1) the overlying strata
顶板上覆岩层
2) roof overburden
顶板覆岩
1.
Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face;
综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
3) overlying strata
上覆岩层
1.
Analysis on the mechanism of the face-contacted blocks structure in overlying strata above the longwall face;
采场上覆岩层面接触块体结构的力学机理分析
2.
Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf
长壁开采上覆岩层损伤范围及上行开采的层间距分析
3.
Based on the experiment with similar material,the laws of the extra subsidence on the surface and the stress vary inside overlying strata by newly increased load on the surface above worked-out area formed by fully mined and partial mined were researched.
通过相似材料模拟实验,研究了全部开采和部分开采条件下的采空区在地表新增荷载后,地表附加沉降和采空区上覆岩层内应力的变化规律。
4) overburden
[英][,əʊvə'bɜ:dn] [美]['ovɚ'bɝdṇ]
上覆岩层
1.
Underground coal seam mining,stope roof caving,overburden subsidence,destruction and even surface settlement is a entire process,a unified system.
通过比值法、"三带"判别法、围岩平衡法、数理统计法对七五煤矿下组煤上行开采的可行性进行了研究论证,得知上行开采是可行的;为上行开采的上覆岩层运动规律理论分析与可行性研究论证提供了重要经验和借鉴。
2.
The casing deformation caused by sand production of unconsolidated sandstones and caving of the overburden is studied .
以东濮凹陷WZ油田历年井况大调查套管损坏资料为依据,在对出砂油井套管损坏形态、层位与射孔状况、岩石性质等因素进行综合分析基础上,对疏松砂岩出砂、上覆岩层坍塌等主要方面导致的套管受力变形进行研究,为探讨及防治措施提供依据。
5) roof strata
顶板岩层
1.
Dynamic events in roof strata-occurrence and prevention;
顶板岩层动力事件发生机理与防治方法
2.
Instability behavior for roof strata in shallow seam longwall mining;
浅埋煤层长壁开采顶板岩层的不稳定性态
3.
The instability of the gob roof will cause slow or catastrophic damage to the cover rock in strip mining, the instability and failure mechanism of the gob roof strata can be studied by catastrophic theory.
采空区顶板的失稳会导致条带开采覆岩系统缓慢或突变性的破坏,采用突变理论可以揭示采空区顶板岩层破坏失稳机理。
6) roof stratum
顶板岩层
1.
The effects of roof stratum\'s physical properties,geometry parameters and movement states on rock burst danger were analyzed by numerical simulation with UDEC4.
0对煤层上覆顶板岩层的物理、几何属性及运动状态对煤体冲击矿压危险性的影响规律进行了模拟研究。
2.
Aiming at the influence effects of roof stratum on rock burst,the research methods of physical simulation experiment in laboratory,UDEC 4.
针对顶板岩层对煤体冲击的影响作用机理,采用实验室物理模拟试验、UDEC 4。
补充资料：有机覆层:有机覆层
在基体材料表面覆以有机材料的材料保护层。在机械製造中﹐有机覆层的绝大部分是涂装层﹐或称油漆层。此外﹐也有用橡胶或塑料作为覆层的。需要抗酸﹑硷和抗腐蚀性气体和液体的钢铁件﹐常用厚约 3毫米的橡胶(如氯丁橡胶)或塑料(如氯化亚乙烯共聚物)黏在表面﹐可长期保护基体不受腐蚀。这种覆层主要用在大型抗蚀容器或排气系统中。埋在土壤中的金属构件﹐常以聚乙烯带包裹保护。在喷鉬或喷不锈钢的表面上涂覆聚四氟乙烯﹐在150℃温度下摩擦係数很低﹐磨损轻微﹐适於製造低载荷和要求高度清洁的滑动轴承﹐或用在食品﹑精细包装和纺织机械上。各国的Du﹑Dx轴承都是以塑料与金属复合製成的。通过静电喷涂将环氧树脂﹑氯化聚醚﹑聚四氟乙烯以及聚氯乙烯等塑料粉末涂覆在金属表面﹐可获多种抗化学腐蚀性极好的覆层﹐可用於输水﹑污水处理和海洋平台的设备上。有机覆层在辉光放电情况下﹐有机单体可以聚合成无针孔的有机膜﹐用作电容器的介质层。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条