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- seam gateway heading face 掘进工作面
- in seam gateway heading 煤巷掘进
- In view of the problems occurring in trapezoidal support used in coal seam gateway, a novel small-curvature arch support for mining engineering is presented. 针对煤层顺槽梯形支架存在的问题，提出一种新型结构的小曲率拱型支架。
- The article analyzes the cause of coal and gas outburst in heading face and introduces ways,control gas outburst in heading faces with three-soft coal seam. 分析了煤巷掘进头发生煤与瓦斯突出的原因,介绍了“三软”煤层高突区域煤巷掘进头瓦斯综合治理的途径和措施。
- Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine. 超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。
- The charts were used to illustrate the dust distribution laws of coal mining face, heading face, during haulage, car-loading and tipping. 使用图表反映出采煤面、掘进工作面、运输过程、装车过程以及翻车时粉尘的分布规律。
- The reason of the formation of gas porosities and cracks on the head face of valve tappet has been studied. 本文分析了气门挺杆端面气孔、裂纹形成原因。
- I tossed my head facing the girl and gave IT a wink. 转头看到小女宝宝，于是我对她眨了眨眼睛。
- Survey and determination on roof strata structure in seam gateway 煤巷顶板岩层结构的探测与确定
- Bolt Support Technology for Seam Gateway Applied in Du'erping Mine 煤巷锚杆支护技术在杜儿坪矿的应用
- Research on new roof rock structure probe of seam gateway 新型煤巷顶板岩层结构探测仪的研究
- The characteristic of the disk type screwthread is that its radial size is far greater than axial size and it is processed out square thread on its head face. 盘型螺纹特点是其径向尺寸远远大于轴向尺寸,并在端面上加工出方牙螺纹,由于螺纹的旋向由外向里,其螺旋线由大变小。
- A lion in side view,having one forepaw raised and the head facing the observer. 狮像前爪抬起而且头面向观众的狮子侧像
- Design and construction of high pressure water gate wall in seam gateway 煤层巷道高压水闸墙的设计与施工
- This method has the advantages of no need of dismantling the cutterhead at heading face place, no need of setting up vertical shaft or operation corridor, less construction difficulty, quick reparation and low cost. 该方法无需在掘进面拆解刀盘、建竖井或工作廊道，施工难度小，修复速度快，费用低。
- Research on deformation law of bolt support in seam gateway near fault 锚杆支护近断层煤巷变形规律研究
- The practice demonstrates that the prediction to adverse geologic condition in front of the heading face by boring radar and BEAM electric method, especially to water-holding condition, is satisfied. 实践表明，采用钻孔雷达和BEAM电法探测技术对隧道掌子面前方的不良地质情况，尤其是含水情况具有较好的预测结果。
- Full twist equal strength steel bolt support in high stressed seam gateway 高应力煤巷全螺纹等强锚杆支护
- Support Technology for Gob-Side Entry Retaining Along Advanced Gateway Heading of Retreat Slicing Face 分层开采后退式超前掘进巷旁支护沿空留巷技术
- She nestled her head on his shoulder. 她将头依偎在他的肩上。
