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深部矿井地震散射波成像数值模拟(英文)

Numerical simulation scattered imaging in deep mines

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【作者】 胡明顺潘冬明李娟娟

【Author】 Hu Ming-Shun1,2,Pan Dong-Ming1,2,and Li Juan-Juan1,31.The School of Resource and Earth Science,China University of Mining and Technology,Xuzhou,221116,China. 2.State Key Laboratory For Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,221116,China. 3.Key Laboratory of CBM Resources and Reservoir Formation Process,Ministry of Education,China University of Mining and Technology,Xuzhou,221116,China.

【机构】 中国矿业大学资源与地球科学学院中国矿业大学深部岩土力学与地下工程国家重点实验室中国矿业大学煤层气资源与成藏过程教育部重点实验室

【摘要】 常规地震勘探大多基于反射波理论,对尺度小、倾角陡、构造复杂的灾害性地质体,很难得到精确的成像结果。本文建立2类典型矿井地质模型,采用有限差分正演模拟算法,研究了矿井地震散射波的特征,将等效偏移距偏移(EOM)和基于等效偏移距干涉叠加偏移的散射成像方法用于矿井地震勘探中,重点分析了散射波成像相比常规反射波地震成像的技术优势。研究表明:1)散射成像方法能够提高覆盖次数,充分利用有效的弱散射信号,对不均匀复杂地质体的散射波的成像效果明显优于反射波叠后偏移;2)对于巷道超前探测,它弥补了基于射线理论的叠加偏移的不足,为提高矿井地震勘探分辨率提供了有效的成像方法。

【Abstract】 Conventional seismic exploration,mostly based on reflection theory,hardly has accurate imaging results for disaster geologic bodies which have small scale,steep dip,or complex structure.In this paper,we design two typical geologic models for analyzing the characteristics of scattered waves in mines for forward modeling by finite difference and apply the equivalent offset migration(EOM)and EOM-based interference stack migration methods to mine prospecting.We focus on the analysis of scatted imaging’s technological superiority to reflection imaging.Research shows:1)scattered imaging can improve fold and make the best of weak scattered information,so it shows better results than post-stack migration imaging and 2)it can utilize the diffraction stack migration method-based ray path theory for mine seismic advanced prediction,so it provides an new efficient imaging method for improving resolution of mine seismic exploration.

【基金】 supported financially by the National Key Project(Grant No.2008ZX05035);the 973 Program(Grant No. 2009CB219603 and 2007CB209406);the National Natural Science Foundation of China(Grant No.50974081)
  • 【文献出处】 Applied Geophysics ,应用地球物理(英文版) , 编辑部邮箱 ,2010年03期
  • 【分类号】P631.4
  • 【被引频次】4
  • 【下载频次】204
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