The result indicates there is a correspondent relation between the eme and distribution of the stress state in the stress concentration belt , it is an innovation to ascertain the solid coal smear zone with electromagnetic radiation monitor technology to get the stress concentration belt engendered by the coal wedge of the protective coat 结果表明：电磁辐射信号与应力集中带应力状态分布有较好的对应关系，可以电磁辐射监测技术确定保护层采空区煤柱产生的应力集中带，是确定煤柱影响带的一种新方法。
