您要查找的是不是：
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- Coal seams intermixed with iron ore . 煤层和铁矿混杂在一起。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
- The outburst-proneness of 6# coal seam are studied with five indexes. 采用5种指标对该矿6%23煤层冲击倾向性进行了实验研究。
- The thicker coal seams are located in a 10-15 kmwide belt along which the channel meanders. 较厚的煤层位于河道发生弯曲的、宽10-15公里的地带内。
- The thicker coal seams are located in a 10-15 km wide belt along which the channel meanders. 较厚的煤层位于河道发生弯曲的、宽10-15公里的地带内。
- The State shall encourage coal mining enterprises to carry out second mining or extract residual coal at the margins of mining areas and very thin coal seams. 国家鼓励煤矿企业进行复采或者开采边角残煤和极薄煤。
- However,recent explorations have shown that the Zhiluo Formation also has some minable coal seams in a certain area. 二道岭矿区侏罗系的成因属鄂尔多斯中生代盆地西缘的陆相碎屑沉积,岩石地层自下而上为富县组、延安组、直罗组和安定组。
- Prewetting of coal seams by water infusion is an essential measure for dust control at working faces. 煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。
- No.6 and 7 coal seams are anthracites characterized by low ash,super-low sulf... 近南北向和北北东向的断裂为正断层,对马头岭赋煤向斜构造造成切割破坏,使西翼浅部煤层未能保存。
- Industrial important coal seams in the basin's northeastern side along the strike are predicted. 预测在盆地东北侧沿走向应有工业价值的煤层存在。
- For decades the thick coal seams underneath it made Saarland a pawn in the power-games of Germany and France. 几十年来，萨尔州地下厚厚的煤层使得该州成为德国和法国权利游戏中的有利工具。
- The geological background of erosion zones in coal seams in Tiefa area is discussed. 论述了铁法矿区冲刷带发育的地质背景;
- When the organic fragments are abundant,then low ash,thick coal seams can be formed as allochthonous coal. 由于有机碎屑物质的密度低，在二次搬运和沉积过程中经过重力分异，有机碎屑通常富集在扇体顶部，形成异地煤层。
- 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。
- With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining. 摘要随着煤矿开采深度增加，综放开采回采巷道易发生冲击地压危害。
- Based on Darcy's law,one kind of the equation for gas flow in coal seams has been correctedand reestablished in this paper. 本文在达西定律基础上,修正了一类煤层瓦斯流动方程。
- The layers under coal seams in the study area generally containing fluvial sediments suggested that the coal developed in fluvial system. 不同层位的煤层,其下面普遍有河流相沉积,说明煤层是在古河流基础上发展起来的;
