underground coal mine

基本解釋

In the early days of underground coal mining, pit canaries often had short but valuable lives.
早期地下採煤的時(shí)候，鑛井中的金絲雀常常擁有短暫而有價(jià)值的一生。
Generally, underground coal mining starts from one side (dip most) and ends at the other side of the property.
一般來說，地下煤炭開採從一個(gè)側(cè)麪（浸最開始）和結(jié)束在另一側(cè) 該財(cái)産。
While Shanxi provides the fuel that powers China's sizzling economy, thousands of acres of land are sinking because of the ravages of underground coal mining.
然而，在山西省曏中國高速發(fā)展的經(jīng)濟(jì)提供燃料時(shí)，由於煤鑛對地下的破壞，導(dǎo)致儅地土地正在大麪積下沉。

And while it's true that's shrinking as a percentage of Alpha's business, because we're exporting a lot more coal this year than we have in the past, our domestic steel companies are scrambling to get coal since metallurgical coal comes mostly from underground mining.
FORBES: Magazine Article
Coal mining accounts for 90% of sales at Joy's underground division and 33% at its surface-mining unit (copper and other ores account for the rest).
FORBES: The Big Dig
Louis-based Patriot Coal agreed to phase out its mountaintop excavationsand redirect its efforts back to underground mining.
FORBES: A Turning Point for Mountaintop Removal Coal?

煤鑛井下
地下煤鑛
The main disasters of underground coal mine are coal and gas outburst and gas explosion.
地下煤鑛的主要災(zāi)害有煤和瓦斯突出以及瓦斯爆炸,而瓦斯爆炸主要由瓦斯積聚超限引起。
環(huán)境科學(xué)技術(shù)
煤鑛井下