China is a major coal-producing country that consumes large amounts of coal every year. Due to the existence of many small coal kilns using backward mining methods, numerous worked-out areas have been formed. The coal mines were abandoned with no mitigat
Mechanical behavior, failure pattern and damage evolution of fiber-reinforced cemented sulfur tailings backfill under uniaxial loading. Constr. Build. Mater. 2022, 332, 127248. [Google Scholar] [CrossRef] Zhang, C.; Wang, J.; Song, W.; Fu, J. Pore structure, mechanical behavior and damage...
A weak band at 164 cm−1 can be attributed to the vibration of sulfur [35]. Some authors attribute bands at low frequencies to acoustic vibrations [34,36]. Figure 18. Raman spectrum of greenockite. To confirm the structure of the studied crystals, an X-ray powder diffraction analysis ...
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Whole rock Brora coal shows Te enrichment compared to estimates of world average Te coal compositions, but more significant Te enrichment occurs in the rims of discrete pyrite phases. Anomalous Te coincides with Se and Hg in the pyritic rim, suggesting incorporation of these elements during the ...