Sentence examples for portion of coal from inspiring English sources

It is also observed that the central portion of coal pillar defined as elastic pillar core plays a significant role on loading capacity of pillars, increasing coal pillar strength and decreasing Bursting Energy Index (WCF).

The inorganic portion of coal can range from a few percent to > 50% (by weight) and is composed of phyllosilicates (kaolinite, illite, etc)., quartz, carbonates, sulfides, sulfates, and other minerals (Meyers 1982).

Re "Energy Rhetoric, and Reality" (editorial, Jan . 25, about the president's request for alternative fuels from coal: You oppose converting a portion of United States coal reserves, the world's largest, into transportation fuel because of alleged environmental effects.

The REY distribution through the K2 coal shows that the top and bottom portion of the coal seam has a lower content of REY than that in the middle portion.

Nonmarine strata typically became coal beds, and Pennsylvanian cyclothems contain the major portion of world coal reserves.

The REY distribution through the K2 coal seam shows that the top and bottom portion of the coal seam have a lower content of REY than the middle portion.

The largest portion of the coal used in Finland is produced and imported from Russia; some coal from Poland is also used.

The REY content variations through the K2 coal in the Moxinpo mine shows that the top and bottom portion of the coal seam have relatively lower contents than the middle portion (Fig. 3), indicating a certain REY fractionation.

Colorado's Clean Air-Clean Jobs Act (HB 1365) is crafted to take Colorado past its coal intensive glory by ordering Xcel Energy (and Black Hills) to retire or retrofit a significant portion of their coal burning capacity and supplant it with natural gas.

The largest portion of the Coal Measures, however, consists of nonmarine shales and mudstones in which plant and freshwater invertebrate fossils are found.

Those briefed on internal discussions say that Washington recognizes that Mongolia will dole out its resources among various interests but insists that Peabody receive the lead role in developing the new portion of the coal mine.