基于分形含量-总量法确定氡值异常下限

Determination of Abnormal Lower Limit of Radon Value Based on Fractal Content-Total Method

为了准确圈定煤炭地下气化燃烧工作面范围,采用活性炭吸附氡能谱测量监测煤炭地下气化燃烧区,分别计算出基于统计学方法和分形含量-总量法的氡值异常下限,并绘制监测氡值分布等值线图进行对比研究。结果显示:采用分形含量-总量法计算的异常下限较统计学方法计算的异常下限小,圈定的地下气化燃烧区位置范围较统计学方法圈定的范围准确,说明采用分形含量-总量法确定的氡异常下限较统计学方法计算结果更符合煤炭地下气化工程实际。

In order to accurately delineate the scope of underground coal gasification and combustion working face,the active carbon adsorption radon energy spectrum measurement was used to monitor the underground coal gasification combustion area.The abnormal lower limit of radon value based on statistical method and fractal content total method was calculated respectively,and the contour map of monitoring radon value distribution was drawn for comparative study.The results show that the anomaly lower limit calculated by fractal content total method is smaller than that calculated by statistics method,and the location range of underground gasification combustion area delineated is more accurate than that delineated by statistics method,which indicates that the lower limit of radon anomaly determined by fractal content total method is more consistent with the actual situation of underground coal gasification project than that calculated by statistics method.