Quantitative calculation of static load in deep main roadway and its application in dynamic prevention and control of rockburst.

In order to solve the problem of rockburst in deep coal mining roadway, the pattern of how the static load impacts the rockburst disaster was studied, and the occurrence mechanism of rockburst was revealed after analyzing relevant cases in mining roadway in recent years. The mechanical model for calculating the strength of coal pillar between roadways, coal pillar between roadway and stop mining line, and surrounding rocks is set up. A method for regulating, controlling and preventing the rockburst in deep roadway is proposed based on the static load calculation. The results show that the possibility of the deep shaft impact can be reduced after decreasing surrounding rock stress by the static load regulation and increasing the surrounding rock strength by the roadway position control. The research results have been applied to a certain mine in Shaanxi. According to the factors causing the ground pressure disasters in the mine road, adjustments were made to the position, direction, and protection pillars of the panel roadway at the design stage, which effectively prevented the rockburst from happening and ensured the safe production of the mine.