钻孔并行电法探测煤层开采覆岩破坏在祁南矿713工作面的应用
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摘要
在工作面特定位置布置覆岩破坏观测钻孔,布置孔内电法观测系统,利用矿井并行电法仪采集电法数据,进行电阻率层析成像。通过采动影响前后覆岩变形与破坏区电阻率值变化情况,划分垮落带和导水裂缝带高度。在祁南矿713工作面施工2处覆岩破坏观测钻孔,获得的电阻率变化较好地反映了覆岩变形与破坏的动态发育情况,得到的垮落带和导水裂缝带高度直观可靠,取得了很好的应用效果。
Computerized tomography(CT) of resistivity can be conducted by laying overburden destruction surveying drill-bores at specific locations on the working platform,deploying the in-bore electrical surveying system and making use of the parallel electrical instrument to gather electrical data.By analyzing the covering rock deformation before and after mining and the changes of resistivity value,caving zone and the height of water flowing fractured zone can be determined.Two overburden destruction surveying drill-bores have been laid on the 713 working platform in Qinan Coal Mine to observe the changes of resistivity,which properly reflects the deformation of dynamic destruction of covering rock.In addition,the caving zone and the height of water flowing fractured zone obtained from electrical surveying system are very affordable and intuitive,which has been proved to be with excellent application effect.
Computerized tomography(CT) of resistivity can be conducted by laying overburden destruction surveying drill-bores at specific locations on the working platform,deploying the in-bore electrical surveying system and making use of the parallel electrical instrument to gather electrical data.By analyzing the covering rock deformation before and after mining and the changes of resistivity value,caving zone and the height of water flowing fractured zone can be determined.Two overburden destruction surveying drill-bores have been laid on the 713 working platform in Qinan Coal Mine to observe the changes of resistivity,which properly reflects the deformation of dynamic destruction of covering rock.In addition,the caving zone and the height of water flowing fractured zone obtained from electrical surveying system are very affordable and intuitive,which has been proved to be with excellent application effect.
引文
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[8]吴荣新,张平松,刘盛东.双巷网络并行电法探测工作面内薄煤区范围[J].岩石力学与工程学报,2009,28(9):1 834-1 838.
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[10]Paolo Mauriello,Domenico Patella.Resistivity AnomalyImaging by Probability Tomography[J].GeophysicalProspecting,1999,47(3):411-429.
[11]Zhou Bing,S.A.Greenhalgh.A Snthetic Study on CrossHole Resistivity Imaging Using Different Electrode Arrays[J].Exploration Geophysics,1997,28(2):1-5.
[2]刘盛东,吴荣新,张平松,等.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):18-19.
[3]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.
[4]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):2 510-2 513.
[5]刘盛东,张平松.分布式并行智能电极电位差信号采集方法:中国,zl200410014020.0[P].2006-07-26.
[6]吴荣新,刘盛东,周官群.高分辨地电阻率法探测煤矿地质异常体[J].煤炭科学技术,2007,35(7):33-38.
[7]吴荣新,刘盛东,张平松.双巷并行电法探测煤层工作面底板富水区[J].煤炭学报,2010,35(3):454-457.
[8]吴荣新,张平松,刘盛东.双巷网络并行电法探测工作面内薄煤区范围[J].岩石力学与工程学报,2009,28(9):1 834-1 838.
[9]董清华,曹俊兴.井间电阻率层析成象的几处问题研究[J].地球物理学进展,1998,13(4):84-88.
[10]Paolo Mauriello,Domenico Patella.Resistivity AnomalyImaging by Probability Tomography[J].GeophysicalProspecting,1999,47(3):411-429.
[11]Zhou Bing,S.A.Greenhalgh.A Snthetic Study on CrossHole Resistivity Imaging Using Different Electrode Arrays[J].Exploration Geophysics,1997,28(2):1-5.
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