Application of multi-parameter outburst warning technology based on gas geological characteristics in Xinjian Coal Mine

In view of the complex geological structure, the uneven coal seam gas occurrence, and the difficulty of prevention and control of coal and gas outburst in Xinjian Coal Mine, using gas geology theory and coal mine disaster early warning technology comprehensively, based on the data of gas dynamic phenomenon and outburst prevention in the mine in the last 5 years, a multi-parameter early warning indicator system for coal and gas outburst based on gas geological characteristics has been established. This paper analyzed the relationship between gas geological factors and the value of coal and gas outburst prediction index K₁, determined five early warning indicators and their critical values, including coal seam thickness change rate, coal seam dip change rate, soft layer thickness, fault influence range, coal seam gas content (or pressure). On this basis, the outburst early warning model of gas geological features was established, and the method of judging the early warning grade was put forward.At the same time, a gas outburst early warning system has been developed, which has achieved good application effect in Xinjian Coal Mine, providing a useful reference for outburst early warning in similar conditions.