| 煤层反射槽波三维正演模拟 |
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| 引用本文： | 韩建光,谷丙洛,王硕,杨顺. 煤层反射槽波三维正演模拟[J]. 地质学报, 2024, 98(7): 2258-2268 |
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| 作者姓名： | 韩建光 谷丙洛 王硕 杨顺 |
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| 作者单位： | 中国地质科学院,北京,100037;中国石油大学(华东),山东青岛,266580;山东泰山资源勘查有限公司,山东济南,250104 |
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| 基金项目： | 本文为国家自然科学基金项目(编号42174157, 42004093)、中国地质科学院基本科研业务费项目(编号JKY202216)和中国地质调查项目(编号DD20230008, DD20233002)联合资助的成果 |
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| 摘 要： | 煤炭资源是我国重要的基础能源。我国煤矿开采地质条件较为复杂,随着煤田开采深度及强度不断加大,对煤田微幅构造精细探测的需求日益增加。槽波勘探技术因其探测精度高、抗干扰能力强、波形特征易于识别等优点,是目前获取煤层工作面精细地质构造信息的有效勘探手段。但井下煤层中的波场复杂,反射槽波的波场特征尚待深入研究。本文对煤矿井下三维槽波数值模拟技术进行研究,设计不同类型的含断层三维煤层地质模型,采用三维交错网格高阶有限差分算法模拟反射槽波,分析了反射槽波的波场特征,探讨了不同倾角以及不同断距断层对反射槽波的影响。通过切除干扰波技术,获得有效反射槽波,进而对反射槽波的同相轴进行包络叠加处理,较好地压制了槽波的频散,同相轴明显收敛,能量更为集中,为后续成像处理提供了良好的数据基础。
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| 关 键 词： | 煤层 反射槽波 断层 数值模拟 三维 |
| 收稿时间： | 2023-05-07 |
| 修稿时间： | 2023-05-30 |
Study on 3D forward modeling of reflected in- seam wave in coal seam |
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| HAN Jianguang,GU Bingluo,WANG Shuo,YANG Shun. Study on 3D forward modeling of reflected in- seam wave in coal seam[J]. Acta Geologica Sinica, 2024, 98(7): 2258-2268 |
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| Authors: | HAN Jianguang GU Bingluo WANG Shuo YANG Shun |
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| Affiliation: | Chinese Academy of Geological Sciences, Beijing 100037, China;China University of Petroleum, Qingdao, Shandong 266580, China;Shandong Taishan Resources Exploration Co, Ltd, Jinan, Shandong 250104, China |
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| Abstract: | Coal is important energy resource for China with complex mining conditions. With the increasing of mining depth and intensity, the demand for fine detection of coalfield micro- structure is increasing. In- seam wave exploration technology is an effective means to obtain the fine geological structure information of coal seam working face because of its advantages of high detection accuracy, strong anti- interference ability and easy identification of waveform characteristics. However, the seismic wavefield in underground coal seam is complex, and the wavefield characteristics of reflected in- seam wave need further study. In this paper, we study the 3D in- seam wave numerical simulation technology in underground coal mines. Different types of 3D coal seam geological models with faults are designed, and the reflected in- seam waves are simulated by 3D staggered grid high- order finite difference algorithm. The wavefield characteristics of reflected in- seam waves are analyzed, and the influences of faults with different dip angles and different fault distances on reflected in- seam waves are discussed. The effective reflected in- seam wave is obtained by removing the interference wave technology, and then the reflected in- seam wave is processed by envelope superposition. The dispersion of in- seam wave is suppressed effectively, the event converges obviously, and the energy is more concentrated, which provides a good data basis for the subsequent imaging processing. |
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| Keywords: | coal seam reflected in- seam wave fault numerical simulation three- dimensional |
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