The research on gas geology rule and gas outburst danger zone prediction at sima coal mine

The determation of gas weathering zone and the main control factors of the gas occurrence are the two aspects of the discussion of the rule of gas occurrence in coal mine.This artical introduces the basic conditions of the Sima coal mine which including analyz the gas consequences in Sima coal mine and using the theroy of sequential control system of geological structure to analyze the features of the gas occurrence in coal.Thus it defines the gas waethering zone in No.3 coal mine and analyzes the occurrence of gas and the main effective geology factors of gas occurrence.In order to exploit the gas of coal reasonably,prevent and cure the coal and gas outburst,provide the foundation for the safe production in the future,this article aims to analyze the danger index of gas outburst and predict the danger zone of coal and gas outburst in No.3 coal mine by using the single index method.