Geochemical features of coals of the Mezhegey deposit

An analysis of the correlations between the ash content of coal (A^d_ср) and the content of ash-forming elements was carried out. Significant positive pairwise correlations were revealed in the accumulations of SiO₂, Al2O₃, TiO₂ and each of them with ash content A^d_ср (r^cr_0.05=0.23). In the group Fe₂O₃, MgO, CaO, a significant positive correlation is observed between the accumulations of only Fe₂O₃ and MgO, but each of them correlates negatively with A^d_ср. A qualitative analysis of the distributions of petrochemical modules (GM, AM, ZhM, TM) of coal ash from the 2.2-Ulug seam of the Mezhegey deposit was carried out. Hydrolyzate destruction of the mineral matter of coal in 94% of the studied sample (n = 70) is represented by superhydrolysates (GM_min 2.07, GM_max 7.45), normohydrolysates (GM_min 0.86, GM_max 1.95), hypohydrolysates (GM_min 0.56, GM_max 0.84). A combined analysis of correlations between the ash content of coal (A^d_ср) and the contents of ash-forming elements and petrochemical modules of ash made it possible to establish the origin of ash-forming elements - ash-carrier Fe is aquagenic, ash-carriers Al, Ti are allotigenic.