Nature and forecast of regional zoning of dynamic phenomena in mines of Donbass

Antsiferov, A. V.; Dovbnich, M. M.; Kanin, V. A.; Viktorenko, I. A.

doi:10.24028/gzh.0203-3100.v34i5.2012.116666

Cited by 1 publication

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“…Within the coal basins (Donetsk 46 , Kuznetsk 47 ) and individual minefields, zoning of gas-dynamic phenomena and their connection with geological disturbances has been established, which is explained by the high-stress state of the rocks in the massif 48 . As shown in Refs.…”

Section: Influence Of Geological Processes On Coal Propertiesmentioning

confidence: 99%

Changes in the stability of coal microstructure under the influence of weak electromagnetic fields

Bazaluk,

Sobolev,

Molchanov

et al. 2024

Sci Rep

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The article presents experimental results of research concerning the action of weak electric and magnetic fields on physicochemical transformations in samples of hard coal with a previously destabilized microstructure. The actions of electric and magnetic fields are fundamentally different by many parameters. It has been shown that after treatment with a weak electric field, coal posted an electret potential with an anomalously continuous charge relaxation. Compared to untreated coal samples, the rate of methane emission from methane-saturated samples is maximum for long-flame coal and decreases as it approaches anthracite. The electric field stimulates the grinding of microparticles, a decrease in the maximum gas outlet temperature, a decrease in the enthalpy value in the formation of a new phase, and an increase in the chemical activity of treated coal samples. Fundamentally different results were obtained with magnetic stimulation of coals. In X-ray diffractograms of coal powders after magnetic treatment, the values of the maxima of the main peaks are the largest in comparison with the original samples and those treated with an electric field, which is consistent with an increase in the size of microparticles in a magnetic field. There is an increase in the heat of combustion and a decrease (by 5 times) in the loss of coal mass during heating.

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Section: Influence Of Geological Processes On Coal Propertiesmentioning

confidence: 99%