2) very soft coal seam
极软厚煤层
1.
Mechanism of the rib spalling and the controlling in the very soft coal seam;
极软厚煤层煤壁片帮与防治机理
3) much thicker soft seam
特厚极软煤层
1.
Directing to the special geology conditions of 8415 face cut hole in Zhuxianzhuang Coal Mine,the experiences of bolting support with wire mesh in the much thicker soft seam are introduced,and the cost of roadway support is also analyzed.
针对朱仙庄矿 84 15工作面切眼特殊的地质条件 ,介绍了高强锚杆 (索 )支护技术成功应用于特厚极软煤层的经验 ,并对巷道支护成本进行了分
4) especial incompact "three-soft" coal seam
极松散"三软"煤层
5) very soft and very thick outburst coal seam
极软特厚突出煤层
6) ultra soft weak coal
极散软煤
补充资料：极厚
1.极其优厚;极其丰厚。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条