Based on the selected options of room-and-pillar systems, there are distinguished the main criteria and technical-and-economic indices having an impact on the rationality of mining systems’ use when decreasing the depth of room work conductance.

With progress in depth, the most effective way to increase the field of application of room and pillar system is the transition to the combined support of the ore-concrete-ore or concreteore-concrete methods. With this arrangement, treatment of mine workings along the strike of the ore body...

The relevance of the problem is conditioned by the need to change the extensive way of education development. It is impossible to increase the base of specific knowledge indefinitely. Today, something else is required: modern and intellectual education. The article is aimed at finding the way for...

The paper presents economic justification for applicability of near-surface geothermal installations in Luga region, based on results of techno-economic calculations as well as integrated technical and economic comparison of different prediction scenarios of heat supply, both conventional and...