煤田陷落柱波场模拟与分析
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摘要
以常见的煤田陷落柱为基础,建构陷落柱模型,采用声波方程及相应的边界条件对陷落柱的地震纵波响应进行模拟。并对模拟地震记录进行了详细分析,绘制了陷落柱时距曲线。在此基础上,指出了陷落柱柱壁绕射是陷落柱地震响应的重要特征;陷落柱底面强干涉波是其底面的重要标识;并对地震观测系统的选择提出了建议。
Coalfield subsided column is a common geological body in coalfield in China,it seriously effects coal-mining.This paper constructs subsided column model,based with the common coalfield subsided column,and models seismic P-wave respond of subsided column,where the acoustic equation and its boundary and initial conditions are used.In this paper,the modeling seismic records are analyzed in detail,and then subsided column time-distance curve is figured out.It points out that the diffracted wave of subsided column boundary is the important characters of its seismic responding;the intensive interference,produced by bottom of the subsided column,is main flag of subsided column bottom;and gives advice to select seismic survey system in explore.
引文
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