At present, the share of coal seams in the mines of the Soviet Union with hard-to-collapse roofs is quite high.
How to cite:
Bezkaravayny V.G., Timofeev V.I., Ryskunov A.A. Determination of parameters of explosion-hydro treatment of hard-to-collapse roof of hollow coal seams // Journal of Mining Institute. 1990. Vol. 123 . p. 33-36.
