基于分形理论确定地下煤层自燃火区范围

摘要

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 under-ground 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 anoma-lies, Through comparison, the bottom limit of anomalies was determined, and different extent of fire zone was lo-cated. It was found that the the fire extent located by fractal method was more reasonable.%　　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。