Increase of ores mining safety based on combined backfilling of mining chambers space

Main research and practical results presented devoted to increase of ores mining safety, based on combined backfilling of mining space. An actuality of the solid stowing usage for backfilling of stoped excavation space shown, when combined with loose stowing during underground mining of deposits.
A methodology of research and peculiarities of mining blocks chambers isolation presented when using loose mixture in the combined stowing.