Sentences with phrase «underground coal seams»

In mountaintop - removal mining, underground coal seams are exposed by blasting away summits or ridges above them.

Centralia, Pennsylvania, had to be permanently evacuated, for example, after a 1962 trash fire reached an underground coal seam that has been burning ever since.

Not exact matches

Groundwater can be another source of sulfur in rivers when it comes in contact with underground coal or pyrite seams.

Another method for reducing methane emissions, whether underground or on tracks of surface mining, lies in degasifying coal seams prior to extraction.

Pilot projects in Algeria, Japan, and Norway indicate that CO2 can be stored in underground geologic formations such as depleted oil and gas reservoirs, deep coal seams, and saline aquifers.

The discovery of high levels of helium in UK coal seams could help scientists to monitor the secure recovery of coal or shale gas from underground sites.

Scientists think that carbon dioxide could potentially be stored in three types of underground locations: depleted oil and gas fields, unminable coal seams and briny aquifers.

In Australia carbon dioxide could theoretically be sequestered in depleted oil or gas fields (not expected to be sufficiently depleted until 2030), deep underground unmineable coal seams, or deep saline aquifers.

Some producers are shifting their focus to metallurgical coal, a higher - quality form that is mined underground, rather than the thinner seams exposed by mountaintop mines.

Scientists think that carbon dioxide could potentially be stored in three types of underground locations: depleted oil and gas fields, unminable coal seams and briny aquifers.