Reduction of gas-saturated gently sloping coal seams i31 using hydrodynamic impact von K. K. Sofijskij, V. I. Gavrilov, V. V. Vlasenko

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Intensification degassing shallow coal seam i31 of hydrodynamic impact von K. K. Sofijskij, V. I. Gavrilov, V. V. Vlasenko

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Grounds for more rapid development of Ukrainian state mines von A. F. Bulat, A. V. Shejko, K. K. Sofijskij, T. V. Bunko

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Improving safety of transportation, extraction and utilization of methane of surface decontaminating wells von K. K. Sofijskij, R. K. Stasevich, D. A. Pritula, E. E. Dudlja

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Intensification of coalbed methane recovery by pneumohydrodynamic impact with use of carbonaceous agents von D. A. Pritula, R. A. Agaev, K. K. Sofijskij, V. V. Novoseltsev

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Methane blocking in the coal seam by solutions of polymers von R. A. Agaev, Ju. Andreev, Ju. Makeev, G. A. Ryzhov, K. K. Sofijskij

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