您要查找的是不是：
- extra- thick soft coal seam 特厚极软煤层
- Soft Coal Seam Winning in High Gas Area 高瓦斯区松软煤层沿顶布巷综放回采
- 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
- 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
- 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
- Study on technique of coal seam infusion in soft coal at Xiandewang Coal Mine 显德汪矿软煤层综采工作面煤层注水工艺研究
- Analyzing the layout and the construction of the cut in top-coal caving face of soft coal seam 软煤层综放切眼布置设计及施工工艺探析
- Top coal caving technology in high inclination-angled soft coal seam with hard roof and soft bottom 坚硬顶板软煤软底大倾角综放开采技术
- Thick soft fur lying beneath the longer and coarser guard hair. 在长而粗糙的真毛下面的厚而软的绒毛。
- Innovation and Application of Deep-hole Drilling Technology in Outburst Soft Coal Seam 突出松软煤层深孔打钻工艺的创新与应用
- Research has been in progress round the technology difficult problem that mines in the thick coal seam of extremely soft rock and easy self-ignition of TieFa coal industry group by this thesis.1. 本论文围绕铁法煤业集团小康矿极软岩层、易自燃厚煤层开采的技术难题进行了研究。
- Applied Study of Secondary Support Technique for Development Roadway in Soft Coal Seam 软煤层开拓巷道二次支护技术的研究
- Research has been in progress round the technology difficult problem that mines in the thick coal seam of extremely soft rock and easy self-ignition of TieFa coal industry group by this thesis. 本论文围绕铁法煤业集团小康矿极软岩层、易自燃厚煤层开采的技术难题进行了研究。
- Usually for mining maximal coal resources,repeated mining is used especially in specially thick coal seam. 为了最大限度的开采煤炭资源,通常进行复采,尤其是特厚煤层。
- Soft coal burns with more flames than hard coal. 烟煤燃烧时火焰较无烟煤多。
- Water-coal mixture burst is a new mine disaster in exploiting steeply inclined thick coal seam mining. 摘要急倾斜厚煤层开采时发生的水煤体溃泄是一种新的矿井灾害。
- But the pubic only has soft coal, no any char. 可公家只有烟煤，没有干炭。”
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- The bridge abutment No.0 sits on the foundation of rock-socketed pile groups embedded in thick soft groundsill. 桥台南侧为粉喷桩结合土工格栅处理的高填方路堤连接段。
