Application of Control Chart on Determination of Sensitive Index of Coal and Gas Outburst

Predictive index used on the prediction of coal and gas outburst should truthfully reflect the natural conditions,prevent outburst in a low index,so it is necessary to analysis and determine the sensitive index.Control chart is a method to distinguish the products fine or not,can be used to find the upper limit value of sensitive index,bring convenience for coal mine workers to choose the right critical value of sensitive index,it is practical and effective.