基于分形方法确定火区氡值异常下限

Application of Fractal Method in Determining Fire Area Radon Anomalies Lower Limit

地下煤层自燃造成了煤炭资源的大量损失,给煤矿的安全生产和生态环境带来巨大威胁。为了能够准确地圈定火区的范围,采用活性炭测氡法来探测氡异常区的范围。以内蒙古某露天煤矿自燃火区测氡为例,运用分形理论中的含量-总量法和含量-频数法对比分析得到:含量-频数法确定的异常下限明显低于含量-总量法确定的异常下限,使部分氡高异常区(火区)范围未被丢失,经钻孔验证,与实验结论相符合,说明含量-频数法更适合于活性炭测氡法确定地下火区氡高异常下限。

Underground coal seam spontaneous combustion have brought great threat to mine＇s safety production and the ecological environment, caused losses of coal resources. In order to accurately delineate the scope of the fire area, used activated carbon radon measurement method to detect the radon anomaly area range. A measuring radon open-pit coal mine spontaneous combustion fire area in Mongolia as an example,Comparing and analysising the content of the theory of total and content- frequency methods of fractal theory to get：content-frequency method to determine the threshold is significantly lower than the total content of method to determine the lower limit, so some high radon anomaly（fire） range is not lost.It has been verified by drilling, consistent with the experimental conclusion, can draw the conclusion that content-frequency method is more suitable for radon measurement method to determine the underground fire area activated carbon high radon anomaly threshold.