海量拟震法三极数据探测采煤裂隙带高度
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摘要
为了摆脱井下巷道数据采集的时空限制,准确高效地探测出采煤裂隙带的发育高度,模拟地震勘探时的数据采集方式,即:单个电极供电时一系列电极同时进行测量,从而获得的视电阻率数据量相对于高密度电法来说是随着所布电极数量的增加而成二次抛物线增长。在淮南某矿井工作面的上方孔中布置了64根观测电极及2根无穷远电极,从而获得的电法数据量是高密度电法的1000多倍。通过对所采拟震法三极视电阻率数据的分析与对比,结合该矿的具体地质情况,认为拟震法三极视电阻率数据清晰地反映了工作面采煤裂隙带的发育高度。拟震法三极视电阻率凭借其海量的数据为准确有效地探测采煤裂隙带高度提供了坚实的保证。
In order to relieve the restrict of time and space,simulated seismic pole-dipole data are used to probe the exact depth of a mining fractured zone.64 measurement electrodes and 2 infinite electrodes were placed in an upper hole at the same time at a mine in Huainan.Simulated seismic pole-dipole data increase like a parabola as the electrodes are added,at least 1000 times data are obtained compared with the high density electrical prospecting.Data analyzed under the certain geological conditions show the clear depth of the mining fracture zone.The method of simulated seismic pole-dipole prospecting is a good way to probe the depth of mining fracture zone relying on overwhelming amount of data.
In order to relieve the restrict of time and space,simulated seismic pole-dipole data are used to probe the exact depth of a mining fractured zone.64 measurement electrodes and 2 infinite electrodes were placed in an upper hole at the same time at a mine in Huainan.Simulated seismic pole-dipole data increase like a parabola as the electrodes are added,at least 1000 times data are obtained compared with the high density electrical prospecting.Data analyzed under the certain geological conditions show the clear depth of the mining fracture zone.The method of simulated seismic pole-dipole prospecting is a good way to probe the depth of mining fracture zone relying on overwhelming amount of data.
引文
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[3]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):18-22.[LUI S D,WU R X,ZHANG P S,etal.High density electric resistance method applied tomonitor and measure overburden failure above seam[J].Coal Science and Technology,2001,29(4):18-22.(in Chinese)]
[4]申宝宏,孔庆军.综放工作面覆岩破坏规律的观测研究[J].煤田地质与勘探,2000,28(5):42-44.[SHEN B H,KONG Q J.Exploration and researchon overlay broken law on mechanization caving miningface[J].Coal Geology&Exploration,2000,28(5):42-44.(in Chinese)]
[5]程久龙.岩体破坏弹性波CT动态探测试验研究[J].岩土工程学报,2000,22(5):565-568.[CHENG J L.The dynamic detection of rock massfailure by elastic wave computerezed tomography[J].Chinese Journal of Geotechnical Engineering,2000,22(5):565-568.(in Chinese)]
[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 P S,LIU SD,WU R X.Observation of overburden failure of coalseam by CT of seismic wave[J].Chinese Journal ofRock Mechanics and Engineering,2004,23(15):2510-2513.(in Chinese)]
[7]滕吉文.关于设立“张衡计划”的建议:为中国地球物理仪器研发和产业化[J].地球物理学进展,2009,24(4):1155-1166.[TENG J W.Specificproposals with regard to set up a“Zhang HengProject:”for research development andindustrialization of Geophysical instruments of China[J].Progress in Geophysics,2009,24(4):1155-1166.(in Chinese)]
[8]胡水根,刘盛东.电法勘探中并行数据采集与传统数据采集效率的比较研究[J].地球物理学进展,2010,25(2):612-617.[HU S G,LIU S D.Camparison study of Efficiency about traditionalelectrical and collateral electrical data collection inelectrical prospecting[J].Progress in Geophysics,2010,25(2):612-617.(in Chinese)]
[9]胡水根.网络并行电法仪器的研制[D].淮南:安徽理工大学,2006.[HU S G.The developing of netand collateral electrical meter[D].Huainan:AnhuiUniversity of Science&Technology,2006.(inChinese)]
[10]黄俊革,王家林,阮百尧.三维高密度电阻率E-SCAN法有限元模拟异常特征研究[J].地球物理学报,2006,49(4):1206-1214.[HUANG J G,WANG J L,RUAN B Y.A study on FEM modeling ofanomalies of 3-D high-density E-SCAN resistivitysurvey[J].Chiness J Geophys,2006,49(4):1206-1214.(in Chinese)]
[11]Gilmore T J,Clayto E A.Mapping the top of thepermafrost using surface direct current resistivitysurvey[J].Environmental Geology,1997,30(1/2):29-33.
[12]Benkabbour B,Toto E A,Fakir Y.Using DCresistivity method to characterize the geometry and thesalinity of the Plioquaternary consolidated coastalaquifer of the Mamora plain,Morocco[J].Environmental Geology,2004(45):518-526.
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