1) superjacent bed
上层;顶板
2) the overlying strata
顶板上覆岩层
3) top plate
上夹板，顶板
4) seam roof
煤层顶板
1.
Design and application of horizontal long borehole for gas drainage in seam roof;
煤层顶板瓦斯抽放水平长钻孔的设计与应用
2.
There are 6 types of REEs in coals and seam roofs: water\|soluble state (Ⅰ), ion\|exchangeable state(Ⅱ), carbonate state(Ⅲ), organism\|bonded state(Ⅳ), sialic state(Ⅴ),and sulfide state(Ⅵ).
在煤层顶板中 ,以硅铝化合物和硫化物结合态的稀土元素含量随着原子序数的增加而减少 ,以有机质结合态的稀土元素随着原子序数的增加而增加 ,且和煤层中稀土元素的赋存状态不同 ,表明不同沉积环境以及相同沉积环境对不同物质中的稀土元素的分馏效应是不同的 。
5) stratified roof
层状顶板
1.
Application of the contact element method in analyzing the separation and deformation of the stratified roof;
接触单元法在层状顶板离层变形分析中的应用
2.
By using the analyzing code called rock destroy process(RFPA~(2D)) analysis,the distortion destroy characteristic of tunnel with stratified roof and the destroy rules of tunnel with stratified roof under different lateral pressure and different ratio of thickness to span were analyzed.
利用东北大学自行开发研制的岩石破裂过程分析软件(RFPA2D),分析了层状顶板巷道围岩的变形破坏特征,以及不同侧压条件下和不同厚跨比条件下层状顶板的破坏规律。
3.
The model is based on the nonlinear contact theory and constructed with the study results of the roof characters of full seam roadway with stratified roof and large section in Daning coal.
为研究层状顶板在巷道开挖后的离层变形特征,确定顶板离层的准确位置,根据非线性接触理论,针对大宁煤矿大断面全煤巷道层状顶板结构特征,层间接触面采用状态非线性模拟的方法,构建了有限元计算模型,并运用ANSYS计算软件进行了数值模拟。
6) roof bed separation
顶板离层
1.
The successful application of roof bed separation system realized synchronization monitor and can carry out effective ore pressure analysis.
顶板离层系统成功应用,实现巷道顶板离层的同步监测,可以进行有效的矿压分析,起到了验证和修改初始设计的作用,在发现顶板离层值超限后,可以及时对巷道采取补强措施,确保了巷道支护的安全,便于矿井对生产一线的信息掌握。
2.
Based on the measuring methods of roof bed separation and combined with the spot practice, the beeline displacement sensor made up of Hall components are provided, which realize the untouched measuring of roof bed separation.
根据顶板离层的测量原理,结合现场实际,提出了以霍尔元件为基础的直线位移传感器,实现顶板 离层量的非接触测量,采用以单片机为核心的微电子技术实现监测信号的处理、显示、报警及传输功能,同 时实现在地面生产指挥中心对矿井巷道顶板离层状态的实时、远程监控。
3.
Most of the monitoring systems for roof bed separation are designed based on RS-485 BUS,which is low in both signal transmission efficiency and reliability.
国内顶板离层计算机测控系统多采用RS-485总线,传输效率低,可靠性不高。
补充资料：上层
1.层状物的上面一层。多指建筑物。 2.指社会成员中地位高的那一部分人。 3.指组织机构中的上一级组织。
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