Abstract: Aiming at characteristics of rock burst induced by anticline structure, based on material mechanics and theory of Winkler beam on elastic foundation, mechanical model of anticline genesis was establish, the deflection, bending moment and strain energy of the model were deduced. By using UDEC numerical simulation, distribution laws of advanced abutment pressure affected by anticlinal axis were revealed, and surplus energy of E0-Ec at the peak of abutment pressure were studied. Results show that the formation of anticline is influenced by multiple factors. The smaller the buried depth of coal seam, bulk density of overlying strata, characteristic coefficient and foundation coefficient, the larger the tectonic stress, and the easier anticline structure can be formed. In addition, strain energy changes with its locations in anticline structure. The larger the tectonic stress, the smaller the flexural rigidity, and the larger the strain energy in micro-segment dx. With the continuous advancing of working face, the phenomenon of “connection-overlay-separation” of advanced abutment pressure and high tectonic stress of anticlinal axis has been presented. Meanwhile, the closer the distance of working face to anticlinal axes, the larger the surplus energy at the peak of abutment pressure, and the greater the occurrence possibility of rock burst.

Key words: rock burst, anticline structure, mechanical model, numerical simulation, abutment pressure, energy distribution