最大炮检距对陷落柱探测的影响

Influence of Maximum Offset on Collapse Column Exploration

陷落柱是煤矿开采中的一种常见地质灾害体,地下岩溶水有可能通过陷落柱导升,威胁矿井安全。而三维地震勘探是探测陷落柱的一种有效手段,但目前仍不能满足煤矿地质任务。而最大炮检距在陷落柱探测中有一定影响,以煤田陷落柱为基础,构建陷落柱模型,采用声波方程,在考虑单因素变化原则下,模拟不同的最大炮检距对陷落柱的影响,并对地震记录进行处理,对所得叠加剖面进行对比分析后,认为小炮检距有利于陷落柱勘探。

Collapse column is a common geological disaster in coal mining,underground karst water threatens to coal mine safety by subsided column guide rise. The three- dimensional seismic exploration is an effective mean of detecting subsided column,but it still can not meet mine geology tasks. The maximum offset had a certain influence on the detection of collapse column,taking coal field collapse column as basis and building collapse column model,we use acoustic wave equation to simulate the influence of different maximum offset on collapse column and deal with seismic record in consideration of the principles of the single factor changes. We thick that small offset is advantageous to the exploration of collapse column after comparison and analysis on the stack profile.