Problems of twice-used preparatory courses support abroad with using materials of active force of initial thrust and rapid growth of resistance and on mines of Russian Donets Basin with using pedestals of wooden-concrete blocks BDB for making support band are considered. Recommendations for enhancement preparatory courses support technological schemes with using pneumatic timbering are suggested.
The main parameters on which the schemes of oil shale development under water-bearing sediments depend have been established. Resource-saving and environmentally friendly oil shale mining schemes were developed specifically for the Leningradskaya mine.
Designing of mine workings, mining, construction of underground structures of various purposes at great depths and in difficult mining and geological conditions is closely connected with the task of defining the stress-strain state (SSS) of rock massifs.
The issues of manifestation of rock pressure and the interaction of the roof with the side rocks in the cleaning faces of thin and very thin coal seams at unmanned excavation are complex and poorly studied.
On the basis of studying the mechanism of formation of pressure cracks and roof movement within the unfixed part of the bottom-hole space and face faces of low-lying formations of Donbass it is established that the immediate roof should be considered as a system having a block structure ...
