岩层变形与破坏电法测试系统研究
|
摘要
利用井下钻孔电阻率法可以动态获得煤层采动过程中上覆岩层变形与破坏发育规律,根据采动进度测取不同时期岩层电场变化特征,可对岩层变形与破坏规律进行全面的分析研究。受现场测试条件所限,顶板单一钻孔所测得的数据具有全空间效应,因此,对岩层破坏定位存在一定的影响,从而降低了对覆岩破坏发育规律的认识能力。通过模型试验及现场测试效果对比,改进单孔电阻率测试方法,采用孔-巷间电阻率CT测试系统,进一步提升了原单一钻孔电法系统数据采集约束性,为电阻率分布反演及"两带"高度判定奠定基础。实际应用结果表明,孔巷电阻率CT测试图像清楚,对岩层受采动影响的破坏特征反应灵敏,提升了对岩层变形与破坏发育的解释能力。
Through borehole drilled in the top rock,the bore observing system by bore resistivity method is formed;and the distortion and collapsing characters in the top rock of the working face can be tested dynamically during digging process.According to mining velocity the changing characters of electric field in different times can be gained.And the changing law of overburden failure affected by mining can be researched comprehensively.Limited by testing condition in the spot of laneway,through single borehole in the top rock the testing data have the full space effect,the explaining result and location for rock failure is affected in different extents.Its resolution for the law of overburden failure is decreased.Through model test and practical detection,the resistivity testing method using the single borehole in the top rock is improved.The bore-laneway resistivity method is formed through laying the poles in the laneway,and the binding character of the resistivity data is enhanced compared to the single borehole system in the top rock.It provides the base for the resistivity inversion and the height judgment of the two belts.The practical researching results show that the bore-laneway resistivity CT method has sensitive reaction to structure change affected by mining;and its resistivity section is clear and dynamic.The resistivity ratio section and background detection can resolve effectively the characters of the process in the coal mining.The explaining capable of the detection achievements for the overburden failure is improved.The result is helpful to renew the practice of the overburden failure.
Through borehole drilled in the top rock,the bore observing system by bore resistivity method is formed;and the distortion and collapsing characters in the top rock of the working face can be tested dynamically during digging process.According to mining velocity the changing characters of electric field in different times can be gained.And the changing law of overburden failure affected by mining can be researched comprehensively.Limited by testing condition in the spot of laneway,through single borehole in the top rock the testing data have the full space effect,the explaining result and location for rock failure is affected in different extents.Its resolution for the law of overburden failure is decreased.Through model test and practical detection,the resistivity testing method using the single borehole in the top rock is improved.The bore-laneway resistivity method is formed through laying the poles in the laneway,and the binding character of the resistivity data is enhanced compared to the single borehole system in the top rock.It provides the base for the resistivity inversion and the height judgment of the two belts.The practical researching results show that the bore-laneway resistivity CT method has sensitive reaction to structure change affected by mining;and its resistivity section is clear and dynamic.The resistivity ratio section and background detection can resolve effectively the characters of the process in the coal mining.The explaining capable of the detection achievements for the overburden failure is improved.The result is helpful to renew the practice of the overburden failure.
引文
[1]刘盛东,张平松.地下工程震波探测技术[M].徐州:中国矿业大学出版社,2008.
[2]国家煤炭工业局.建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程[M].北京:煤炭工业出版社,2000.
[3]尹增德.采动覆岩破坏特征及其应用研究[D].青岛:山东科技大学,2007.
[4]贾光胜,毛德兵.综放开采顶煤体离层与破坏规律研究[J].矿山压力与顶板管理,2002,(2):6-8.JIA Guang-sheng,MAO De-bing.Study of the separationand the broken law of top-coal in longwall top-coalcaving mining[J].Ground Pressure and Strata Control,2002,(2):6-8.
[5]刘盛东,吴荣新,张平松.高密度电阻率法观测煤层上覆岩层破坏[J].煤炭科学技术,2001,29(4):18-20.LIU Sheng-dong,WU Rong-xin,ZHANG Ping-song.High density electric resistance method applied tomonitor and measure overburden failure above seam[J].Coal Science and Technology,2001,29(4):18-20.
[6]张平松,刘盛东,吴荣新.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 Ping-song,LIU Sheng-dong,WU Rong-xin.Observation of overburden failure of coal seam by CT ofseismic wave[J].Chinese Journal of Rock Mechanicsand Engineering,2004,23(15):2510-2513.
[7]张平松,吴基文,刘盛东.煤层采动底板破坏规律动态观测研究[J].石力学与工程学报,2006,25(增刊1):3009-3013.ZHANG Ping-song,WU Ji-wen,LIU Sheng-dong.Studyof dynamic observation of coal seam floor’s failure law[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.1):3009-3013.
[8]张平松,刘盛东,吴荣新.采煤面覆岩变形与破坏立体电法动态测试[J].岩石力学与工程学报,2009,28(9):1870-1875.ZHANG Ping-song,LIU Sheng-dong,WU Rong-xin.Dynamic detection of overburden deformation and failurein mining workface by 3D resistivity method[J].ChineseJournal of Rock Mechanics and Engineering,2009,28(9):1870-1875.
[9]张光澄,张雷.实用数值分析[M].成都:四川大学出版社,2009.
[10]SHIMA H.Two-dimensional automatic resistivityinversion technique using alpha centers[J].Geophysics,1990,55(6):628-694.
[11]SASAKI Y.3D resistivity inversion using the finite-element method[J].Geophysics,1994,59(11):1839-1848.
[12]LOKE M H,BARKER R D.Practical techniques for 3Dresistivity surveys and data inversion[J].GeophysicalProspecting,1996,44(3):499-523.
[13]程久龙,于师建.覆岩变形破坏电阻率响应特征的模拟实验研究[J].地球物理学报,2000,43(5):699-706.CHENG Jiu-long,YU Shi-jian.Simulation experiment onthe response of resistivity to deformation and failure ofoverburden[J].Chinese Journal of Geophysics,2000,43(5):699-706.
[2]国家煤炭工业局.建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程[M].北京:煤炭工业出版社,2000.
[3]尹增德.采动覆岩破坏特征及其应用研究[D].青岛:山东科技大学,2007.
[4]贾光胜,毛德兵.综放开采顶煤体离层与破坏规律研究[J].矿山压力与顶板管理,2002,(2):6-8.JIA Guang-sheng,MAO De-bing.Study of the separationand the broken law of top-coal in longwall top-coalcaving mining[J].Ground Pressure and Strata Control,2002,(2):6-8.
[5]刘盛东,吴荣新,张平松.高密度电阻率法观测煤层上覆岩层破坏[J].煤炭科学技术,2001,29(4):18-20.LIU Sheng-dong,WU Rong-xin,ZHANG Ping-song.High density electric resistance method applied tomonitor and measure overburden failure above seam[J].Coal Science and Technology,2001,29(4):18-20.
[6]张平松,刘盛东,吴荣新.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 Ping-song,LIU Sheng-dong,WU Rong-xin.Observation of overburden failure of coal seam by CT ofseismic wave[J].Chinese Journal of Rock Mechanicsand Engineering,2004,23(15):2510-2513.
[7]张平松,吴基文,刘盛东.煤层采动底板破坏规律动态观测研究[J].石力学与工程学报,2006,25(增刊1):3009-3013.ZHANG Ping-song,WU Ji-wen,LIU Sheng-dong.Studyof dynamic observation of coal seam floor’s failure law[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.1):3009-3013.
[8]张平松,刘盛东,吴荣新.采煤面覆岩变形与破坏立体电法动态测试[J].岩石力学与工程学报,2009,28(9):1870-1875.ZHANG Ping-song,LIU Sheng-dong,WU Rong-xin.Dynamic detection of overburden deformation and failurein mining workface by 3D resistivity method[J].ChineseJournal of Rock Mechanics and Engineering,2009,28(9):1870-1875.
[9]张光澄,张雷.实用数值分析[M].成都:四川大学出版社,2009.
[10]SHIMA H.Two-dimensional automatic resistivityinversion technique using alpha centers[J].Geophysics,1990,55(6):628-694.
[11]SASAKI Y.3D resistivity inversion using the finite-element method[J].Geophysics,1994,59(11):1839-1848.
[12]LOKE M H,BARKER R D.Practical techniques for 3Dresistivity surveys and data inversion[J].GeophysicalProspecting,1996,44(3):499-523.
[13]程久龙,于师建.覆岩变形破坏电阻率响应特征的模拟实验研究[J].地球物理学报,2000,43(5):699-706.CHENG Jiu-long,YU Shi-jian.Simulation experiment onthe response of resistivity to deformation and failure ofoverburden[J].Chinese Journal of Geophysics,2000,43(5):699-706.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心