透射槽波能量衰减系数成像与陷落柱探测
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为了实现工作面内陷落柱的精确探测,克服坑透法成像分辨率过低的不足,对透射槽波能量衰减系数的CT成像技术展开研究。利用新型矿井无缆自记式地震仪开通道数不受限制的特点,提高成像区域的射线覆盖次数;采用带有平滑约束的代数重建算法,实现探测区透射槽波能量衰减系数成像,并在王坡煤矿3204工作面部分区域开展试验。结果表明:透射槽波能量衰减对陷落柱有明显的反映,成像结果能够清晰反映煤层中陷落柱位置与边界,为准确探测陷落柱发育情况提供依据。
In order to precisely detect collapse columns in coal mining face,and overcome the weakness in resolution of radio tunnel tomography,the authors studied the technology of transmission in-seam wave attenuation tomography. Taking advantage of the new type of selfrecording mine seismograph,the number of geophones was unlimited and the density of rays between shot and geophones was increased.Based on this equipment,this paper discussed the ART algorithm with a smoothness constraint to achieve tomography of transmission inseam wave attenuation. The new equipment and method was applied in the detection of collapse columns lay in the No. 3204 Coal Mining Face of Wangpo Coal Mine. The result shows that attenuations of transmission in-seam waves are sensitive to collapse columns. The result of tomography can distinctly reflect the positions and boundaries of collapse columns in coal seam. It provides the basis to accurately determinate properties of collapse columns.
引文
[1]虎维岳,田干.我国煤矿水害类型及其防治对策[J].煤炭科学技术,2010,38(1):92-96.
    [2]王均双,薄夫利,马冲.坑透CT成像技术在工作面地质构造探测中的应用[J].煤炭科学技术,2008,36(10):93-96.
    [3]程建远.典型含煤模型Love型槽波的频散特征分析[J].煤炭学报,2012,37(1):68-72.
    [4]胡国泽,滕吉文,皮娇龙,等.井下槽波地震勘探:预防煤矿灾害的一种地球物理方法[J].地球物理学进展,2013,28(1):439-451.
    [5]Krey T C.Channel waves as a tool of applied geophysics in coal mining[J].Geophysics,1962,28(5):701-714.
    [6]Mason I M,Buchanan D J,Booer A K.Channel wave mapping of coal seams in the United Kingdom[J].Geophysics,1980,45(7):1131-1143.
    [7]姬广忠,程建远,朱培民,等.煤矿井下槽波三维数值模拟及频散分析[J].地球物理学报,2012,55(2):645-654.
    [8]Mason I M.Algebraic reconstruction of a two-dimensional velocity inhomogeneity in the High Hazles seam of Thoresby colliery[J].Geophysics,1981,46(3):298-308.
    [9]Parra J O,Zook B J.Transmission and detection of guided seismic waves in attenuating media[J].Geophysics,1998,63(4):1190-1199.
    [10]Yancey D J,Imhof M G,Feddock J E,et al.Analysis and application of coal-seam seismic waves for detecting abandoned mines[J].Geophysics,2007,72(5):M7-M15.
    [11]王伟,高星,李松营,等.槽波层析成像方法在煤田勘探中的应用:以河南义马矿区为例[J].地球物理学报,2012,55(3):1054-1062.
    [12]Lu Wenkai,Yin Fangfang.Adaptive algebraic reconstruction technique[J].Medical physics,2004,31(12):3222-3230.
    [13]吴海.基于ARM技术的矿井自记式地震仪[J].煤田地质与勘探,2013,41(4):81-84.
    [14]王季.基于EMD算法的煤层透射槽波信号提纯[J].中国煤炭地质,2012,24(2):53-60.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心