矿井含水构造附近采动岩体的温度响应特征相似模拟研究
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摘要
研究含水构造附近在采动影响下围岩的热扩散理论,采用新型的流–固耦合相似材料和相似模拟试验架,完善光纤温度、多点位移监测系统。对含水构造附近的煤层开采进行试验模拟,重点分析采动过程中覆岩变形引起渗流场、温度场的变化规律。通过试验得出:煤层开采前,初始地温场中含水构造处具有明显的低温异常特征;采动过程中,顶板岩体的热对流作用随采场推进逐步加强,岩体温度逐步降低,水体的温度影响范围逐步增大;在采动应力、承压水的耦合作用下,采场顶板断裂突水,岩体温度产生显著的突跳特征。通过试验数据,拟合试验条件下岩体温度场曲线的经验公式,为岩体温度法探水提供可靠的试验依据。
The theory of thermal diffusion in surrounding rocks affected by mining around the water-bearing structure is studied.The new style advanced model test device and similar material of typical hydro-mechanical coupling is used and the monitoring system of grating temperature and displacement is improved.The coal mining around the water-bearing structure is simulated by tests.The variation laws of seepage and temperature fields induced by deformation of overburden rock during mining are analyzed.There is obvious abnormal temperature feature in the intact rock mass around the water-hearing structure before mining.The temperature of rock mass reduces gradually with the mining.Temperature response feature of water inrush is obvious in layered rock mass upper the gob.The temperature fitting curve of rock mass is concluded with the data of the model test.It provides the theoretical foundation for the forecasting water with rock mass temperature method.
The theory of thermal diffusion in surrounding rocks affected by mining around the water-bearing structure is studied.The new style advanced model test device and similar material of typical hydro-mechanical coupling is used and the monitoring system of grating temperature and displacement is improved.The coal mining around the water-bearing structure is simulated by tests.The variation laws of seepage and temperature fields induced by deformation of overburden rock during mining are analyzed.There is obvious abnormal temperature feature in the intact rock mass around the water-hearing structure before mining.The temperature of rock mass reduces gradually with the mining.Temperature response feature of water inrush is obvious in layered rock mass upper the gob.The temperature fitting curve of rock mass is concluded with the data of the model test.It provides the theoretical foundation for the forecasting water with rock mass temperature method.
引文
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[12]李树忱,冯现大,李术才,等.新型固流耦合相似材料的研制及其应用[J].岩石力学与工程学报,2010,29(2):281–288.(LI Shuchen,FENG Xianda,LI Shucai,et al.Research and development of a newsimilar material for solid-fluid coupling and its application[J].ChineseJournal of Rock Mechanics and Engineering,2010,29(2):281–288.(in Chinese))
[13]康永华,赵开全,刘治国,等.高水压裂隙岩体综采覆岩破坏规律[J].煤炭学报,2009,34(6):721–725.(KANG Yonghua,ZHAOKaiquan,LIU Zhiguo,et al.Devastating laws of overlying strata withfissure under high hydraulic pressure[J].Journal of China CoalSociety,2009,34(6):721–725.(in Chinese))
[14]李沛涛,武强.底板破坏型采煤工作面突水机制及治理技术[J].辽宁工程技术大学学报:自然科学版,2008,27(5):653–656.(LIPeiqiang,WU Qiang.Water-inrush mechanism and government techniqueof working-face evoked by mining floor damage[J].Journal of LiaoningTechnical University:Natural Science,2008,27(5):653–656.(inChinese))
[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):1 100–1 104.(ZHANGHesheng,XUE Guangwu,SHI Xiuwei,et al.Prediction of waterinrush from coal seam floor confined based on geo-informationcomposite overlay analysis[J].Journal of China Coal Society,2009,34(8):1 100–1 104.(in Chinese))
[3]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):2 510–2 513.(ZHANGPingsong,LIU Shengdong.Observation of overburden failure of coalseam by CT of seismic wave[J].Chinese Journal of Rock Mechanicsand Engineering,2004,23(15):2 510–2 513.(in Chinese))
[4]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[博士学位论文][D].徐州:中国矿业大学,2008.(LIU Shucai.Mechanismof water inrush from coal seam floor and continuous survey offractured zones in coal seam floor[Ph.D.Thesis][D].Xuzhou:ChinaUniversity of Mining and Technology,2008.(in Chinese))
[5]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):4 019–4 024.(CHENJiansheng,DONG Haizhou,WU Qinglin,et al.Detection of leakagepassage in fissure rock with assumptive heat source method[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(22):4 019–4 024.(in Chinese))
[6]CERMAK V,JETEL J.Heat flow and ground water movement in theBohemian Cretaceous Basin[J].Geodynam,1985,(4):285–303.
[7]WOODBURY,ALLAN D,SMITH L.On the thermal effects ofthree-dimensional groundwater flow[J].Journal of GeophysicalResearch,1985,90(B1):759–767.
[8]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,1996:18–39.(KANG Yonghua,GENGDeyong.The relation of emerge water and temperature field of wallrock in the working face of coal mine[M].Beijing:China CoalIndustry Publishing House,1996:18–39.(in Chinese))
[9]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.Predicting water-inflow from the face ofa tunnel by geothermal measurement[J].Modern Tunnelling Technology,2007,44(2):1–5.(in Chinese))
[10]贺玉龙.三场耦合作用相关试验及耦合强度量化研究[博士学位论文][D].成都:西南交通大学,2003.(HE Yulong.Study on relevantexperiments and quantification of coupling strength for coupledthermo-hydro-mechanical behavior of saturated rocks[Ph.D.Thesis][D].Chengdu:Southwest Jiaotong University,2003.(inChinese))
[11]胡耀青,赵阳升,杨栋.三维固流耦合相似模拟理论与方法[J].辽宁工程技术大学学报:自然科学版,2007,26(2):204–206.(HUYaoqing,ZHAO Yangsheng,YANG Dong.3D solid-liquid couplingexperiment study of deformation destruction of coal stope[J].Journalof Liaoning Technical University:Natural Science,2007,26(2):204–206.(in Chinese))
[12]李树忱,冯现大,李术才,等.新型固流耦合相似材料的研制及其应用[J].岩石力学与工程学报,2010,29(2):281–288.(LI Shuchen,FENG Xianda,LI Shucai,et al.Research and development of a newsimilar material for solid-fluid coupling and its application[J].ChineseJournal of Rock Mechanics and Engineering,2010,29(2):281–288.(in Chinese))
[13]康永华,赵开全,刘治国,等.高水压裂隙岩体综采覆岩破坏规律[J].煤炭学报,2009,34(6):721–725.(KANG Yonghua,ZHAOKaiquan,LIU Zhiguo,et al.Devastating laws of overlying strata withfissure under high hydraulic pressure[J].Journal of China CoalSociety,2009,34(6):721–725.(in Chinese))
[14]李沛涛,武强.底板破坏型采煤工作面突水机制及治理技术[J].辽宁工程技术大学学报:自然科学版,2008,27(5):653–656.(LIPeiqiang,WU Qiang.Water-inrush mechanism and government techniqueof working-face evoked by mining floor damage[J].Journal of LiaoningTechnical University:Natural Science,2008,27(5):653–656.(inChinese))
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