Modelling the trajectory of a fracture that moves under the influence of the fluid pressure in hard rock roofs of in-seam working

International Scientific Conference "Knowledge-based technologies in development and utilization of mineral resources"

Cherdantsev, N.V.^1

Federal Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, 10 Leningradsky ave, Kemerovo city

650065, Russia^1

关键词: Fluid pressures;    Fragile materials;    Gravitational fields;    Infinite plane;    Internal fluid pressure;    Plane deformation;    Rock massif;    Solid mechanics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/206/1/012005/pdf
DOI  :  10.1088/1755-1315/206/1/012005

来源: IOP

【 摘 要 】

Presents the results of the solution to the problem of creation of a trajectory of movement in the roof rocks of the reservoir production artificially created cracks under the action of internal fluid pressure. The array is loaded equivalent gravitational field stresses and he is in condition of plane deformation. The emergence of cracks and admission thereto of fluid are not considered. Breeds of soil and roof of layer strong enough to deform elastically and upon reaching the limit state of collapse as the fragile materials. The problem is solved in the framework of model of geomechanical state of rock massif containing local zones in the ultimate state. The model is based on the main provisions of the solid mechanics, it is implemented by means of boundary element method and classical views of the state of the crack, its stable and unstable growth in an infinite plane of a brittle material based on the theories of Griffiths - Irwin.