top-coal

基本解釋

The top coal broken mechanism and reasonable determination of caving coal heigh in caving coal faces are expounded.
主要闡述了放頂煤工作面頂煤破碎機(jī)理及放煤高度的合理確定;
It is key problem to raise the top coal recovery rate of the fully mechanized sublevel caving mining.
提高頂煤放出率是綜放開(kāi)采的一個(gè)重大課題,預(yù)注水弱化頂煤是解決這一問(wèn)題的有效方法之一。
Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face.
實(shí)踐證明,孤島綜放工作面快速推進(jìn)技術(shù)是可行的。
The caving of hard top coal of 4-2# coal seam in Tongchuan Jiaoping Coal Mining Area seriously impacts the production efficiency of the mine.
銅川焦坪礦區(qū)4-2%23煤層堅(jiān)硬頂煤垮落破碎難題是嚴(yán)重影響礦井生產(chǎn)效益的"瓶頸"。
This article introduced applications,observation and research's actuality and developing trend of fully mechanized top coal caving mining under water.
介紹放頂煤開(kāi)采技術(shù)在水體下采煤領(lǐng)域中的應(yīng)用情況、觀測(cè)研究現(xiàn)狀及其發(fā)展趨勢(shì)。