top-coal

基本解释

• 顶煤

同根派生

英汉例句

• The top coal broken mechanism and reasonable determination of caving coal heigh in caving coal faces are expounded.
  主要阐述了放顶煤工作面顶煤破碎机理及放煤高度的合理确定;
• It is key problem to raise the top coal recovery rate of the fully mechanized sublevel caving mining.
  提高顶煤放出率是综放开采的一个重大课题,预注水弱化顶煤是解决这一问题的有效方法之一。
• Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face.
  实践证明,孤岛综放工作面快速推进技术是可行的。
• 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.
  铜川焦坪矿区4-2%23煤层坚硬顶煤垮落破碎难题是严重影响矿井生产效益的"瓶颈"。
• This article introduced applications,observation and research's actuality and developing trend of fully mechanized top coal caving mining under water.
  介绍放顶煤开采技术在水体下采煤领域中的应用情况、观测研究现状及其发展趋势。