采掘工作面前方煤体应力分布和冲击地压的发生有密切关系,而煤岩受载产生电磁辐射与受载应力之间呈现对应关系,通过在两巷内帮煤体施工钻孔并测试钻孔电磁辐射,可以间接得到工作面前方煤体内应力分布规律。以峻德矿三水平北17#煤层三、四区一段煤层具有较强的冲击危险性为例,采用钻孔电磁辐射法分析煤体应力分布特征,为冲击地压的预防提供依据。
Aimed at the close relationship between rock burst and stress distribution on coal mass in front of driving face, together with the corresponding relationship between electromag- netic radiation caused by coal and rock under loading and loading stress, the innerstress distribu- tion law of front coal mass was obtained indirectly by testing the electromagnetic radiation in boreboles via drilling on the inner coal mass of two roadways. In view of the high burst risk in a section of coal seam located on the third or fourth zone in three level north No. 17 coal seam of Junde Coal Mine, the characteristics of stress distribution on coal mass were analyzed by using borehole electromagnetic radiation, providing the basis of the prevention of rock burst.