Abstract: In order to deeply understand the disasters of coal and gas outburst occurring in the geological structure area, a self-developed simulation experimental device of coal and gas outburst was used to research the stress distribution throughout the complex geological structure zone, the influence of the stress on the gas occurrence and accumulation in the geological structural belt was analyzed, and the mechanical mechanism of the coal and gas outburst in the complex geological structure zone was explained from the view of geology. The results show that the distribution of stress throughout the complex structure zone is complicated, that the concentration positions of the stress are mainly distributed over the area around the turning point along the fracture surface of the reverse fault, and the concentrated stress can reach 1.3 to 1.7 times of the primary rock stress, that in the process of complex structure forming, the coal body structure is seriously damaged and the tectonic coal develops very well,that the stress would facilitate the gas migration to and accumulation in the seam area, making it a enrichment region of high pressure gas, and that both the development of tectonic coal and much gas under the artesian condition create a necessary condition for the coal and gas outburst.

Key words: complex geological structure zone, reverse fault, simulation experiment, coal and gas outburst, geological control