Study on Mechanism of Rock Burst Induced by Z Shaped-Coal Pillar in Bump- Prone Seam

In order to obtain rock burst mechanism and major influencing factors of deep coal face in Changcun Mine, this paper research rock burst mechanism an d major influencing factors based on the basic theory and numerical simulation. This paper analyzed the load beared by coal pillar based on catastrophic theory, and ob tained the major influencing factors of Z shaped-coal pillar rock burst were the roof rock rigidity, the suspended length of goaf roof, the width of coal pillar, the rock cohe sion and angle of internal friction. Through theoretical derivation on the destabilization conditions of rock burst induced by coal pillar based on the cusp catastrophe mo del, the paper obtained the mathematical relationship between Z shaped-coal pillar rock burst and the influencing factor. Through the numerical simulation, the law of st ress distribution in Z shaped-coal pillar area was achieved.