1) top roof and top coal
顶板顶煤
2) 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 。
3) coal pile plate
煤柱顶板
1.
This paper introduces theoretical research and working practice of Jushan Coal Mine Limited Company by abandoned coal resource recovery under knife pile and summarizes a set of scientific method to control coal pile plate and coal capitals have achieved good effect.
介绍了莒山煤矿有限公司通过对刀柱下弃置煤炭资源回收工作的理论研究和工作实践,总结出一套煤柱顶板及煤帮控制的科学方法,并取得了较好的应用效果。
5) coal roof
煤层顶板
1.
Aqueous characteristics of No. 3 coal roof sandstone in Yanzhou mining area;
兖州矿区3号煤层顶板砂岩含水层水文地质特征研究
2.
Based on the analysis on seismic attributions,an analysis method of seismic attributes and prediction method of lithologic characters based on a BP artificial neural network were proposed for forecasting the mudstone percentage content of coal roof.
从地震属性分析入手,提出了用于煤层顶板泥岩百分比含量预测的地震属性分析方法和BP人工神经网络岩性预测方法。
6) roof
[英][ru:f] [美][ruf]
煤层顶板
1.
Research on the tectonic synthesis method of prediction roof stability and its application;
煤层顶板稳定性预测构造解析法研究与应用
补充资料:综采放顶煤
综采放顶煤:厚煤层煤炭开采技术之一。把原来分层开采的煤炭,一次采完。方法是,在煤层底部按传统方法开采,使上面的煤炭在矿压的作用下,自动落下来。
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