微动勘探方法探测林南仓煤矿岩浆岩侵入体
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摘要
为了在村庄覆盖、第四系地层厚度较大的测区有效探测井田岩浆岩侵入体,首次采用微动勘探方法探测,利用微动测深获得的S波速度结构,结合实测视S波速度剖面特征,综合分析解释岩浆岩侵入体情况。在林南仓煤矿西四采区实测2条剖面,各测点下方的S波速度结构相似,视S波速度剖面上未见高速异常体穿插煤系地层,分析表明该采区无大规模岩浆岩侵入体。实际应用也证明,微动探测结果与探巷验证情况吻合,微动勘探方法利用岩浆岩与煤层的S波速度差异,能有效探测煤田岩浆岩侵入体。
In order to effectively detect the igneous magma intrusions in the overburdens under the village and thick Quaternary strata measuring area,the micro seismic exploration method was firstly applied to the detection of the igneous magma intrusion.The S wave velocity structure was obtained with the micro seismic detection.In combination with the features of the site visual S wave velocity cross section,a comprehensive analysis explanation was made on the igneous magma intrusion conditions.There were two cross sections site measured at the West No.4 Mining Block in Linnancang Minefield.The S wave velocity structure under the each measured location were similar.From the visual S wave velocity cross section,there was no high velocity abnormal mass passed through the coal measures strata and there was no large scale igneous magma intrusion in the mining block.The actual application showed that the results of the micro seismic detection could meet with the mine roadway detection results.With the S-wave velocity difference between the magma rock and seam,the micro seismic detection method could effectively detect the igneous magma intrusion in the coalfield.
In order to effectively detect the igneous magma intrusions in the overburdens under the village and thick Quaternary strata measuring area,the micro seismic exploration method was firstly applied to the detection of the igneous magma intrusion.The S wave velocity structure was obtained with the micro seismic detection.In combination with the features of the site visual S wave velocity cross section,a comprehensive analysis explanation was made on the igneous magma intrusion conditions.There were two cross sections site measured at the West No.4 Mining Block in Linnancang Minefield.The S wave velocity structure under the each measured location were similar.From the visual S wave velocity cross section,there was no high velocity abnormal mass passed through the coal measures strata and there was no large scale igneous magma intrusion in the mining block.The actual application showed that the results of the micro seismic detection could meet with the mine roadway detection results.With the S-wave velocity difference between the magma rock and seam,the micro seismic detection method could effectively detect the igneous magma intrusion in the coalfield.
引文
[1]丁立锋.开滦林南仓井田岩浆岩侵入规律及找煤方向探讨[J].中国煤田地质,2004,16(S):12-13.
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[2]Toks z M N,Lacoss R T.Microtremors:Mode Structure andSources[J].Science,1968,159(3817):872-873.
[3]Aki K.Space and Time Spectra of Stationary Stochastic Waves,With Special Reference to Microtremors[J].Bull Earthq ResInst,1957,35(3):415-456.
[4]Okada H.The Microtremor Survey Method,Society of Explora-tion Geophysicists,Geophysical Monographs Series Vol 12,Translated by Koya Suto,Society of Exploration Geophysicists,Tulsa,2003.
[5]Okada H.Theory of Efficient Array Observations of Microtremorswith Special Reference to the SPAC Method[J].Explor Geo-phys,2006,37(1):73-85.
[6]Ling S Q.Research on the Estimation of Phase Velocities of Sur-face Waves in Microtremors[D].Hokkaido:Hokkaido Universi-ty,1994.
[7]Cho I,Nakanishi I,Ling S Q,et al.Application of Forking Ge-netic Algorithm FGA to an Exploration Method Using Micro-tremors[J].Butsuri-Tansa(in Japanese),1999,52(3):227-246.
[8]凌苏群,三轮滋.瞬态面波法和微动勘探法在日本新瀉县中越地震灾区地质调查中的应用[C]//工程物探新技术.北京:地质出版社,2006.
[9]徐佩芬,李传金,凌苏群,等.利用微动勘察方法探测煤矿陷落柱[J].地球物理学报,2009,52(7):1923-1930.
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