煤炭技术

为了精确圈定公乌素煤矿小窑火区的位置和范围，采用测氡法对小窑周围地面氡值进行探测，利用传统统计法确定氡含量背景值，通过Sufer软件划分氡值异常区域，对比钻孔采空区温度探测结果，验证地面测氡法确定的小窑高温区域。结果表明：公乌素煤矿小窑区域内氡含量背景值1 653 Bq/m³，标准差1 650 Bq/m³。划分三级氡浓度异常带，分别为偏高晕(3 303～4 953 Bq/m³)、高晕(4 953～6 603 Bq/m³)和异常晕(≥6 603 Bq/m³)。预测小窑火区6处，总面积约459 m²。A₁、A₂和C₁钻孔区域16~#煤层小窑采空区存在煤自然发火现象，高温区与氡值异常区高度吻合，验证了测氡法探测小窑火区的精确性。

In order to accurately delineate the location and scope of the small kiln fire area in Gongwusu Coal Mine, the radon measurement method was used to detect the ground radon value around the small kiln. The abnormal area of radon value was divided by the Sufer software, and the temperature detection results of the borehole goaf were compared to verify the high temperature area of the small kiln determined by the ground radon measurement method. The results show that the background value of radon content in the detection area of Gongwusu Coal Mine is 1 653 Bq/m³, and the standard deviation is 1 650 Bq/m³. The three levels of radon concentration anomaly zones are divided into slightly high halo(3 303-4 953 Bq/m³), high halo(4 953-6 603 Bq/m³), and abnormal halo(≥6 603 Bq/m³). Six small kiln fire zones were predicted, with a total area of approximately 459 m². There is a phenomenon of coal spontaneous combustion in the goaf of the small kiln of the No.16 coal seam in the A₁, A₂, and C₁ drilling area, and the high temperature area is highly consistent with the radon value anomaly area, which verifies the accuracy of the radon measurement method in detecting small kiln fire areas.