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- 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。
- Many modelling results have showed that the resistivity curves reflect obviously the variation of coal thickness,which are enabled to measure the coal seam with the thickness mors than 0 8m. 结果表明,电阻率曲线对煤厚变化反映明显,能探测厚度大于0.8m的煤层。
- Keywords diastrophism;variation of coal seam;law; 构造变动;煤层变化;规律;
- The paper introduces the sedimentary environment of coal and coal?bearing strata,the properties of coal seams and the causes resulted in the variation of seam thickness in laung mining district,Kalimantan Tengah,Indonesia. ? 介绍了印尼中加里曼丹拉翁煤矿区煤和含煤岩系的沉积环境、煤层特征以及引起煤厚变化的原因。
- Influence adaptability of dragline to variation of coal seam thickness during mining operation period of large surface coal mine 露天煤矿拉斗铲作业对煤层厚度变化影响
- variation of coal seam 煤层变化
- This paper analyzes on the influence of the variation in thickness of coal seam and the supporting method on the coal quality,and based on this,advances some measures for reducing the gangue production to improve the coal quality on the tunneling faces. 分析了煤层厚度变化和支护方式对煤质的影响,在此基础上提出了若干减少出矸以提高掘进工作面出煤质量的措施。
- The space-time variation of the typical elements content in covering soil of coal mine reclamation area. 矿山复垦土壤典型元素时空变化研究。
- Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation. 煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
- The authors used the Analytic Hierarchy Process(AHP) in the researches of coal seam floor water-irruption. 将系统工程中的层次分析法引入煤层底板突水的研究中。
- The reserves of thin coal seam shearer and the developing trend of coal seam shearer of our country are analysed. 分析我国薄煤层储量以及薄煤层采煤机的发展状况及趋势。
- Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing. 煤层气的勘探评价,是开展煤层气勘探与开发工作的基础。
- The song sounds like a variation of a very old and familiar tune. 这首歌像是一个熟悉的旧曲调的变奏曲。
- Acc ording to the validation result ,it is proved true of the 3D high precision expl anation that the variation of coal thickness is mainly controlled by the ancient sedimentary environmen... 而且,与实际揭露相比,三维地震资料的煤厚预测精度较高,为矿井的采区划分、安全生产和巷道布局提供了可靠的地质依据。
- After integra ted interpretation of the hole core, well-logging and 3D data, it is found out why the variation of coal thickness in Hole T4 and the trend of coal thickness in this region. 后期的地面钻探补充勘探结果表明:通过对三维地震信息的综合地质解释,认为该区煤层厚度变化主要是沉积原因的结论是正确的;
- The test results show that the drawing interval of 1.5 m is helpful for controlling dead-unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top-coal. 试验结果表明,放煤步距采用三采一放有利于控制顶板极松散细砂岩,降低放出顶煤的含砂率。
- Impact in variation of line impedance. 系统阻抗变化之影响。
- A variation of ten pounds in weight. 在重量上十磅的变化量
- An inversive research method was proposed through analyzing the complicated changing features of permeability of coal seam and the problems existing in actual measurement. 分析了煤层渗透率的复杂变化特点和实际测量上存在的问题,提出其反演方法。
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