About dynamics of side rock in their sudden collapse

Abstract

As a result of analyzes, with the aim of studying the dynamics of the wall rocks at their sudden collapse, prepared according to changes in the frequency, the oscillation period and the coordinate points of the body (the beam - just a roof) for bearing on a fixed pivot bearing and on an elastic foundation. The effects of fluctuations in the beam bending state of rocks mined seam roof with different methods of roof management - a complete collapse (deduction at the chock) and stowing. Fluctuations of this type are associated with the flexural deformation of beams, abbrev fluctuations in the load bearing beams. As the cargo considered heaped rock walls and supporting beams - just rock roof. Comprehensive research method was used with the use of theoretical mechanics, contact mechanics and the theory of elasticity. It is concluded that the development of reservoirs in difficult geological conditions at great depths is preferable to use a complete stowing or wide pliable strips. Tabbed array or pliable supports, which are based on breed and close the main roof as a result of their separation, eliminate negative phenomena manifested in the solid when a sudden collapse of the wall rocks or planting of the main roof. These solutions will improve the stability of development workings and as a consequence, reduce the level of injuries miners from landslides and collapses