您要查找的是不是：
- Keywords three soft coal seam;concentrated force;creeping way;infusing water to prevent outburst; 关键词三软煤层;集中应力;蠕变状态;注水防突;
- three soft coal seams “三软”煤层
- three soft coal seam 三软煤层
- "three soft " and unstable coal seam 三软不稳定煤层
- "three soft" in the thick coal seam “三软”中厚煤层
- "three soft" irregular coal seam “三软”不稳定煤层
- "three soft" unsteady thick coal seam “三软”不稳定厚煤层
- Usage and study on the powered support of "three soft" coal seam "三软"煤层综采液压支架使用与探析
- Soft Coal Seam Winning in High Gas Area 高瓦斯区松软煤层沿顶布巷综放回采
- The safe construction under the alluvium coal column of "Three Soft" coal seam "三软"煤层冲积层煤柱下安全施工
- Practice on the high degree support in the "Three Soft" coal seam tunnel 高强预应力支护在"三软"煤层巷道中的实践
- Research of bolting in soft coal seam with high earth stress 高地应力松软煤层锚杆支护应用研究
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Application of combined supporting in support removing supporters during "three soft" heavy coal seam mining 锚网索支护在"三软"厚煤层综放支架拆除中的应用
- Roof Control of Tunnls of Full-mechanized Caving Mining Face in Soft Coal Seam 软煤层综放工作面两巷顶板管理
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- Technology of Gas Control in "Three soft" Coal Seam Excavate Working Face of Chaohua Coal Mine 超化煤矿"三软"煤层回采工作面瓦斯治理技术
- Foam Fluid's Application on Drilling in Soft Coal Seam for Gas Drainage 泡沫冲洗液在松软煤层中钻进瓦斯抽放孔的应用
- 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
- Soft coal burns with more flames than hard coal. 烟煤燃烧时火焰较无烟煤多。
