英语释义

• a hard natural coal that burns slowly and gives intense heat

英汉例句

• the 「 shallow is be the deep and hard a plank, hard coal seam is high to produce efficiently modern mine a technique」 of development, main solution below technique hard nut to crack.

  ④开发「浅埋深、硬顶板、硬煤层高产高效现代开采成套技术」，主要解决以下技术难题。

• based on the difference between hard coal and deformed soft coal on physical characteristics, analyzing the response that deformed soft coal seam is on well log.

  基于构造软煤与硬煤的物性差异，分析构造软煤分层在测井曲线上的响应特征；

• gelsenkirchen was mentioned in a document for the first time in 1147. the discovery of hard coal in mid- 1900 triggered the industrialisation of the gelsenkirchen area.

  盖尔森基兴首次被提起是在1147年的文件里，19世纪中在这里发现了丰富的煤矿资源使得这座城市工业化。

• drilling borehole in hard coal seam is mostly used to discharge gas, and cross layer borehole, roof rock borehole and laneway are mainly used to discharge gas in soft coal seam.

  对于容易成孔的硬煤层采取本煤层鉆孔预抽瓦斯，对于难成孔的松软煤层采取邻近层巖石长鉆孔、穿层鉆孔以及巷道抽采。

• the first caving roof sections in hard coal layers can effectively reduce the pressure during the course of caving and guarantee safe production and efficiency.

  坚硬煤层顶板分段初次放顶，能够有效缓解放顶期间的顶板压力，保证安全生产，提高生产效率。

• soft coal burns with more flames than hard coal .

  烟煤燃烧时火焰较无烟煤多。

• the paper held that the two leg shield caving powered support would not be suitable for the top coal caving mining in the hard coal seam and the joint crack undeveloped medium hard seam.

  故两柱掩护式放顶煤支架不适用于硬煤层及节理裂隙不发育的中硬煤层放顶煤开采。

• the research on the fractured blocks of the top coal in the longwall top coal caving technique of the hard coal seam;

  对坚硬顶煤预裂中存在的问题 ，采用在地应力场控制下水力压裂的方法 ，研究了煤层地应力场控制参数 。

• pyrolysis performance of admixture with hard coal and corn stalk in different heat rate.

  图3不同升温速率下的无烟煤和稻秸秆共热解曲线fig。

• one topic of high-performance underground hard coal production gaining increasing importance is that of efficient gas removal.

  高效率的井下硬煤生产受到越来越多的重视，其中的一个话题就是瓦斯的有效抽采。

• f. injection are measured and the experimental studies on the pulverized bituminous and hard coal mixing-injection are made.

  根据研究结果，讨论了烟煤混入量对高炉喷吹操作和喷吹效果的影响；

相似词

coal供煤；采煤，提炼煤；把……烧成炭；加煤