三维地震在双层采空区下组煤勘探中的应用研究

Application study of three-dimensional seismic in exploration of lower group coal in double layer goaf

受限于历史条件的影响,当前大部分煤矿在上组煤的采掘之前,并未对下组煤的赋存及构造发育情况进行有效的勘探。随着上部煤炭资源的开采殆竭,为保持矿井的安全生产和可持续发展,对煤矿采空区下组煤地震勘探的需求日益迫切。本文结合葛泉矿双层采空区下组煤三维地震勘探的工作实例,在地表条件差、双层采空区、煤层数目多、煤层间距小、煤层埋深较浅等不利条件下,提出了资料采集、处理及解释的一体化技术。从最终的时间剖面来看,双层采空区以及年限较短的采空区相较于单层采空区及年限较长的采空区对下组煤的地震勘探影响更大。

Due to the influence of historical conditions,most coal mines did not effectively explore the occurrence and structural development of the lower coal group before the mining of the upper coal group.With the exhaustion of the upper coal resources,the demand for seismic exploration of the lower coal group in the coal mine goaf is increasingly urgent in order to maintain the safe production and sustainable development of the mine.Combined with the working example of three-dimensional seismic exploration of the lower group coal in the double layer goaf of Gequan Mine,the integrated technology of data acquisition,processing and interpretation was proposed under the unfavorable conditions of poor surface conditions,double layer goaf,large number of coal seams,small coal seam spacing and shallow coal seam depth.From the final time profile,the double layer goaf and the goaf of shorter years had a greater impact on the seismic exploration of the lower group coal than the single layer goaf and the goaf of longer years.