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30#层为东荣三矿主采层,煤层厚度0．5～6．5m。在东九采区、东八采区煤层赋存较厚,绝大多数区域厚度在3．5m以上。回采设备先后采用ZZ/6000/25/50重型综采支架一次采全高和ZFB/2400/16．5/25轻型放顶煤支架放顶煤回采。
Layer 30 is the main ore layer of Dongrong No.3 Mine with thickness of 0.5-6.5m. In the East 9 mining area, the coal seam in the East 8th mining area is thick, and the thickness of most areas is above 3.5m. The mining equipment has adopted ZZ / 6000/25/50 heavy-duty fully mechanized mining support once full-height and ZFB / 2400 / 16.5 / 25 light-weight caving support put top coal mining.