For dual energy Gamma ray coal ash gauge, the error induced by inten sity averaging is consisted of two parts, the error caused by thickness change and by ash content change The magnitudes of the two errors are compared using app roximate analytical expre
For dual energy Gamma ray coal ash gauge, the error induced by inten sity averaging is consisted of two parts, the error caused by thickness change and by ash content change The magnitudes of the two errors are compared using app roximate analytical expre
定向断裂爆破技术是利用聚能管改变巷道周边眼装药结构，爆破时，利用聚能作用控制裂隙的方向和数量，以获得较好的爆破效果的技术；它与传统的光面爆破技术有较大的差别。