深部煤层构造探测地震地质条件与探查效果分析
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摘要
深部煤层开拓生产过程中勘探地质资料相对较少,为准确获得煤层赋存资料,可利用井下巷道顶、底板岩层条件有效对近巷道煤层进行反射地震勘探。以淮南潘二煤矿某工作面煤层构造探测地震为例,通过地质条件分析,在煤层顶、底板的高抽巷道和底抽巷道分别设计二条测线,其中底抽巷道测线沿巷道顶板和两帮布置,高抽巷道地震测线沿巷道底板和两帮布置。由试验确定数据采集中的偏移距10m,道间距2m,炮间距2m。解释高、底抽巷的浅层地震剖面,发现异常断点7个。井下掘进揭露资料表明,对于断层及异常解释的准确率为80%。该勘探实例表明,当高、底抽巷与上下顺槽巷道相距20~60m时,获得的构造解释对生产指导意义重大。
There are relatively less geological exploration data available during the development and production processes,making use of underground roof and floor conditions to carry out reflection seismic prospecting for near roadway coal seams can get coal seam oc curence data correctly.Taking the coal seam structure seismic prospecting in a working face in the Panji No.2 coalmine,Huainan as an example,after geological condtion analysis,two lines for roof and floor drainage ways each have been designed,in which,floor drainage way line layout along roof and two walls,while roof drainage way along floor and two walls.Test determined data acquisition offset is 10m,group interval 2m,shotpoint interval 2m.Through shallow seismic sections to interprete roof and floor drainage ways have found 7 abnormal breakpoints.Contrast with revealed data has shown,the accuracy of 80% achived in interpretation of faults and anomalies.The prospecting example has demonstrated that the distance between roof,floor drainage ways and upper and lower crossheadings is 20-60m,the interpreattion for structure is signality to guide the production.
There are relatively less geological exploration data available during the development and production processes,making use of underground roof and floor conditions to carry out reflection seismic prospecting for near roadway coal seams can get coal seam oc curence data correctly.Taking the coal seam structure seismic prospecting in a working face in the Panji No.2 coalmine,Huainan as an example,after geological condtion analysis,two lines for roof and floor drainage ways each have been designed,in which,floor drainage way line layout along roof and two walls,while roof drainage way along floor and two walls.Test determined data acquisition offset is 10m,group interval 2m,shotpoint interval 2m.Through shallow seismic sections to interprete roof and floor drainage ways have found 7 abnormal breakpoints.Contrast with revealed data has shown,the accuracy of 80% achived in interpretation of faults and anomalies.The prospecting example has demonstrated that the distance between roof,floor drainage ways and upper and lower crossheadings is 20-60m,the interpreattion for structure is signality to guide the production.
引文
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[2]张银松,雷宛,祝杰,等.浅层地震反射波法的参数选择及其应用效果[J].勘察科学技术,2011,(4):14-29.
[3]周辉,谢春临,王尚旭,等.复杂地表地震资料叠前深度偏移成像[J].吉林大学学报(地球科学版),2012,42(1):262-268.
[4]刘盛东,张平松.地下工程震波探测技术[M].江苏徐州:中国矿业大学出版社,2008.
[5]单娜琳,程志平,丁彦礼.地震映像数据的时频分析方法及应用[J].地球物理进展,2007,22(6):1740-1745.
[6]张平松,刘盛东.煤岩体结构构造特征的频谱分析与应用[J].工程地球物理学报,2006(4):274-277.
[7]张平松,刘盛东,李培根.井巷煤岩体内构造特征反射波探测技术与应用[J].矿业安全与环保,2006,33(6):43-46.
[8]赵石峰,梁英.利用二维地震勘探圈定煤层中的岩浆岩[J].河北煤炭,2009(4):31-33.
[9]李希宝,朱文.矿井复杂地质构造综合探测技术应用研究[J].安徽理工大学学报(自然科学版),2010,30(3):13-16.
[10]马水平,王志宏,田永乐,等.地震反射同相轴的地质含义[J].石油地球物理勘探,2010,45(3):454-457.
[11]高福安.高分辨率地震勘探在矿井地质中的应用[J].中国煤田地质,1997,10(S1).
[12]李延清,程东光,裴承雯.地震波法在煤层赋存条件解释的应用[J].中国煤炭地质,2010,22(04).
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