Influence of Stresses and Displacements in Roof Rocks on Roof Fracture in Top Coal Caving
V. E. Mirenkov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: очистная выработка, пласт, труднообрушаемые кровли, смещения, статика, кинематика, динамика, breakage heading, seam, difficult top coal, displacements, statics, kinematics, dynamics
Abstract
The process of roof caving at face during its advance is impossible to describe by static and kinematic solutions. It is necessary to take into account unsymmetry of deformation due to the dynamic component of the roof caving process. To that end, it is required to undertake experimental and theoretical studies into the unsymmetrical displacement distribution. It seems to be possible to obtain additional information on deformation and caving of roof rocks from the elastic solution. The main factors to ensure correct formulation of problems are the statics, kinematics and dynamics of rock mass deformation, and the proposed description of the inelasticity zone in the host rocks-mineable seam system.
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