含水构造附近围岩温度场响应特征与影响因素研究
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摘要
针对矿山含水构造的岩体温度法预报,建立了相应的三维数值模型,应用有限差分软件FLAC3D对含低温水构造影响下的热扩散效应进行了模拟,分析了岩体温度场的响应规律,得出水体的温度影响范围为25 m。定性研究了巷道的开挖过程、岩体的导热性、监测点的埋设位置与埋设深度和巷道作业环境温度对地温场的影响,提出了最佳监测深度为4~6 m,并通过对比不同位置温度曲线的变化斜率来初步判断含水体的位置,总结了岩体温度场拟合曲线的经验公式。为岩体温度法探水提供了可靠依据。
A three-dimensional numerical model was built for the rock temperature method for a water forecast.The thermal diffusion effect was simulated with the help of the finite difference software FLAC3D.The temperature response feature of a rock mass was analyzed and the distance affected by the water temperature was concluded to be around 25m.The impact of the roadway excavation process,the thermal conductivity of rock,the location of monitoring points,the buried depth of the monitoring points and the roadway environment temperature were also qualitatively studied.The best monitoring depth was about 4~6m,and the location of a water-bearing structure was determined by comparing the slope of temperature curves at different positions.Finnally,the temperature fitting curve of a rock mass was found.It provides the theoretical foundation for forecasting water with rock mass temperature.
A three-dimensional numerical model was built for the rock temperature method for a water forecast.The thermal diffusion effect was simulated with the help of the finite difference software FLAC3D.The temperature response feature of a rock mass was analyzed and the distance affected by the water temperature was concluded to be around 25m.The impact of the roadway excavation process,the thermal conductivity of rock,the location of monitoring points,the buried depth of the monitoring points and the roadway environment temperature were also qualitatively studied.The best monitoring depth was about 4~6m,and the location of a water-bearing structure was determined by comparing the slope of temperature curves at different positions.Finnally,the temperature fitting curve of a rock mass was found.It provides the theoretical foundation for forecasting water with rock mass temperature.
引文
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[15]朱伯芳,王同生.水工混凝土结构的温度应力与温度控制[M].北京:水利电力出版社,1976.
[2]张和生,薛光武,石秀伟,等.基于地学信息复合叠置分析对煤层底板突水的预测[J].煤炭学报,2009,34(8):1100-1104.ZHANG Hesheng,XUE Guangwu,SHI Xiuwei,et al.Prediction of water inrush from coal seam floor confinedbased on geo-information composite overlay analysis[J].Journal of Coal Society,2009,34(8):1100-1104.
[3]刘志新,岳建华,刘仰光.矿井物探技术在突水预测中的应用[J].工程地球物理学报,2007,4(1):9-14.LIU Zhixin,YUE Jianhua,LIU Yangguang.Appliationof geohpysicial technology in forecast brust water of coalmining[J].Chinese Journal of Engineering Geophysics,2007,4(1):9-14.
[4]高致宏,林平,梁爽.煤矿水患预测的有效手段[J].煤炭技术,2003,22(09):72-73.GAO Zhihong,LIN Ping,LIANG Shuang.A availablemethod to forecast water-effusing accident in coal mine[J].Coal Technology,2003,22(09):72-73.
[5]王连成.矿井地质雷达的方法及应用[J].煤炭学报,2000,25(1):5-9.WANG Liancheng.Method and application of mine geo-logical radar[J].Journal of Coal Society,2000,25(1):5-9.
[6]江东,王建华,陈佩佩,等.GIS软件支持下的煤矿水害预测研究[J].地质灾害与环境保护,1999,10(1):67-71.JIANG Dong,WANG Jianhua,CHEN Peipei,et al.Es-tablishment and application of the prediction model of wa-ter inrush in coal mines based on GIS[J].Journal of Ge-ological Hazards and Environment Preservation,1999,10(1):67-71.
[7]张平松,刘盛东.地震波CT技术探测煤层上覆岩层破坏规律[J].岩石力学与工程学报,2004,23(15):2510-2513.ZHANG Pingsong,LIU Shengdong.Observation of over-burden failure of coal seam by CT of seismic wave[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2510-2513.
[8]刘树才.煤矿底板突水机制及破坏裂隙带演化动态探测技术[D].徐州:中国矿业大学,2008.LIU Shucai.Mechanism of water inrush from coal seamfloor and continuous survey of fractured zones in coalseam floor[D].Xuzhou:China University of Mining andTechnology,2008.
[9]陈建生,董海洲,吴庆林,等.虚拟热源法研究坝基裂隙岩体渗漏通道[J].岩石力学与工程学报,2005,24(22):4019-4024.Jiansheng,DONG Haizhou,WU Qinglin,et al.Detec-tion of leakage passage in fissure rock with assumptiveheat source method[J].Chinese Journal of Rock Mechan-ics and Engineering,2005,24(22):4019-4024.
[10]刘建刚,陈建生.平面热源法在北江大堤石角段堤基渗漏分析中的应用[J],水利水运工程学报,2002(3):63-65.LIU Jiangang,CHEN Jiansheng.Application of planeheat source method in leakage analysis of Shijiao Reachof Beijiang Dike[J].Hydro-science and Engineering,2002(3):63-65.
[11]WOODBURY A D,SMITH J L.On the thermal effectsof three dimensional groundwater flow[J].Journal ofGeophysical Research,1985,90(B1):759-767.
[12]BREDEHOEFT J D,PAPADOPULOS I S.Rates ofvertical groundwater movement estimated from theearth’s thermal profile[J].Water Resour Res,1965(1):325-328.
[13]康永华,耿德庸.煤矿井下工作面突水与围岩温度场的关系[M].北京:煤炭工业出版社,1996.
[14]何发亮,郭如军,李术才,等.岩体温度法隧道施工掌子面前方涌水预测预报探讨[J].现代隧道技术,2007,44(2):1-5.HE Faliang,GUO Rujun,LI Shucai,et al.Predictingwater-inflow from the face of a tunnel by geothermalmeasurement[J].Modern Tunnelling Technology,2007,44(2):1-5.
[15]朱伯芳,王同生.水工混凝土结构的温度应力与温度控制[M].北京:水利电力出版社,1976.
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