陷落柱的绕射波

Difraction waves from fallen pillars,

1. 山西煤田地质综合普查队,榆次030600;2. 中国矿业大学信息处理与研究中心,北京100083;3. 北京科技大学博士后流动站,北京100083

Shanxi Integrated Coalfield Geological Reconnaissance Party, Yuci City 030600

陷落柱是煤田开采中常见的一种地质体,陷落柱的研究对煤炭开采具有重要的理论与应用价值。文中对陷落柱断陷点的绕射波时距曲线方程及数学模型做了较细致的研究,证明陷落柱断陷点的绕射波同一般断点的绕射波存在传播时间上的差异,我们将其称之为延迟绕射波。结合实际地震剖面,我们对陷落柱的绕射波的传播特性、识别方法、定性定量解释及其在实际地震资料解释中的应用进行了探讨。

Fallen pillar is a common geologic body in coal exploitation. Researches on fallen pillars are of great value theoretically and practically. In this paper a relatively detailed study of diffraction time distance curve and its mathematic model at the falling points of fallen pillars is presented. It shows that the diffraction waves of the falling points are different from those of breaking points in propagation time, hereby being called delay diffraction waves. The propagation characteristics, identification, qualitative and quantitative interpretation and applications of the delay diffraction waves to real seismic interpretation are discussed.