Sentence examples for coal extraction process from inspiring English sources

As mining shafts in the coal extraction process become deeper, especially in western China, an artificial freezing method is used and is concentrated in the fractured rock mass.

For a discussion of the coal-extraction process, see the article coal mining.

This activity generates large amounts of commercial, high-calorific coal; however, the extraction process also produces and accumulates significant amounts of lignite type low rank coals (LRC).

Although the interaction of gas and coal has been comprehensively investigated in coalbed methane (CBM) extraction process, fewer scholars have taken the effect of temperature and groundwater into account, which brought a large deviation for CBM extraction design.

Mountaintop removal involves a simple, 5-step process of coal extraction.

UCG offers a coal extraction and conversion method in a single process that avoids many of the challenges associated with conventional mining practices.

Coal is dirty and outdated, from the extraction process to its waste disposal.

Vinegar extractions were extracted employing a liquid liquid extraction process.

However, during the extraction process of deeper and gassier coal seams, new challenges to current gas control methods have emerged, these include the conflict between the coal mine safety and the economic benefits, the difficulties in reservoirs improvement, as well as the imbalance between pre-gas drainage, roadway development and coal mining.

Suncor has run into an extra rich piece of ore with a high coal component, he said, which caused problems in the extraction process.

Hence, the swelling of coal causes a small loss of organic solvents during the extraction process.