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- The study shows that arch structure of spanning strata which parallels to its spanning coal seam,is formed above the working face in mining. 建立“跨层拱”结构的力学模型,对拱的受力、极限跨长以及拱形的确定等方面进行了分析;
- Analysis and Control Countermeasures of Fracture Water Irruption in Roof Sandrock of No.4 Coal Seam in Mine of Hengyuan Co. 恒源公司矿井4煤层顶板砂岩裂隙水突水分析及治理。
- How to extract thin coal seam remains a problem faced by all hydromines.Hydraulic mining of such seam in a hydromine proves to be superior to the conventional mining method. 薄煤层如何开采是水采矿井共同面临的一个问题,在水采矿井搞水采比搞旱采有优势。
- The coal seam of fully mechanized top-coal caving face 1151(3) in Xieqiao coal mine of Huainan mining area is soft and loose,and is of low permeability and poor wetting condition. 基于淮南矿区谢桥煤矿1151(3)综放面,煤层松软、渗透性低、湿润性差的特殊条件,采用煤层注水工艺技术降尘,在注水孔布置方式及参数、注水孔封孔工艺、注水工艺等方面采取一定的技术措施。
- And then studied the area channel flowed along and destructiveness to the coal seam, provide a reference for the mining of coal seam 8 in middle to deep part of the minefield. 并对古河流的流经区域和煤层的破坏程度作了研究,为井田中深部八煤层的开采提供了参考依据。
- We take the 14# coal seam of Xiaonan coal mine of Tiefa basin as an example and analyse the geologic agent systematically which influences the gas content. 未开采煤层瓦斯含量及影响因素研究,是煤矿安全生产的重要基础研究工作,以铁法盆地晓南矿未开采的14%23煤层为例,系统分析了影响瓦斯含量的地质因素。
- The movement of top coal and top roof is discussed with the data observed from the caving mining of deeply inclined thick coal seam with horizontal section in Zhaogezhuang colliery of Kailuan Group. 就开滦集团赵各庄矿在急倾斜厚煤层采用水平分段开采过程中的现场观测，探讨顶煤和顶底板运移。
- Writer analyzed systemically the mechanism and the influence factors of the spontaneous combustion in the coal seam by the research in the western open cut coal mine of Pingzhuang Coal Group Company. 通过对平庄煤业(集团)公司西露天煤矿的地质灾害调查,分析了煤层自燃的化学热力学机理和影响因素。
- She wore an expression of near fear. 她面露几近恐惧的神色。
- mining of closed distance coal seam group 近距离煤层群开采
- He's mine of information about insects. 他在昆虫方面有着渊博的知识。
- My neighbor is a mine of information about history. 我的一位邻居历史知识十分渊博。
- A good encyclopaedia is a mine of information. 一部好的百科全书是一座知识宝库。
- Numerical simulation was conducted using UDEC3.0 for the movement of overlaying strata and fracture development caused by the mining of upper protective layers of coal seams with close quarters. 本文利用UDEC3.;0软件对近距离上保护层开采导致的覆岩移动及裂隙发育过程进行数值模拟。
- The mining of ore or coal from an open mine. 从敞开的矿井开采矿石或煤。
- My grandmother is a mine of information about our family's history. 我的祖母是我们家史的资料库。
- Comprebensive Automatic Mining of Thin Coal Seam with Manless Working Face 综合自动化无人工作面开采薄煤层
- Previous HRTF measurement were lack of near field data. 以往在实际测量头相关传输函数时，缺乏近场数据。
- Research on Under-Village Strip Mining of No.3 Coal Seam in Yunhe Coal Mine 运河煤矿八采区3号煤层村庄压煤条带开采研究
- Achromatized Design of Near UV-visible Wide-angle Objective[J]. 引用该论文 白清兰;苗兴华.
