基于分形理论确定地下煤层自燃火区范围
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摘要
探测地下煤层自燃火区位置与范围较为有效的方法是地面氡气测量。针对传统地面氡气测量方法存在特定条件限制、地球化学意义不明显的不足,通过分析地下煤层自燃火区地面测氡采集到的数据,分别应用传统方法和分形理论的含量-总量法、含量-周长法确定氡值的异常下限。通过比较三者确定的异常下限以及所圈定火区范围的不同,发现分形方法圈定的火区范围更加合理。
The effective way for detection of the position and the extent of spontaneous fire in underground seams is to measure the radon on the surface.Aiming at the insuffisance that there are restriction of specific conditions and the geochemical significance is not clear in radon measurement on the surface,through the analysis of underground coal combustion data collected by radon measurement on the surface,the paper uses the trational method,the content-sum method of the fractal theory and content-perimeter to determine the bottom limit of radon anomalies,Through comparison,the bottom limit of anomalies was determined,and different extent of fire zone was located.It was found that the the fire extent located by fractal method was more reasonable.
The effective way for detection of the position and the extent of spontaneous fire in underground seams is to measure the radon on the surface.Aiming at the insuffisance that there are restriction of specific conditions and the geochemical significance is not clear in radon measurement on the surface,through the analysis of underground coal combustion data collected by radon measurement on the surface,the paper uses the trational method,the content-sum method of the fractal theory and content-perimeter to determine the bottom limit of radon anomalies,Through comparison,the bottom limit of anomalies was determined,and different extent of fire zone was located.It was found that the the fire extent located by fractal method was more reasonable.
引文
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[13]汪伟,张颖慧,袁峰,等.基于分形方法确定合肥大兴地区土壤中Cd元素的异常下限[J].环境科学与管理,2009,34(5):27-30.
[2]刘鸿福.氡及其子体运移的实验研究与机理探讨[D].成都:成都理工大学,1997.
[3]刘鸿福,白春明,舒祥泽.用测氡技术探测煤矿地下火区的研究[J].煤炭学报,1997,22(4):402-405.
[4]施俊法,向运川,王春宇.区域地球化学异常空间分形结构及其意义[J].矿物学报,2000,20(1):68-72.
[5]李建东,龚庆杰,窦金龙,等.分形理论在勘察地球化学中的应用[J].中国矿业,2006,15(11):91-94.
[6]HERZFELD U C.A method for seafloor classification using direc-tional variogram,demonstrated for data from the western flank of the Mid-Atlantic Ridge[J].Mathematical Geology,1993,25(7):901-924.
[7]成秋明.多重分形理论与地球化学元素分布规律[J].地球科学,2000,25(3):311-318.
[8]MANDELBROT B B.Statistical self-similarity and fractional di-mension[J].Science,1967,155:636-638.
[9]韩东昱,龚庆杰,向运川.区域化探数据处理的几种分形方法[J].地质通报,2004,23(7):714-719.
[10]TURCOTTE D L.分形与混沌-在地质学和地球物理学中的应用[M].北京:地震出版社,1993.
[11]龚庆杰,张德会,韩东昱.一种确定地球化学异常下限的简便方法[J].地质地球化学,2001,29(3):215-220.
[12]陈聆,魏友华,郭科.用含量面积法确定深切割地区地球化学异常[J].西南师范大学学报,2004,29(5):867-869.
[13]汪伟,张颖慧,袁峰,等.基于分形方法确定合肥大兴地区土壤中Cd元素的异常下限[J].环境科学与管理,2009,34(5):27-30.
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