您要查找的是不是:
- drilling in coal seam 煤层钻孔
- The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed. 摘要论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
- Outburst prevention technique of excavating in coal seam will be directly concerned colliery safety production and excavates taking over. 摘要突出煤层煤巷掘进防突直接关系到煤矿的安全生产和采掘接替。
- The studies also show that magnetized water has a good application prospect in coal seam infusion. 磁化水在煤层注水方面具有良好的应用前景。
- With the tectonic geological methods the development properties,the forming mechanics of faults in Coal Seam 11-2 in Payi Coal Mine are analyzed. 采用构造地质学的方法,对潘一煤矿井田内11-2煤层中断层的特征、发育规律及形成机制进行了分析。
- The workman is drilling in the wall. 工人正在墙上打孔。
- Little faults in coal seam are important for coal and gas outburst prevention and control,and water outburst prevention and control. 煤层小断层对矿井煤与瓦斯突出及矿井突水防治具有重要的实际意义。
- It used draining while mining and light &middle pressure water injection in coal seam, those completely eliminated the danger of coal and gas outburst. 在生产过程中,采用边采边抽和浅孔中压注水措施,完全消除了工作面的突出危险性。
- She had lots of drill in listening. 她在听力方面受过许多训练。
- 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。
- 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
- The Prussians are drilling in the meadow behind the sawmill. 普鲁士士兵在锯木厂后边草地上操练。
- The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock bunt under the condition of hard roof and hard floor. 在“两硬”条件下,煤层厚度与硬度的变化对煤体中的应力分布有着很大的影响,从而对煤岩体系统中冲击矿压的发生有着很大的影响。
- Research of Comprehensive Dustproof Technique on the Drill in the Coal Seam 煤层钻孔施工中综合防尘技术研究
- After several months of drilling in the desert, the prospectors struck it rich. 勘探者们在沙漠中花了几个月的时间钻井,终于钻出了石油。
- The relationships between the permeability of the methane gas in coal seam and surface fractal dimension and tortuosity fractal dimension are proposed based on fractal theory and Darcy Law. 基于分形理论和达西定律,研究了孔隙的弯曲分形维数和表面积分形维数与瓦斯渗透率参数之间的关系;
- Through 3 case studies,the paper introduced the PROTEM 67D transient electromagnetic system geological results when used in coal seam floor water abu ndant zone,water conducted zone and abandoned mine water prospecting. 通过矿区勘探的三个典型实例,介绍了PROTEM67D瞬变电磁系统在探测煤层底板富水区、导水通道老窑积水等方面的应用及取得的地质效果。
- The soldiers were at drill in the barrack-yard. 士兵们在兵营练兵场操练。
- It is concluded that the Gaussian curvature method can reflect the shape variation of coal seam curvature, and the method is effective to forecast natural fracture zones in coal seam. 分析表明,高斯曲率法可相对真实地反映煤层曲面形态变化,用该方法预测煤层天然裂隙发育区是切实可行的。
- Most drilling in metal is done with a twist drill. 大多数金属钻孔用的是麻花钻头。