测氡法在浅埋煤层火区探测中的应用

Application of radon method in detection of fire area in shallow coal seam

煤火灾害中火源位置和范围的确定一直是火区治理的重点和难点。为了明确刘家峁煤矿外因形成火区的位置和范围,为火区治理总体方案设计提供理论依据,彻底有效治理火区,采用测氡法,通过地面对刘家峁煤矿埋深50~60 m煤层因外因形成的火区进行了探测。结果表明:氡法探测火源技术在浅埋煤层外因火灾形成的火区中对位置和范围确定是切实可行的,探测出火区共有氡异常区域14个,地表面积约5 050 m2,确定该区域为温度异常区域,通过钻孔温度验证了火源位置和范围的准确性。火源位置和范围的确定是火区治理方案制定的关键,也可为国内同类问题的解决提供参考。

The determination of location and scope of fire source in coal fire disaster has always been the focus and difficulty.In order to define the location and scope of the fire area caused by external factor in LiuJiamao coal mine,to provide theoretical basis for overall scheme design of fire control,and to control the fire area thoroughly and effectively,using the radon measurement method we detected the fire area through the ground,caused by external factor,in coal seam at buried depth of 50~60 m of Liujiamao coal mine.Results show that,the technology of radon method to detect external cause fire source in shallow seam and to determinate the location and scope,is feasible.A total of 14 radon abnormal area were detected in fire area with the surface area of 5 050 m 2 as the temperature anomaly area,and fire source position and scope were verified by temperature of borehole.The determination of source location and scope is the key to the establishment of fire area management plan,which provides reference for the solution of similar problems in China.