Coal, containing all the elements that are present in nature and more than 200 minerals, has
a complex chemical structure, making it one of the most complex geological materials …

Coal is a complex geologic material composed mainly of organic matter and mineral matter,
the latter including minerals, poorly crystalline mineraloids, and elements associated with …

The material classed as “mineral matter” in coal embraces crystalline mineral materials as
well as a range of inorganic elements that occur in non-crystalline form. This review outlines …

Coal seam gas drainage is not only the effective measure for gas outbursts control, but also
has the great significance for the use of gas energy and reduction of greenhouse-gas …

Coal bed and shale gas can be of thermogenic, microbial or of mixed origin with the
distinction made primarily on the basis of the molecular and stable isotope compositions of …

The evolution of coal permeability is very complex under the influence of coupled multiple
processes. This is the primary motivation why numerous coal permeability models have …

The petrological, geochemical, and mineralogical compositions of the coal-hosted Jurassic
uranium ore deposit in the Yili Basin of **njiang province, northwestern China, were …

Coal is a complex dual-porosity porous medium that consists of both fractures and coal
matrices containing pores. The gas seepage characteristics in coals are closely related to …

The Late Permian coal in the Fusui Coalfield of southern China is characterized by high Fe-
sulfide and organic sulfur contents (2.60 and 2.94%, respectively). Trace elements including …

This paper reports the mineralogical and geochemical compositions of the Late Permian C2
and C3 coals (both medium volatile bituminous coal) from the **nde Mine, near Xuanwei in …