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- 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。
- 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 ratio of excavating thickness to caving thickness of coal seam 采放比
- Discussion on causes for diversities of thickness of coal seam No. Three3 in Cheji field 车集井田三3煤层厚度变化原因探讨
- Keywords thickness of coal seam;change;trend surface analgsis;orientational gradient;variation coefficient; 煤层厚度;变化;趋势面分析;方向梯度;变异系数;
- thickness of coal seams 煤层厚度
- The main coal seam of Taiping colliery is 11~# coal seam with a thickness of 1.5 m. 太平煤矿主采11%23煤层;煤厚1.;5 m
- overall thickness of coal seam 煤层总厚度
- thickness of coal seam 煤层厚度
- From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam. 以哈尔斯法为例,将相遇折射波法用于剩余煤厚探测中,具有精确、高效、快速的特点。
- 7.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. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
- 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。
- Based on the lithology, thickness of aquifuge and changes of the rock between Ordovician limestone aquiferous to lower-group coal seam, the watertightness of aquifuge are evaluated. 对矿区内奥灰含水层与下组煤之间隔水层的岩性、厚度及变化进行了分析，并对隔水层的隔水性能做出了综合评价；
- The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
- The beam has a thickness of 3 inches. 这根梁厚3英寸。
- 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。
- 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。
- A single thickness of a split hide. 皮厚一层被剥下的皮的厚度
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- 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。
