| 煤矿顶部隔水性能多尺度评价 |
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| 引用本文： | 杨月堂.煤矿顶部隔水性能多尺度评价[J].中州煤炭,2023,0(2):268-274. |
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| 作者姓名： | 杨月堂 |
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| 作者单位： | （中煤湖北地质勘察基础工程有限公司，湖北 武汉 430299） |
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| 摘 要： | 为了确保煤矿开采的安全，基于水文地质特征分析设计了煤矿顶部隔水性试验。根据研究区的实际情况，从隔水层和含水层2方面分析了研究区的水文地质特征，基于井下压水试验设备的特点，选择单回路测试装置在煤矿顶部开展压水试验，根据压力—流量曲线的类型及特点，测试了煤矿顶部的隔水性。测试结果表明，Q18钻孔附近的前27.5 m段存在2段非层流现象，分别为521.2～526.7 m和532.2～537.7 m,而其他3段的透水率在0.42～0.63 Lu,具有较弱的透水率，压水试验说明煤矿顶部的透水率较弱，但是隔水性能较好；在渗透系数计算结果中，煤矿顶部的渗透系数在0.000 430 8～0.000 687 4 m/d,说明测试段的透水性极弱，而隔水性较强，保证了煤矿生产的安全。
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| 关 键 词： | 水文地质特征分析 压水试验 隔水性试验 煤矿顶部 透水系数 |
Multiscale evaluation of water impermeability of coal mine roof |
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| Yang Yuetang. Multiscale evaluation of water impermeability of coal mine roof[J].Zhongzhou Coal,2023,0(2):268-274. |
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| Authors: | Yang Yuetang |
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| Affiliation: | （China Coal Hubei Geological Survey Foundation Engineering Co.，Ltd.，Wuhan 430299，China） |
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| Abstract: | In order to further ensure the safety of coal mining，based on the analysis of hydrogeological characteristics，the water impermeability test of coal mine top is designed.According to the actual situation of the study area，the hydrogeological characteristics of the study area are analyzed from the two aspects of aquiclude and aquifer.Based on the characteristics of underground water pressure test equipment，a single circuit test device is selected to carry out water pressure test on the top of the coal mine.According to the types and characteristics of pressure flow curve，the water resistance of the top of the coal mine is tested.The results show that there are two non laminar flow phenomena in the first 27.5 m section near borehole Q18，which are 521.2~526.7 m and 532.2~537.7 m respectively，while the water permeability of the other three sections is between 0.42~0.63 Lu，which has a weak water permeability.The water pressure test shows that the water permeability of the top of the coal mine is weak，but the water separation performance is good.In the calculation results of permeability coefficient，the permeability coefficient of the top of the coal mine ranges from 0.000 430 8 m/d to 0.000 687 4 m/d，indicating that the water permeability of the test section is very weak and the water barrier is strong，which ensures the safety of coal mine production. |
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| Keywords: | ,analysis of hydrogeological characteristics, water pressure test, water resistance test, top of coal mine, permeability coefficient |
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