境的影响。研究结果表明，最大融深随时间呈增大趋势；沿井壁深度，最大融深逐年增加，在多年冻土与季节冻土的交界附近，最大融深增加较快。由于开采巷道横截面较小，在有效的冻土保护措施下，井壁周围多年冻土温度升高幅度不会太大，因而井工开采会对井壁周围多年冻土造成一定影响，但不会造成大面积冻土的融化变形。
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| 关 键 词： | 井工开采 冻土环境 数值模拟 影响分析 |
| 收稿时间： | 2015-11-01 |
Impact of underground mining on permafrost environment |
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| Abstract: | During underground coal mining in permafrost area, the stability of frozen soil is the constraint factor for coal mining. The paper attempts to investigate the status of permafrost environment after underground mining. We therefore forecast permafrost environment under certain conditions of the initial temperature and different boundary conditions by using the numerical simulation method. The study analyzes the change of the maximum thaw depth (freezing depth) with time at different depth around wall of a well and the space continuity of the maximum thaw-depth (freezing-depth) change with time at different locations of the wall profile. The results show that the maximum freezing depth tends to increase over time. The maximum thaw depth increases along wall of a well year by year and the maximum thaw depth increases faster near the junction of the permafrost and seasonal frozen soil. The cross-section of the mining laneway is smaller, so the increasing range of permafrost temperature is not too large around wall of a well under the effective protection measures. The underground mining thus brings up some certain impact to the surrounding permafrost around wall of a well, but it will not cause a large area of the permafrost thawing deformation. |
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